CN117098881A - Multifilament yarn, method for producing the same, and staple fiber and method for producing the same - Google Patents
Multifilament yarn, method for producing the same, and staple fiber and method for producing the same Download PDFInfo
- Publication number
- CN117098881A CN117098881A CN202280024869.2A CN202280024869A CN117098881A CN 117098881 A CN117098881 A CN 117098881A CN 202280024869 A CN202280024869 A CN 202280024869A CN 117098881 A CN117098881 A CN 117098881A
- Authority
- CN
- China
- Prior art keywords
- multifilament
- producing
- filaments
- multifilament yarn
- poly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000835 fiber Substances 0.000 title claims description 55
- 238000004519 manufacturing process Methods 0.000 title claims description 53
- 229920005989 resin Polymers 0.000 claims abstract description 66
- 239000011347 resin Substances 0.000 claims abstract description 66
- 229920000739 poly(3-hydroxycarboxylic acid) polymer Polymers 0.000 claims abstract description 63
- 229920001610 polycaprolactone Polymers 0.000 claims abstract description 37
- 239000004632 polycaprolactone Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims description 43
- 238000009987 spinning Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 31
- 238000004804 winding Methods 0.000 claims description 30
- 239000000155 melt Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 238000002074 melt spinning Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 238000009730 filament winding Methods 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 59
- 239000007789 gas Substances 0.000 description 28
- 238000002425 crystallisation Methods 0.000 description 19
- 230000008025 crystallization Effects 0.000 description 19
- 239000002243 precursor Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000314 lubricant Substances 0.000 description 13
- 229920000070 poly-3-hydroxybutyrate Polymers 0.000 description 12
- 239000003484 crystal nucleating agent Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- -1 polybutylene succinate Polymers 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000002667 nucleating agent Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- WHBMMWSBFZVSSR-UHFFFAOYSA-M 3-hydroxybutyrate Chemical compound CC(O)CC([O-])=O WHBMMWSBFZVSSR-UHFFFAOYSA-M 0.000 description 5
- WHBMMWSBFZVSSR-UHFFFAOYSA-N R3HBA Natural products CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001737 promoting effect Effects 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 229920000704 biodegradable plastic Polymers 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229920001661 Chitosan Polymers 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 3
- 229920002988 biodegradable polymer Polymers 0.000 description 3
- 239000004621 biodegradable polymer Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920002101 Chitin Polymers 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-UHFFFAOYSA-N 0.000 description 2
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229920000747 poly(lactic acid) Polymers 0.000 description 2
- 239000004626 polylactic acid Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 1
- HDUNAIVOFOKALD-RLCYQCIGSA-N (1s,2s)-1-[(4r)-2-(4-methylphenyl)-1,3-dioxolan-4-yl]-2-[(4s)-2-(4-methylphenyl)-1,3-dioxolan-4-yl]ethane-1,2-diol Chemical compound C1=CC(C)=CC=C1C1O[C@@H]([C@@H](O)[C@H](O)[C@H]2OC(OC2)C=2C=CC(C)=CC=2)CO1 HDUNAIVOFOKALD-RLCYQCIGSA-N 0.000 description 1
- ALKCLFLTXBBMMP-UHFFFAOYSA-N 3,7-dimethylocta-1,6-dien-3-yl hexanoate Chemical compound CCCCCC(=O)OC(C)(C=C)CCC=C(C)C ALKCLFLTXBBMMP-UHFFFAOYSA-N 0.000 description 1
- HPMGFDVTYHWBAG-UHFFFAOYSA-N 3-hydroxyhexanoic acid Chemical compound CCCC(O)CC(O)=O HPMGFDVTYHWBAG-UHFFFAOYSA-N 0.000 description 1
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- HEBKCHPVOIAQTA-QWWZWVQMSA-N D-arabinitol Chemical compound OC[C@@H](O)C(O)[C@H](O)CO HEBKCHPVOIAQTA-QWWZWVQMSA-N 0.000 description 1
- XTJFFFGAUHQWII-UHFFFAOYSA-N Dibutyl adipate Chemical compound CCCCOC(=O)CCCCC(=O)OCCCC XTJFFFGAUHQWII-UHFFFAOYSA-N 0.000 description 1
- UDSFAEKRVUSQDD-UHFFFAOYSA-N Dimethyl adipate Chemical compound COC(=O)CCCCC(=O)OC UDSFAEKRVUSQDD-UHFFFAOYSA-N 0.000 description 1
- 239000004386 Erythritol Substances 0.000 description 1
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920000954 Polyglycolide Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 150000001923 cyclic compounds Chemical class 0.000 description 1
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 1
- 229940100539 dibutyl adipate Drugs 0.000 description 1
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 description 1
- 238000010036 direct spinning Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- FBPFZTCFMRRESA-GUCUJZIJSA-N galactitol Chemical compound OC[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-GUCUJZIJSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Chemical class 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QEALYLRSRQDCRA-UHFFFAOYSA-N myristamide Chemical compound CCCCCCCCCCCCCC(N)=O QEALYLRSRQDCRA-UHFFFAOYSA-N 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001020 poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) Polymers 0.000 description 1
- 229920000520 poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Polymers 0.000 description 1
- 229920001013 poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Polymers 0.000 description 1
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 description 1
- 239000004629 polybutylene adipate terephthalate Substances 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920009537 polybutylene succinate adipate Polymers 0.000 description 1
- 239000004630 polybutylene succinate adipate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000004633 polyglycolic acid Substances 0.000 description 1
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 229910001927 ruthenium tetroxide Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/36—Matrix structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
Abstract
本发明为复丝等，所述复丝是具备多根单丝的复丝，其中，上述单丝含有聚(3‑羟基烷酸酯)类树脂及聚己内酯，上述单丝的纤度为1.0～5.0dtex，上述单丝的拉伸强度为2.5cN/dtex以上。The present invention is a multifilament, etc., the multifilament is a multifilament including a plurality of monofilaments, wherein the monofilaments contain poly(3-hydroxyalkanoate) resin and polycaprolactone, and the fineness of the monofilaments is 1.0~5.0dtex, the tensile strength of the above-mentioned monofilament is above 2.5cN/dtex.
Description
技术领域Technical Field
本发明涉及复丝及其制造方法、以及短纤维及其制造方法。The present invention relates to a multifilament and a method for producing the same, and a staple fiber and a method for producing the same.
背景技术Background Art
近年来，塑料废弃物存在对于生态系统造成影响、燃烧时产生有害气体、大量的燃烧热量导致全球变暖等成为给地球环境带来很大负担的原因的问题。作为能够解决该问题的方式，正在积极地进行生物降解性塑料的开发。In recent years, plastic waste has become a major burden on the global environment, affecting the ecosystem, generating harmful gases when burned, and causing global warming due to the large amount of heat from burning. As a way to solve this problem, the development of biodegradable plastics is being actively pursued.
在这样的生物降解性塑料中，使用来自于植物的原料而得到的生物降解性塑料燃烧时放出的二氧化碳原本就存在于空气中，因此大气中的二氧化碳不会增加。这被称为碳中和，在设定了二氧化碳减排目标值的京都议定书的情况下受到重视，希望得到积极的使用。In such biodegradable plastics, carbon dioxide released when biodegradable plastics made from plant materials are burned already exists in the air, so carbon dioxide in the atmosphere does not increase. This is called carbon neutrality, and is valued under the Kyoto Protocol, which sets a target value for carbon dioxide emission reduction, and is expected to be used actively.
最近，从生物降解性及碳中和的观点考虑，作为以来自于植物的原料作为碳源由微生物产生的生物降解性塑料，脂肪族聚酯类树脂备受关注，特别是聚羟基烷酸酯类树脂备受关注。Recently, from the viewpoint of biodegradability and carbon neutrality, aliphatic polyester resins, and in particular polyhydroxyalkanoate resins, have attracted attention as biodegradable plastics produced by microorganisms using plant-derived raw materials as carbon sources.
专利文献1中公开了具备多根含有3-羟基烷酸酯聚合物的单丝的复丝。Patent Document 1 discloses a multifilament yarn including a plurality of monofilaments containing a 3-hydroxyalkanoate polymer.
现有技术文献Prior art literature
专利文献Patent Literature
专利文献1：国际公开第2015/029316号Patent Document 1: International Publication No. 2015/029316
发明内容Summary of the invention
发明要解决的课题Problems to be solved by the invention
今后会要求强度更高的复丝。In the future, there will be a demand for multifilaments with higher strength.
但是，迄今为止，对强度高的复丝尚未进行充分的研究。However, high-strength multifilaments have not been adequately studied to date.
因此，本发明的第一课题在于提供强度高的复丝。Therefore, a first object of the present invention is to provide a multifilament having high strength.
另外，第二课题在于得到将该复丝切断而成的短纤维。In addition, a second problem is to obtain short fibers by cutting the multifilament yarn.
解决课题的方法Solution to the problem
本发明的第一方式涉及一种复丝，其具备多根单丝，其中，A first aspect of the present invention relates to a multifilament yarn comprising a plurality of monofilaments, wherein:
上述单丝含有聚(3-羟基烷酸酯)类树脂及聚己内酯，The monofilament contains poly(3-hydroxyalkanoate) resin and polycaprolactone.
上述单丝的纤度为1.0～5.0dtex，The monofilament has a fineness of 1.0 to 5.0 dtex.
上述单丝的拉伸强度为2.5cN/dtex以上。The tensile strength of the monofilament is 2.5 cN/dtex or more.
优选上述聚(3-羟基烷酸酯)类树脂的质量/上述聚己内酯的质量为30/70～80/20。It is preferred that the mass ratio of the poly(3-hydroxyalkanoate)-based resin to the mass ratio of the polycaprolactone is 30/70 to 80/20.
优选上述聚(3-羟基烷酸酯)类树脂包含以下述式(1)表示的结构单元。The poly(3-hydroxyalkanoate)-based resin preferably includes a structural unit represented by the following formula (1).
[-CHR-CH2-CO-O-](1)[-CHR-CH 2 -CO-O-](1)
(上述式(1)中，R表示以CpH2p+1所示的烷基，p表示1～15的整数。)(In the above formula (1), R represents an alkyl group represented by C p H 2p+1 , and p represents an integer of 1 to 15.)
优选上述单丝具有包含基质及微区的基质-微区结构，Preferably, the monofilament has a matrix-domain structure comprising a matrix and microdomains.
上述基质含有上述聚(3-羟基烷酸酯)类树脂，The matrix contains the poly(3-hydroxyalkanoate) resin.
上述微区含有上述聚己内酯。The microdomains contain the polycaprolactone.
另外，本发明的第二方式涉及一种短纤维，其是将上述复丝切断而成的，A second aspect of the present invention relates to a short fiber obtained by cutting the above-mentioned multifilament.
所述短纤维具有卷曲结构，The short fibers have a curled structure.
长度的平均值为200mm以下。The average length is less than 200 mm.
此外，本发明的第三方式涉及一种复丝的制造方法，其通过熔融纺丝法使用具有多个喷丝孔的纺丝喷嘴来制造具备多根单丝的复丝，该方法包括：A third aspect of the present invention relates to a method for producing a multifilament yarn, the method comprising producing a multifilament yarn having a plurality of single filaments by a melt spinning method using a spinning nozzle having a plurality of spinneret holes, the method comprising:
工序(A)，通过将熔融物从多个上述喷丝孔喷出，得到多根熔融状态的原丝；Step (A), obtaining a plurality of molten raw fibers by ejecting the melt from the plurality of spinnerets;
工序(B)，通过向熔融状态的多根上述原丝喷吹3～15℃的气体，将多根上述原丝冷却；Step (B), cooling the plurality of the raw yarns by blowing a gas at 3 to 15° C. to the plurality of the raw yarns in a molten state;
工序(C)，通过利用拉伸辊部将冷却后的多根上述原丝进行拉伸，得到上述复丝，Step (C), stretching the plurality of the cooled raw yarns by a stretching roller section to obtain the multifilament yarn,
上述熔融物含有聚(3-羟基烷酸酯)类树脂及聚己内酯，The melt contains poly(3-hydroxyalkanoate) resin and polycaprolactone,
上述单丝的纤度为1.0～5.0dtex。The monofilament has a fineness of 1.0 to 5.0 dtex.
优选上述单丝的拉伸强度为2.5cN/dtex以上。The tensile strength of the monofilament is preferably 2.5 cN/dtex or more.
优选在上述工序(C)中，通过利用热处理辊部将拉伸后的多根上述原丝进行加热，得到上述复丝。Preferably, in the step (C), the plurality of the stretched raw yarns are heated by a heat treatment roll section to obtain the multifilament yarn.
优选上述工序(C)中使用的原丝的纤度为5.0～15.0dtex。The fineness of the raw yarn used in the step (C) is preferably 5.0 to 15.0 dtex.
优选在上述工序(C)中，利用25℃以上且低于50℃的牵引辊部将通过上述工序(B)被冷却的多根原丝进行牵引并加热，利用上述拉伸辊部将在该牵引辊部被加热后的多根上述原丝进行拉伸，利用40～100℃的热处理辊部将在该拉伸辊部被拉伸后的多根上述原丝进行加热。Preferably, in the above step (C), the plurality of raw yarns cooled in the above step (B) are pulled and heated using a pulling roller section at a temperature of 25°C or higher and lower than 50°C, the plurality of raw yarns heated by the pulling roller section are stretched using the above-mentioned stretching roller section, and the plurality of raw yarns stretched by the stretching roller section are heated using a heat treatment roller section at a temperature of 40 to 100°C.
优选在上述工序(B)中，利用原丝用卷取辊部卷取被冷却的多根上述原丝，Preferably, in the step (B), the plurality of cooled raw yarns are wound up by a raw yarn winding roller unit.
在上述工序(C)中，利用上述拉伸辊部将在上述原丝用卷取辊部被卷取的多根上述原丝进行拉伸。In the step (C), the plurality of yarns wound by the yarn winding roller section are stretched by the stretching roller section.
优选上述复丝的制造方法是通过旋转抽伸(spin draw)法制造上述复丝的方法。The method for producing the multifilament yarn is preferably a method for producing the multifilament yarn by a spin draw method.
优选在上述工序(C)中，利用25～100℃的热处理辊部将在上述拉伸辊部被拉伸的多根上述原丝进行加热。In the step (C), it is preferred that the plurality of raw fibers stretched by the stretching roll section are heated by a heat treatment roll section at 25 to 100°C.
另外，本发明的第四方式涉及一种短纤维的制造方法，该方法包括：In addition, a fourth aspect of the present invention relates to a method for producing short fibers, the method comprising:
通过上述复丝的制造方法得到上述复丝，The multifilament yarn is obtained by the multifilament yarn production method.
通过将该复丝切断而得到短纤维，The multifilaments are cut to obtain short fibers.
该短纤维具有卷曲结构，The short fiber has a curly structure.
该短纤维的长度的平均值为200mm以下。The average length of the short fibers is 200 mm or less.
发明的效果Effects of the Invention
根据本发明，可以提供强度高的复丝。According to the present invention, a multifilament having high strength can be provided.
另外，根据本发明，可以提供该复丝被切断而成的短纤维。Furthermore, according to the present invention, there can be provided short fibers obtained by cutting the multifilament yarn.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是第1实施方式的工序(A)及工序(B)中使用的装置的示意图。FIG. 1 is a schematic diagram of an apparatus used in step (A) and step (B) of the first embodiment.
图2是第1实施方式的工序(C)中使用的装置的示意图。FIG. 2 is a schematic diagram of an apparatus used in step (C) of the first embodiment.
图3是第2实施方式中使用的装置的示意图。FIG. 3 is a schematic diagram of a device used in the second embodiment.
符号说明Explanation of symbols
100A：原丝、101：材料投入部、102：混炼挤出机、103：齿轮泵、104：纺丝喷嘴、105：第1冷却箱、106：第2冷却箱、107：第1牵引辊部、108：第1运送辊部、109：第2运送辊部、110：第3运送辊部、111：第4运送辊部、112：原丝用卷取辊部、113：第2牵引辊部、114：拉伸辊部(热处理辊部)、115：引出辊部(热处理辊部)、116：复丝用卷取辊部、100A: raw yarn, 101: material feeding unit, 102: kneading extruder, 103: gear pump, 104: spinning nozzle, 105: first cooling box, 106: second cooling box, 107: first pulling roller unit, 108: first conveying roller unit, 109: second conveying roller unit, 110: third conveying roller unit, 111: fourth conveying roller unit, 112: raw yarn winding roller unit, 113: second pulling roller unit, 114: stretching roller unit (heat treatment roller unit), 115: take-out roller unit (heat treatment roller unit), 116: multifilament winding roller unit,
207：牵引辊部、208：第1拉伸辊部(热处理辊部)、209：第2拉伸辊部(热处理辊部)、210：第3拉伸辊部(热处理辊部)、211：引出辊部、212：复丝用卷取辊部207: pulling roller unit, 208: first stretching roller unit (heat treatment roller unit), 209: second stretching roller unit (heat treatment roller unit), 210: third stretching roller unit (heat treatment roller unit), 211: take-off roller unit, 212: multifilament winding roller unit
具体实施方式DETAILED DESCRIPTION
＜＜复丝＞＞＜＜Multifilament＞＞
首先，对本实施方式的复丝进行说明。First, the multifilament yarn according to the present embodiment will be described.
本实施方式的复丝具备多根单丝。The multifilament yarn of the present embodiment includes a plurality of single yarns.
上述单丝含有聚(3-羟基烷酸酯)类树脂及聚己内酯(PCL)。The monofilament contains a poly(3-hydroxyalkanoate)-based resin and polycaprolactone (PCL).
上述单丝的纤度为1.0～5.0dtex。The monofilament has a fineness of 1.0 to 5.0 dtex.
上述单丝的拉伸强度为2.5cN/dtex以上。The tensile strength of the monofilament is 2.5 cN/dtex or more.
上述单丝是含有聚合物成分的聚合物组合物成形为丝状而成的单丝。The monofilament is a monofilament obtained by shaping a polymer composition containing a polymer component into a filament shape.
上述聚合物组合物可以进一步含有添加剂。The above-mentioned polymer composition may further contain additives.
上述聚合物成分包含聚(3-羟基烷酸酯)类树脂及聚己内酯。The polymer component includes a poly(3-hydroxyalkanoate) resin and polycaprolactone.
上述聚合物成分除聚(3-羟基烷酸酯)类树脂及聚己内酯以外，还可以含有其它聚合物。The polymer component may contain other polymers in addition to the poly(3-hydroxyalkanoate)-based resin and polycaprolactone.
上述聚(3-羟基烷酸酯)类树脂是以3-羟基烷酸酯作为单体的聚酯。The poly(3-hydroxyalkanoate)-based resin is a polyester containing 3-hydroxyalkanoate as a monomer.
另外，上述聚(3-羟基烷酸酯)类树脂是具有生物降解性的聚合物。In addition, the poly(3-hydroxyalkanoate)-based resin is a biodegradable polymer.
需要说明的是，本实施方式中的“生物降解性”是指能够在自然界中被微生物分解成低分子化合物的性质。具体而言，可以在需氧条件下基于ISO 14855(compost)及ISO14851(activated sludge)、在厌氧条件基于ISO 14853(aqueous phase)及ISO 15985(solid phase)等符合各环境的试验来判断有无生物降解性。另外，对于海水中的微生物的降解性，可以通过生化需氧量(Biochemical oxygen demand)的测定来评价。It should be noted that the "biodegradability" in the present embodiment refers to the property of being decomposed into low molecular weight compounds by microorganisms in nature. Specifically, the presence or absence of biodegradability can be determined by tests that meet the respective environments such as ISO 14855 (compost) and ISO 14851 (activated sludge) under aerobic conditions and ISO 14853 (aqueous phase) and ISO 15985 (solid phase) under anaerobic conditions. In addition, the degradability of microorganisms in seawater can be evaluated by measuring biochemical oxygen demand.
上述聚(3-羟基烷酸酯)类树脂可以是均聚物，也可以是共聚物。The poly(3-hydroxyalkanoate) resin may be a homopolymer or a copolymer.
上述聚(3-羟基烷酸酯)类树脂优选包含以下述式(1)表示的结构单元。The poly(3-hydroxyalkanoate)-based resin preferably includes a structural unit represented by the following formula (1).
[-CHR-CH2-CO-O-](1)[-CHR-CH 2 -CO-O-](1)
(上述式(1)中，R表示以CpH2p+1所示的烷基，p表示1～15的整数。)(In the above formula (1), R represents an alkyl group represented by C p H 2p+1 , and p represents an integer of 1 to 15.)
上述聚(3-羟基烷酸酯)类树脂优选包含3-羟基丁酸酯作为结构单元。The poly(3-hydroxyalkanoate)-based resin preferably contains 3-hydroxybutyrate as a structural unit.
作为包含3-羟基丁酸酯为结构单元的聚(3-羟基烷酸酯)类树脂，可以列举例如：P3HB、P3HB3HH、P3HB3HV、P3HB4HB、聚(3-羟基丁酸酯-共聚-3-羟基辛酸酯)、聚(3-羟基丁酸酯-共聚-3-羟基十八烷酸酯)等。Examples of the poly(3-hydroxyalkanoate) resin containing 3-hydroxybutyrate as a structural unit include P3HB, P3HB3HH, P3HB3HV, P3HB4HB, poly(3-hydroxybutyrate-co-3-hydroxyoctanoate), and poly(3-hydroxybutyrate-co-3-hydroxyoctadecanoate).
这里，P3HB是指聚(3-羟基丁酸酯)。Here, P3HB refers to poly (3-hydroxybutyrate).
P3HB3HH是指聚(3-羟基丁酸酯-共聚-3-羟基己酸酯)。P3HB3HH refers to poly(3-hydroxybutyrate-co-3-hydroxyhexanoate).
P3HB3HV是指聚(3-羟基丁酸酯-共聚-3-羟基戊酸酯)。P3HB3HV refers to poly(3-hydroxybutyrate-co-3-hydroxyvalerate).
P3HB4HB是指聚(3-羟基丁酸酯-共聚-4-羟基丁酸酯)。P3HB4HB refers to poly(3-hydroxybutyrate-co-4-hydroxybutyrate).
需要说明的是，P3HB具有促进P3HB本身及除P3HB以外的聚(3-羟基烷酸酯)类树脂的结晶化的功能，因此，上述聚(3-羟基烷酸酯)类树脂优选包含P3HB。It should be noted that P3HB has a function of promoting the crystallization of P3HB itself and a poly(3-hydroxyalkanoate)-based resin other than P3HB. Therefore, the poly(3-hydroxyalkanoate)-based resin preferably contains P3HB.
作为上述聚(3-羟基烷酸酯)类树脂，从兼顾优异的生物降解性和成型加工性的观点考虑，优选为P3HB、P3HB3HH、P3HB3HV、P3HB4HB等，没有特别限定。As the poly(3-hydroxyalkanoate)-based resin, from the viewpoint of achieving both excellent biodegradability and molding processability, P3HB, P3HB3HH, P3HB3HV, P3HB4HB and the like are preferred, but are not particularly limited.
另外，作为上述聚(3-羟基烷酸酯)类树脂，从提高本实施方式的复丝的强度、且提高成型加工性的观点考虑，优选为P3HB3HH。In addition, the poly(3-hydroxyalkanoate)-based resin is preferably P3HB3HH from the viewpoint of increasing the strength of the multifilament of the present embodiment and improving the molding processability.
上述聚(3-羟基烷酸酯)类树脂优选包含85.0摩尔％～99.5摩尔％、更优选包含85.0摩尔％～97.0摩尔％的作为结构单元的3-羟基丁酸酯。The poly(3-hydroxyalkanoate)-based resin preferably contains 85.0 mol% to 99.5 mol%, more preferably 85.0 mol% to 97.0 mol%, of 3-hydroxybutyrate as a structural unit.
通过使上述聚(3-羟基烷酸酯)类树脂包含85.0摩尔％以上的作为结构单元的3-羟基丁酸酯，本实施方式的复丝的刚性增高。When the poly(3-hydroxyalkanoate)-based resin contains 85.0 mol % or more of 3-hydroxybutyrate as a structural unit, the rigidity of the multifilament of the present embodiment is increased.
另外，通过使上述聚(3-羟基烷酸酯)类树脂包含99.5摩尔％以下的作为结构单元的3-羟基丁酸酯，本实施方式的复丝的柔软性优异。Furthermore, since the poly(3-hydroxyalkanoate)-based resin contains 99.5 mol % or less of 3-hydroxybutyrate as a structural unit, the multifilament yarn of the present embodiment has excellent softness.
上述聚合物成分可以仅包含1种上述聚(3-羟基烷酸酯)类树脂，也可以包含2种以上。The polymer component may contain only one type of the poly(3-hydroxyalkanoate)-based resin, or may contain two or more types.
上述聚(3-羟基烷酸酯)类树脂在包含共聚物(P3HB3HH等)的情况下，可以包含结构单元的平均组成比不同的2种以上的共聚物。When the poly(3-hydroxyalkanoate)-based resin includes a copolymer (P3HB3HH or the like), the poly(3-hydroxyalkanoate)-based resin may include two or more copolymers having different average composition ratios of structural units.
上述聚(3-羟基烷酸酯)类树脂是重均分子量优选为50000～3000000、更优选为100000～1500000。The poly(3-hydroxyalkanoate) resin preferably has a weight average molecular weight of 50,000 to 3,000,000, and more preferably 100,000 to 1,500,000.
通过使上述聚(3-羟基烷酸酯)类树脂的重均分子量为3000000以下，本实施方式的复丝的成形变得容易。When the weight average molecular weight of the poly(3-hydroxyalkanoate)-based resin is 3,000,000 or less, the multifilament yarn of the present embodiment can be easily formed.
通过使上述聚(3-羟基烷酸酯)类树脂的重均分子量为50000以上，能够提高本实施方式的复丝的强度。When the weight average molecular weight of the poly(3-hydroxyalkanoate)-based resin is 50,000 or more, the strength of the multifilament of the present embodiment can be increased.
需要说明的是，本实施方式中的重均分子量使用利用氯仿洗脱液的凝胶渗透色谱(GPC)根据聚苯乙烯换算分子量分布而测定。作为该GPC的色谱柱，可以使用适合测定上述分子量的色谱柱。The weight average molecular weight in the present embodiment is measured based on the polystyrene-equivalent molecular weight distribution using gel permeation chromatography (GPC) using a chloroform eluent. As the chromatographic column of the GPC, a chromatographic column suitable for measuring the above-mentioned molecular weight can be used.
上述聚己内酯为ε-己内酯开环聚合而成的聚合物。The polycaprolactone is a polymer obtained by ring-opening polymerization of ε-caprolactone.
另外，聚己内酯与聚(3-羟基烷酸酯)类树脂同样地具有生物降解性。In addition, polycaprolactone is biodegradable like poly(3-hydroxyalkanoate)-based resins.
此外，通过使单丝含有聚己内酯，本实施方式的复丝的强度增高。Furthermore, by making the monofilament contain polycaprolactone, the strength of the multifilament of the present embodiment is increased.
上述聚己内酯的重均分子量优选为5000～500000、更优选为10000～200000。The weight average molecular weight of the polycaprolactone is preferably 5,000 to 500,000, more preferably 10,000 to 200,000.
通过使上述聚己内酯的重均分子量为500000以下，本实施方式的复丝的成形变得容易。When the weight average molecular weight of the polycaprolactone is 500,000 or less, the multifilament yarn of the present embodiment can be easily formed.
通过使上述聚己内酯的重均分子量为5000以上，可以提高本实施方式的复丝的强度。When the weight average molecular weight of the polycaprolactone is 5,000 or more, the strength of the multifilament of the present embodiment can be increased.
其它聚合物优选具有生物降解性。The other polymer is preferably biodegradable.
作为具有生物降解性的其它聚合物，可以列举例如：聚乳酸、聚丁二酸丁二醇酯、聚丁二酸己二酸丁二醇酯、聚己二酸对苯二甲酸丁二醇酯、聚丁二酸乙二醇酯、聚乙烯醇、聚乙醇酸、未改性淀粉、改性淀粉、乙酸纤维素、壳聚糖、聚(4-羟基烷酸酯)类树脂等。Examples of other biodegradable polymers include polylactic acid, polybutylene succinate, polybutylene succinate adipate, polybutylene adipate terephthalate, polyethylene succinate, polyvinyl alcohol, polyglycolic acid, unmodified starch, modified starch, cellulose acetate, chitosan, and poly(4-hydroxyalkanoate) resins.
上述聚合物组合物可以包含1种其它聚合物，另外，也可以包含2种以上。The polymer composition may contain one type of other polymer or two or more types of other polymer.
上述聚合物成分合计优选含有50质量％以上、更优选含有80质量％以上、进一步优选含有90质量％以上的聚(3-羟基烷酸酯)类树脂和聚己内酯。The polymer components preferably contain 50% by mass or more, more preferably 80% by mass or more, and even more preferably 90% by mass or more of the poly(3-hydroxyalkanoate)-based resin and polycaprolactone in total.
上述聚(3-羟基烷酸酯)类树脂的质量/上述聚己内酯的质量优选为30/70～80/20、更优选为40/60～75/25、进一步优选为55/45～70/30。The mass ratio of the poly(3-hydroxyalkanoate) resin to the mass ratio of the polycaprolactone is preferably 30/70 to 80/20, more preferably 40/60 to 75/25, and even more preferably 55/45 to 70/30.
通过使上述聚(3-羟基烷酸酯)类树脂的质量/上述聚己内酯的质量为30/70以上，具有本实施方式的复丝的耐热性优异的优点。When the mass of the poly(3-hydroxyalkanoate)-based resin/the mass of the polycaprolactone is set to 30/70 or more, there is an advantage that the multifilament of the present embodiment has excellent heat resistance.
通过使上述聚(3-羟基烷酸酯)类树脂的质量/上述聚己内酯的质量为80/20以下，具有本实施方式的复丝的强度容易增高的优点。When the mass of the poly(3-hydroxyalkanoate)-based resin/the mass of the polycaprolactone is set to 80/20 or less, there is an advantage that the strength of the multifilament of the present embodiment is easily increased.
优选上述单丝具有包含基质及微区的基质-微区结构，上述基质含有上述聚(3-羟基烷酸酯)类树脂，上述微区含有上述聚己内酯。It is preferred that the monofilament has a matrix-domain structure including a matrix and domains, the matrix contains the poly(3-hydroxyalkanoate)-based resin, and the domains contain the polycaprolactone.
通过使上述单丝成为这样的构成，本实施方式的复丝具有耐热性优异的优点。Since the above-mentioned single yarn has such a structure, the multifilament of this embodiment has an advantage of being excellent in heat resistance.
本实施方式的复丝具有这样的优点的原因可以认为是以下原因。The reason why the multifilament yarn of the present embodiment has such advantages is considered to be the following.
这里，基质-微区结构也称为海岛结构。基质-微区结构中，基质为连续相。另一方面，微区如浮在海上的岛那样为非连续相。Here, the matrix-domain structure is also called the sea-island structure. In the matrix-domain structure, the matrix is a continuous phase, while the domains are discontinuous phases like islands floating on the sea.
由此，基质侧的特性主要表现为单丝的特性。Thus, the properties of the substrate side mainly reflect those of the monofilaments.
聚(3-羟基烷酸酯)类树脂比聚己内酯的耐热性高。Poly(3-hydroxyalkanoate)-based resins have higher heat resistance than polycaprolactone.
因此可以认为，通过使上述单丝成为这样的构成，本实施方式的复丝的耐热性优异。Therefore, it is considered that the multifilament of the present embodiment has excellent heat resistance by configuring the above-mentioned single yarn in such a structure.
本实施方式的复丝通过包含具有生物降解性的聚合物，即使废弃在环境中，也容易在环境中被分解，因此能够抑制对于环境的负担。Since the multifilament of the present embodiment includes a biodegradable polymer, it is easy to be decomposed in the environment even if it is discarded in the environment, and thus the burden on the environment can be suppressed.
作为上述添加剂，可以列举例如：结晶成核剂、润滑剂、稳定剂(抗氧化剂、紫外线吸收剂等)、着色剂(染料、颜料等)、增塑剂、无机填充剂、有机填充剂、防静电剂等。Examples of the additives include crystal nucleating agents, lubricants, stabilizers (antioxidants, ultraviolet absorbers, etc.), colorants (dyes, pigments, etc.), plasticizers, inorganic fillers, organic fillers, antistatic agents, and the like.
为了促进聚(3-羟基烷酸酯)类树脂的结晶化，优选上述聚合物组合物含有结晶成核剂。In order to promote crystallization of the poly(3-hydroxyalkanoate)-based resin, the polymer composition preferably contains a crystal nucleating agent.
上述结晶成核剂是具有促进聚(3-羟基烷酸酯)类树脂的结晶化的效果的化合物。另外，上述结晶成核剂的熔点高于聚(3-羟基烷酸酯)类树脂。The crystal nucleating agent is a compound that has the effect of promoting the crystallization of the poly(3-hydroxyalkanoate)-based resin. In addition, the crystal nucleating agent has a melting point higher than that of the poly(3-hydroxyalkanoate)-based resin.
作为上述结晶成核剂，可以示例出无机物(氮化硼、氧化钛、滑石、层状硅酸盐、碳酸钙、氯化钠及金属磷酸盐等)；来自于天然物的糖醇化合物(季戊四醇、赤藓醇、半乳糖醇、甘露醇及阿拉伯糖醇等)；聚乙烯醇；几丁质；壳聚糖；聚环氧乙烷；脂肪族羧酸盐；脂肪族醇；脂肪族羧酸酯；二羧酸衍生物(己二酸二甲酯、己二酸二丁酯、己二酸二异癸酯及癸二酸二丁酯)；在分子内具有C＝O与选自NH、S及O的官能团的环状化合物(靛蓝、喹吖啶酮及喹吖啶酮品红等)；山梨糖醇类衍生物(二亚苄基山梨糖醇及双(对甲基亚苄基)山梨糖醇等)；包含含氮杂芳香族核(吡啶环、三嗪环及咪唑环等)的化合物(吡啶、三嗪及咪唑等)；磷酸酯化合物；高级脂肪酸的双酰胺；高级脂肪酸的金属盐；以及支链状聚乳酸等。Examples of the above-mentioned crystal nucleating agent include inorganic substances (boron nitride, titanium oxide, talc, layered silicate, calcium carbonate, sodium chloride, and metal phosphates); sugar alcohol compounds derived from natural products (pentaerythritol, erythritol, galactitol, mannitol, and arabitol); polyvinyl alcohol; chitin; chitosan; polyethylene oxide; aliphatic carboxylates; aliphatic alcohols; aliphatic carboxylic acid esters; dicarboxylic acid derivatives (dimethyl adipate, dibutyl adipate, diisodecyl adipate, and sebacic acid); dibutyl ester); cyclic compounds having C=O and a functional group selected from NH, S and O in the molecule (indigo, quinacridone and quinacridone fuchsin, etc.); sorbitol derivatives (dibenzylidene sorbitol and bis(p-methylbenzylidene) sorbitol, etc.); compounds containing a nitrogen-containing heteroaromatic core (pyridine ring, triazine ring and imidazole ring, etc.) (pyridine, triazine and imidazole, etc.); phosphate compounds; bisamides of higher fatty acids; metal salts of higher fatty acids; and branched polylactic acid, etc.
另外，作为上述聚(3-羟基烷酸酯)类树脂的P3HB也可以作为结晶成核剂使用。In addition, P3HB, which is the above-mentioned poly(3-hydroxyalkanoate)-based resin, can also be used as a crystal nucleating agent.
这些化合物可以单独使用，也可以将2种以上组合使用。These compounds may be used alone or in combination of two or more.
作为上述结晶成核剂，从聚(3-羟基烷酸酯)类树脂的结晶化速度的改善效果的观点、以及与聚(3-羟基烷酸酯)类树脂的相容性及亲和性的观点考虑，优选为糖醇化合物、聚乙烯醇、几丁质、壳聚糖。As the crystal nucleating agent, from the viewpoint of the effect of improving the crystallization rate of the poly(3-hydroxyalkanoate) resin and the viewpoint of compatibility and affinity with the poly(3-hydroxyalkanoate) resin, sugar alcohol compounds, polyvinyl alcohol, chitin, and chitosan are preferred.
另外，在该糖醇化合物中，优选为季戊四醇。Among the sugar alcohol compounds, pentaerythritol is preferred.
相对于聚(3-羟基烷酸酯)类树脂100质量份，聚合物组合物中的结晶成核剂的含量优选为0.05质量份以上、更优选为0.1质量份以上、进一步优选为0.5质量份以上。通过使聚合物组合物中的结晶成核剂的含量相对于聚(3-羟基烷酸酯)类树脂100质量份为0.05质量份以上，具有能够进一步促进聚(3-羟基烷酸酯)类树脂的结晶化的优点。The content of the crystallization nucleating agent in the polymer composition is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and further preferably 0.5 parts by mass or more, relative to 100 parts by mass of the poly(3-hydroxyalkanoate) resin. When the content of the crystallization nucleating agent in the polymer composition is 0.05 parts by mass or more relative to 100 parts by mass of the poly(3-hydroxyalkanoate) resin, there is an advantage that the crystallization of the poly(3-hydroxyalkanoate) resin can be further promoted.
另外，相对于聚(3-羟基烷酸酯)类树脂100质量份，聚合物组合物中的结晶成核剂的含量优选为10质量份以下、更优选为8质量份以下、进一步优选为5质量份以下。通过使聚合物组合物中的结晶成核剂的含量相对于聚(3-羟基烷酸酯)类树脂100质量份为10质量份以下，在由聚合物组合物熔融而成的熔融物制作复丝时，能够降低该熔融物的粘度，其结果是具有复丝的制作变得容易的优点。In addition, the content of the crystallization nucleating agent in the polymer composition is preferably 10 parts by mass or less, more preferably 8 parts by mass or less, and further preferably 5 parts by mass or less, relative to 100 parts by mass of the poly(3-hydroxyalkanoate) resin. By setting the content of the crystallization nucleating agent in the polymer composition to 10 parts by mass or less relative to 100 parts by mass of the poly(3-hydroxyalkanoate) resin, when a multifilament is produced from a melt obtained by melting the polymer composition, the viscosity of the melt can be reduced, resulting in an advantage that the production of the multifilament becomes easy.
需要说明的是，P3HB为聚(3-羟基烷酸酯)类树脂，且也能够作为结晶成核剂而发挥功能，因此，在聚合物组合物包含P3HB的情况下，P3HB的量既包含在聚(3-羟基烷酸酯)类树脂的量中，也包含在结晶成核剂的量中。It should be noted that P3HB is a poly(3-hydroxyalkanoate) resin and can also function as a crystal nucleating agent. Therefore, when the polymer composition contains P3HB, the amount of P3HB is included in both the amount of the poly(3-hydroxyalkanoate) resin and the amount of the crystal nucleating agent.
上述聚合物组合物优选含有上述润滑剂。通过使单丝包含润滑剂，单丝的润滑性变得良好，能够抑制单丝彼此的熔粘。The polymer composition preferably contains the lubricant. When the monofilaments contain the lubricant, the lubricity of the monofilaments becomes good, and the fusion of the monofilaments can be suppressed.
作为该润滑剂，可以举出例如具有酰胺键的化合物等。Examples of the lubricant include compounds having an amide bond.
上述具有酰胺键的化合物优选包含选自月桂酸酰胺、肉豆蔻酸酰胺、硬脂酸酰胺、山嵛酸酰胺、以及芥酸酰胺中的1种以上。The compound having an amide bond preferably includes one or more selected from the group consisting of lauric acid amide, myristic acid amide, stearic acid amide, behenic acid amide, and erucic acid amide.
相对于上述聚合物成分100质量份，聚合物组合物中的润滑剂的含量优选为0.05质量份以上、更优选为0.1质量份以上、进一步优选为0.5质量份以上。通过使聚合物组合物中的润滑剂的含量相对于聚合物成分100质量份为0.05质量份以上，具有单丝的润滑性优异的优点。The content of the lubricant in the polymer composition is preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, and further preferably 0.5 parts by mass or more relative to 100 parts by mass of the polymer component. When the content of the lubricant in the polymer composition is 0.05 parts by mass or more relative to 100 parts by mass of the polymer component, there is an advantage that the lubricity of the monofilament is excellent.
另外，相对于聚合物成分100质量份，聚合物组合物中的润滑剂的含量优选为12质量份以下、更优选为10质量份以下、进一步优选为8质量份以下、最优选为5质量份以下。通过使聚合物组合物中的润滑剂的含量相对于聚合物成分100质量份为12质量份以下，具有能够抑制润滑剂渗出至复丝的表面的优点。In addition, the content of the lubricant in the polymer composition is preferably 12 parts by mass or less, more preferably 10 parts by mass or less, further preferably 8 parts by mass or less, and most preferably 5 parts by mass or less, relative to 100 parts by mass of the polymer component. When the content of the lubricant in the polymer composition is 12 parts by mass or less relative to 100 parts by mass of the polymer component, there is an advantage that the lubricant can be suppressed from seeping out to the surface of the multifilament.
上述单丝的纤度为1.0～5.0dtex。The monofilament has a fineness of 1.0 to 5.0 dtex.
上述单丝的纤度优选超过1.0dtex、更优选为1.5dtex以上。The fineness of the monofilament is preferably greater than 1.0 dtex, more preferably 1.5 dtex or more.
上述单丝的纤度优选为4.7dtex以下、更优选为4.5dtex以下。The fineness of the monofilament is preferably 4.7 dtex or less, more preferably 4.5 dtex or less.
在本实施方式中，单丝的纤度是指丝的粗细，定义为每单位长度的质量。以平均每10000m的质量(g)为单位(dtex)表示。具体而言，可通过自动振动仪法进行测定。In the present embodiment, the fineness of a single yarn refers to the thickness of the yarn, and is defined as the mass per unit length. It is expressed in units of mass (g) per 10,000 m (dtex). Specifically, it can be measured by an automatic vibrometer method.
上述单丝的拉伸强度为2.5cN/dtex以上。The tensile strength of the monofilament is 2.5 cN/dtex or more.
上述单丝的拉伸强度优选为2.6cN/dtex以上。The tensile strength of the monofilament is preferably 2.6 cN/dtex or more.
上述单丝的拉伸强度越大越优选，上述单丝的拉伸强度例如为10cN/dtex以下。The larger the tensile strength of the monofilament is, the more preferable it is. The tensile strength of the monofilament is, for example, 10 cN/dtex or less.
上述单丝的拉伸强度只要为不损害根据用途所要求的柔软性及坚韧性的范围即可，没有特别限定，可以为10cN/dtex以下。The tensile strength of the monofilament is not particularly limited as long as it is within a range that does not impair the flexibility and toughness required for the intended use, and may be 10 cN/dtex or less.
单丝的拉伸强度可以基于JIS L 1015:2010化学纤维短纤维试验方法以初始长度20mm、速度20mm/min进行测定。The tensile strength of a single yarn can be measured based on JIS L 1015:2010 Testing methods for chemical staple fibers at an initial length of 20 mm and a speed of 20 mm/min.
本实施方式的复丝可以直接单独利用复丝，另外，也可以制成由多根复丝形成的编织物、片而利用。The multifilament of the present embodiment may be used alone as it is, or may be used in the form of a knitted fabric or a sheet formed of a plurality of multifilaments.
另外，本实施方式的复丝可以在海洋环境、陆地环境等中使用。Furthermore, the multifilament yarn of the present embodiment can be used in a marine environment, a land environment, or the like.
本实施方式的复丝可以用于例如渔网、海洋绳索、养殖用的网、钓线、农业用网、人工草坪、沙袋用网、防水片等。沙袋用网可以用于例如护岸工程等。The multifilament of this embodiment can be used for, for example, fishing nets, marine ropes, aquaculture nets, fishing lines, agricultural nets, artificial turf, sandbag nets, waterproof sheets, etc. The sandbag net can be used for, for example, shore protection projects, etc.
＜＜短纤维＞＞＜＜Short Fiber＞＞
本实施方式的短纤维是将本实施方式的复丝切断而成的短纤维。The short fibers of the present embodiment are short fibers obtained by cutting the multifilaments of the present embodiment.
本实施方式的短纤维具有卷曲结构。换言之，本实施方式的短纤维为卷缩纱(クリンプ糸)。The staple fibers of the present embodiment have a crimped structure. In other words, the staple fibers of the present embodiment are crimped yarns.
本实施方式的短纤维的长度的平均值为200mm以下，只要为200mm以下即可，没有特别限定，可以与使用短纤维的用途相应地适当设定。The average length of the short fibers of the present embodiment is 200 mm or less, and is not particularly limited as long as it is 200 mm or less, and can be appropriately set according to the purpose for which the short fibers are used.
从易于用于各种用途的观点考虑，本实施方式的短纤维的长度的平均值优选为160mm以下，更具体而言为1.0～100mm。From the viewpoint of easy use in various applications, the average value of the length of the short fibers of the present embodiment is preferably 160 mm or less, more specifically 1.0 to 100 mm.
需要说明的是，短纤维的长度的平均值是指通过JIS L1015:2021“化学纤维短纤维试验方法”的“8.4纤维长度”的“8.4.1平均纤维长度”的“c)C法(置换法)”求得的“纤维长度的平均值”。It should be noted that the average value of the length of short fibers refers to the "average value of fiber length" obtained by "c) C method (substitution method)" in "8.4 Fiber length" and "8.4.1 Average fiber length" of JIS L1015:2021 "Testing methods for chemical staple fibers".
本实施方式的短纤维可以制成干式无纺布而利用。The short fibers of this embodiment can be used as dry-laid nonwoven fabric.
该干式无纺布可以用作卫生材料、医用材料、生活材料、防水材料、汽车用内装材料等。具体而言，该干式无纺布可以用于尿布、过滤器、毛巾、擦拭器、纱布、餐巾纸、地毯等。The dry nonwoven fabric can be used as sanitary materials, medical materials, living materials, waterproof materials, automotive interior materials, etc. Specifically, the dry nonwoven fabric can be used for diapers, filters, towels, wipers, gauze, napkins, carpets, etc.
＜＜复丝的制造方法＞＞＜＜Method for producing multifilament yarn＞＞
本实施方式的复丝的制造方法是通过熔融纺丝法使用具有多个喷丝孔的纺丝喷嘴来制造具备多根单丝的复丝的方法。The method for producing a multifilament according to the present embodiment is a method for producing a multifilament including a plurality of single filaments by a melt spinning method using a spinning nozzle having a plurality of spinneret holes.
另外，本实施方式的复丝的制造方法具备：工序(A)，通过将熔融物从多个上述喷丝孔喷出，得到多根熔融状态的原丝；工序(B)，通过向熔融状态的多根上述原丝喷吹3～15℃的气体，将多根上述原丝冷却；工序(C)，通过利用拉伸辊部将冷却后的多根上述原丝进行拉伸，得到上述复丝。In addition, the method for producing a multifilament yarn of the present embodiment comprises: a step (A) of obtaining a plurality of molten yarns by ejecting a melt from the plurality of spinneret holes; a step (B) of cooling the plurality of molten yarns by blowing a gas at 3 to 15° C. onto the plurality of molten yarns; and a step (C) of obtaining the multifilament yarn by stretching the cooled plurality of molten yarns using a stretching roller section.
上述熔融物含有聚(3-羟基烷酸酯)类树脂及聚己内酯。The melt contains a poly(3-hydroxyalkanoate)-based resin and polycaprolactone.
上述单丝的纤度为1.0～5.0dtex。The monofilament has a fineness of 1.0 to 5.0 dtex.
另外，上述单丝的拉伸强度优选为2.5cN/dtex以上。Furthermore, the tensile strength of the monofilament is preferably 2.5 cN/dtex or more.
在上述工序(A)中，上述熔融物是上述聚合物组合物处于熔融状态的物质。In the step (A), the melt is a product in which the polymer composition is in a molten state.
＜第1实施方式：后拉伸法(逐次拉伸法)＞<First embodiment: post-stretching method (sequential stretching method)>
以下，举出通过后拉伸法(也称为“逐次拉伸法”)制造复丝的方法作为例子，参照图1、2对第1实施方式的复丝的制造方法进行说明。Hereinafter, a method for producing a multifilament by a post-drawing method (also referred to as a “sequential drawing method”) will be described as an example, and the method for producing a multifilament according to the first embodiment will be described with reference to FIGS. 1 and 2 .
在第1实施方式的复丝的制造方法中，利用原丝用卷取辊部卷取被上述气体冷却的多根上述原丝，利用上述拉伸辊部将在该原丝用卷取辊部被卷取的多根上述原丝进行拉伸。In the method for producing a multifilament yarn according to the first embodiment, the plurality of yarns cooled by the gas are wound up by the yarn winding roller section, and the plurality of yarns wound up by the yarn winding roller section are stretched by the stretching roller section.
(工序(A))(Process (A))
如图1所示，在上述工序(A)中，首先将上述熔融物的材料投入至材料投入部101。As shown in FIG. 1 , in the step (A), first, the material of the melt is introduced into the material introduction part 101 .
接着，通过利用混炼挤出机102将从该材料投入部101投入的材料进行加热并进行混炼，得到上述熔融物。Next, the material introduced from the material introduction part 101 is heated and kneaded by the kneading extruder 102 to obtain the above-mentioned melt.
上述混炼挤出机102为螺杆挤出机。该混炼挤出机102可以为单螺杆挤出机，也可以为双螺杆挤出机。The mixing extruder 102 is a screw extruder, which can be a single screw extruder or a twin screw extruder.
然后，使用具有多个喷丝孔的纺丝喷嘴104，将利用上述混炼挤出机102得到的熔融物从多个上述喷丝孔喷出，从而得到多根熔融状态的原丝100A。Then, the melt obtained by the kneading extruder 102 is ejected from the plurality of spinning holes using a spinning nozzle 104 having a plurality of spinning holes, thereby obtaining a plurality of molten raw fibers 100A.
需要说明的是，从纺丝喷嘴104的多个喷丝孔喷出的熔融物的流量通过齿轮泵103进行调整。It should be noted that the flow rate of the melt discharged from the plurality of spinning holes of the spinning nozzle 104 is adjusted by the gear pump 103 .
上述纺丝喷嘴104的温度例如为160～180℃。The temperature of the spinning nozzle 104 is, for example, 160 to 180°C.
上述喷丝孔的形状、大小及孔数没有特别限定。作为喷丝孔的大小，例如，在喷丝孔的形状为圆形的情况下，优选喷丝孔的直径为0.1mm～3.0mm。另外，喷丝孔的孔数取决于喷丝孔的大小，例如可以为15个以上，可以为1000个以下。The shape, size and number of the spinneret holes are not particularly limited. As for the size of the spinneret holes, for example, when the shape of the spinneret holes is circular, the diameter of the spinneret holes is preferably 0.1 mm to 3.0 mm. In addition, the number of the spinneret holes depends on the size of the spinneret holes, and for example, it can be 15 or more, or 1000 or less.
纺丝喷嘴流速、即熔融物从纺丝喷嘴104被喷出的速度优选为0.05m/min～20m/min、更优选为1.0m/min～10m/min、进一步优选为0.5m/min～5.0m/min。The spinning nozzle flow rate, that is, the speed at which the melt is ejected from the spinning nozzle 104 is preferably 0.05 m/min to 20 m/min, more preferably 1.0 m/min to 10 m/min, and further preferably 0.5 m/min to 5.0 m/min.
熔融物从纺丝喷嘴104的喷丝孔被喷出的喷出量优选为0.10g/min/hole以上、更优选为0.15g/min/hole以上。另外，该喷出量优选小于1.0g/min/hole、更优选为0.90g/min/hole以下。The melt is discharged from the spinning hole of the spinning nozzle 104 at an amount of preferably 0.10 g/min/hole or more, more preferably 0.15 g/min/hole or more. The discharge amount is preferably less than 1.0 g/min/hole, more preferably 0.90 g/min/hole or less.
(工序(B))(Process (B))
在上述工序(B)中，通过向上述工序(A)中得到的熔融状态的多根上述原丝100A喷吹3～15℃的气体，将多根上述原丝100A进行冷却。In the step (B), the plurality of raw yarns 100A are cooled by blowing a gas at 3 to 15° C. to the plurality of raw yarns 100A in a molten state obtained in the step (A).
在上述工序(B)中，通过利用3～15℃的气体将上述原丝100A冷却，能够缩短达到构成原丝100A的聚己内酯及聚(3-羟基烷酸酯)类树脂发生结晶化的温度范围内的时间，可以抑制聚己内酯及聚(3-羟基烷酸酯)类树脂结晶化的进行。由此，能够抑制原丝100A变硬。因此，易于实施上述工序(C)中的原丝100A的拉伸。其结果是易于提高复丝的强度。In the above step (B), by cooling the above-mentioned original yarn 100A with gas at 3 to 15°C, the time to reach the temperature range where the polycaprolactone and poly(3-hydroxyalkanoate) resin constituting the original yarn 100A crystallizes can be shortened, and the crystallization of the polycaprolactone and poly(3-hydroxyalkanoate) resin can be suppressed. As a result, the original yarn 100A can be suppressed from becoming hard. Therefore, it is easy to perform the stretching of the original yarn 100A in the above step (C). As a result, the strength of the multifilament can be easily improved.
在第1实施方式中，在第1冷却箱105内利用3～15℃的气体将上述原丝100A进行冷却，在第2冷却箱106内利用3～15℃的气体将在该第1冷却箱105内被冷却后的原丝100A进行冷却。In the first embodiment, the yarn 100A is cooled in the first cooling box 105 using gas at 3 to 15° C., and the yarn 100A cooled in the first cooling box 105 is cooled in the second cooling box 106 using gas at 3 to 15° C.
向上述工序(A)中得到的熔融状态的多根上述原丝100A喷吹的气体的温度为3～15℃、优选为3.0～6.0℃。The temperature of the gas blown toward the plurality of molten raw fibers 100A obtained in the step (A) is 3 to 15°C, preferably 3.0 to 6.0°C.
需要说明的是，“向上述工序(A)中得到的熔融状态的多根上述原丝100A喷吹的气体的温度”是指上述气体接触上述原丝100A时的上述气体的温度。It should be noted that “the temperature of the gas blown toward the plurality of molten yarns 100A obtained in the step (A)” refers to the temperature of the gas when the gas contacts the molten yarns 100A.
向上述工序(A)中得到的熔融状态的多根上述原丝100A喷吹的气体的速度没有特别限定，优选为0.1m/s以上且5m/s以下、更优选为0.1m/s以上且3m/s以下。The speed of the gas blown toward the plurality of molten raw fibers 100A obtained in the step (A) is not particularly limited, but is preferably 0.1 m/s to 5 m/s, and more preferably 0.1 m/s to 3 m/s.
通过使上述气体的速度为0.1m/s以上，易于发挥气体的冷却效果。By setting the velocity of the gas to be 0.1 m/s or more, the cooling effect of the gas can be easily exerted.
通过使上述气体的速度为5m/s以下，能够抑制从纺丝喷嘴104喷出的熔融状态的原丝100A因气体而摆动。其结果是，可以抑制熔融状态的原丝100A彼此发生熔粘和/或断丝等，即，纺丝稳定性提高。By setting the gas velocity to 5 m/s or less, the molten yarn 100A ejected from the spinning nozzle 104 can be prevented from oscillating due to the gas. As a result, the molten yarns 100A can be prevented from fusing and/or breaking, that is, the spinning stability can be improved.
需要说明的是，“向上述工序(A)中得到的熔融状态的多根上述原丝100A喷吹的气体的速度”是指上述气体接触上述原丝100A时的上述气体的速度。It should be noted that “the speed of the gas blown toward the plurality of the molten yarns 100A obtained in the step (A)” refers to the speed of the gas when the gas contacts the filaments 100A.
作为上述气体，可以列举空气、非活性气体(氮气、氩气等)等。Examples of the gas include air, inert gas (nitrogen, argon, etc.), and the like.
在上述工序(B)中，利用第1牵引辊部107对用3～15℃的气体冷却后的原丝100A进行牵引。上述第1牵引辊部107由2个辊构成。需要说明的是，第1牵引辊部107可以由1个辊构成，也可以由3个以上的辊构成。In the step (B), the original yarn 100A cooled by the gas at 3 to 15° C. is pulled by the first pulling roller unit 107. The first pulling roller unit 107 is composed of two rollers. The first pulling roller unit 107 may be composed of one roller or three or more rollers.
而且，在上述工序(B)中，利用原丝用卷取辊部112卷取通过上述第1牵引辊部107进行了牵引的多根原丝100A。Then, in the step (B), the plurality of yarns 100A pulled by the first pulling roller unit 107 are pulled by the yarn pulling roller unit 112 .
在第1实施方式中，使用第1运送辊部108、第2运送辊部109、第3运送辊部110及第4运送辊部111将通过上述第1牵引辊部107进行了牵引的多根原丝100A运送至上述原丝用卷取辊部112。In the first embodiment, the plurality of raw yarns 100A pulled by the first pulling roller unit 107 are fed to the raw yarn winding roller unit 112 using the first feeding roller unit 108 , the second feeding roller unit 109 , the third feeding roller unit 110 , and the fourth feeding roller unit 111 .
虽然在图1中各运送辊部由2个辊构成，但也可以由1个辊构成，还可以由3个以上的辊构成。Although each transport roller portion is composed of two rollers in FIG. 1 , it may be composed of one roller, or may be composed of three or more rollers.
在上述工序(B)中，将多根上述原丝100A优选冷却至50℃以下、更优选冷却至40℃以下。在上述工序(B)中，将多根上述原丝100A冷却至例如0℃以上，更具体而言，冷却至10℃以上。In the step (B), the plurality of yarns 100A are cooled preferably to 50° C. or lower, more preferably to 40° C. or lower. In the step (B), the plurality of yarns 100A are cooled to, for example, 0° C. or higher, more specifically, 10° C. or higher.
在上述工序(B)中，可以通过3～15℃的气体的喷吹将多根上述原丝冷却至50℃以下。另外，在上述工序(B)中，可以通过3～15℃的气体的喷吹将多根上述原丝100A冷却至一定程度，然后，在将原丝100A从上述第1牵引辊部107运送至上述原丝用卷取辊部112的期间利用周围的空气使其冷却，将多根上述原丝冷却至50℃以下。In the above step (B), the plurality of the above-mentioned raw yarns can be cooled to below 50°C by blowing a gas at 3 to 15°C. In addition, in the above step (B), the plurality of the above-mentioned raw yarns 100A can be cooled to a certain extent by blowing a gas at 3 to 15°C, and then, the raw yarns 100A are cooled by the surrounding air while being transported from the above-mentioned first pulling roller section 107 to the above-mentioned raw yarn winding roller section 112, and the plurality of the above-mentioned raw yarns are cooled to below 50°C.
为了在上述工序(C)中对原丝100A进行拉伸，优选在上述工序(B)中不进行原丝100A的拉伸、或者基本上不进行原丝100A的拉伸。In order to stretch the original yarn 100A in the step (C), it is preferred that the original yarn 100A is not stretched or substantially not stretched in the step (B).
即，上述工序(B)中的拉伸倍率优选为1.5倍以下、更优选为1.2倍以下、进一步优选为1.1倍以下、最优选为1.0倍。需要说明的是，上述工序(B)中的拉伸倍率设为1.0倍以上。That is, the stretching ratio in the step (B) is preferably 1.5 times or less, more preferably 1.2 times or less, further preferably 1.1 times or less, and most preferably 1.0 times. It should be noted that the stretching ratio in the step (B) is set to 1.0 times or more.
上述工序(B)中的拉伸倍率可以通过下述式而求出。The stretching ratio in the step (B) can be calculated by the following formula.
上述工序(B)中的拉伸倍率＝原丝用卷取辊部的速度(m/min)/上述工序(B)中使用的牵引辊部(在第1实施方式中为“第1牵引辊部107”)的速度(m/min)Stretching ratio in the above step (B) = speed of the yarn winding roller unit (m/min) / speed of the pulling roller unit (in the first embodiment, the "first pulling roller unit 107") used in the above step (B) (m/min)
需要说明的是，原丝用卷取辊部的速度(m/min)为被卷取至原丝用卷取辊部的原丝的每单位时间的长度。In addition, the speed (m/min) of the raw yarn winding roller part is the length of the raw yarn wound by the raw yarn winding roller part per unit time.
另外，上述工序(B)中使用的牵引辊部的速度(m/min)为被上述工序(B)中使用的牵引辊部(在第1实施方式中为“第1牵引辊部107”)牵引的原丝的每单位时间的长度。The speed (m/min) of the pulling roller used in the step (B) is the length per unit time of the raw yarn pulled by the pulling roller used in the step (B) (the "first pulling roller 107" in the first embodiment).
在第1实施方式中，上述工序(B)中的拉伸倍率的计算值小于1.0倍时，拉伸倍率设为1.0倍。In the first embodiment, when the calculated value of the stretching ratio in the step (B) is less than 1.0 times, the stretching ratio is set to 1.0 times.
(工序(C))(Process (C))
如图2所示，在上述工序(C)中，将上述工序(B)中被冷却至50℃以下的多根上述原丝100A进行加热，利用上述拉伸辊部114进行拉伸。As shown in FIG. 2 , in the step (C), the plurality of original yarns 100A cooled to 50° C. or less in the step (B) are heated and stretched by the stretching roller unit 114 .
在上述工序(C)中，通过使多根上述原丝100A拉伸，可以提高原丝中包含的聚合物成分的取向性，由此，能够提高原丝的拉伸强度。其结果是，能够提高复丝的强度。In the step (C), by stretching the plurality of raw yarns 100A, the orientation of the polymer components contained in the raw yarns can be improved, thereby increasing the tensile strength of the raw yarns. As a result, the strength of the multifilament yarn can be increased.
这里，为了提高聚合物成分的取向性，优选以适合提高聚合物成分的取向性的温度范围进行拉伸。这是由于，在以高于该温度范围的温度将原丝进行拉伸时，聚合物成分处于熔融状态，其结果是，即使进行拉伸，聚合物成分的取向性也基本上不会提高。另外，这是由于，在以低于该温度范围的温度将原丝进行拉伸时，聚合物成分过度凝固，原丝变得难以拉伸，而且，即使在想要拉伸原丝而将原丝强行进行拉伸时，原丝会断裂而无法制造复丝。Here, in order to improve the orientation of the polymer component, it is preferred to stretch it in a temperature range suitable for improving the orientation of the polymer component. This is because when the precursor is stretched at a temperature higher than this temperature range, the polymer component is in a molten state, and as a result, even if it is stretched, the orientation of the polymer component is basically not improved. In addition, this is because when the precursor is stretched at a temperature lower than this temperature range, the polymer component is excessively coagulated, and the precursor becomes difficult to stretch, and even if the precursor is forcibly stretched when it is desired to stretch the precursor, the precursor will break and it is impossible to produce a multifilament.
在第1实施方式中，通过将上述工序(B)中被冷却至50℃以下的多根上述原丝100A加热并利用上述拉伸辊部114进行拉伸，与利用周围的空气将多根原丝冷却并拉伸的旋转抽伸法相比，在将多根原丝进行拉伸时，容易调整多根原丝的温度，以使其达到适合提高聚合物成分的取向性的温度范围内，其结果是，易于提高多根原丝的聚合物成分的取向性。In the first embodiment, the plurality of the above-mentioned original yarns 100A cooled to below 50° C. in the above-mentioned step (B) are heated and stretched using the above-mentioned stretching roller section 114. Compared with the rotary drawing method in which the plurality of original yarns are cooled and stretched using the surrounding air, it is easy to adjust the temperature of the plurality of original yarns when stretching the plurality of original yarns so that they reach a temperature range suitable for improving the orientation of the polymer component. As a result, it is easy to improve the orientation of the polymer component of the plurality of original yarns.
因此，在第1实施方式中，易于提高复丝的强度。Therefore, in the first embodiment, it is easy to increase the strength of the multifilament.
上述工序(C)中使用的原丝的纤度优选为5.0～15.0dtex、更优选为6.0～10dtex。The fineness of the raw yarn used in the step (C) is preferably 5.0 to 15.0 dtex, more preferably 6.0 to 10 dtex.
需要说明的是，对于上述工序(C)中使用的原丝的纤度，以下的关系式大致成立。In addition, with respect to the fineness of the raw yarn used in the above step (C), the following relationship is substantially established.
上述工序(C)中使用的原丝的纤度(dtex)＝(((a×1000/60)/b×10000)/c)/dThe fineness (dtex) of the raw yarn used in the above step (C) = (((a×1000/60)/b×10000)/c)/d
a：从上述纺丝喷嘴104喷出的上述熔融物的量(kg/h)a: The amount of the melt ejected from the spinning nozzle 104 (kg/h)
b：上述工序(B)中使用的牵引辊部(在第1实施方式中为“第1牵引辊部107”)的速度(m/min)b: Speed (m/min) of the pulling roller unit (“first pulling roller unit 107” in the first embodiment) used in the step (B)
c：上述纺丝喷嘴104所具有的喷丝孔的数量(个)c: The number of spinneret holes of the spinning nozzle 104 (pieces)
d：上述工序(B)中的拉伸倍率(-)d: stretching ratio in the above step (B) (-)
因此，通过调整上述b等，可以调整上述工序(C)中使用的原丝的纤度。Therefore, by adjusting the above-mentioned b and the like, the fineness of the raw yarn used in the above-mentioned step (C) can be adjusted.
在上述工序(C)中，利用第2牵引辊部113对用上述原丝用卷取辊部112卷取的多根上述原丝进行牵引。In the step (C), the plurality of yarns wound by the yarn winding roller unit 112 are pulled by the second pulling roller unit 113 .
接着，在上述工序(C)中，利用上述拉伸辊部114将用上述第2牵引辊部113牵引的原丝100A进行拉伸。Next, in the step (C), the yarn 100A pulled by the second pulling roller unit 113 is pulled by the pulling roller unit 114 .
然后，在上述工序(C)中，利用复丝用卷取辊部116将得到的复丝进行卷取。Then, in the above-mentioned step (C), the obtained multifilament is wound up by the multifilament winding roller unit 116 .
另外，在上述工序(C)中，可以利用引出辊(take off roll)部115对用上述拉伸辊部114拉伸的原丝100A进行运送。In the step (C), the raw yarn 100A stretched by the stretching roller unit 114 may be conveyed by a take-off roll unit 115 .
上述第2牵引辊部113由2个辊构成。需要说明的是，第2牵引辊部113可以由1个辊构成，也可以由3个以上的辊构成。The second pulling roller unit 113 is composed of two rollers. It should be noted that the second pulling roller unit 113 may be composed of one roller or may be composed of three or more rollers.
在上述工序(C)中，优选利用上述第2牵引辊部113对多根上述原丝100A进行加热。In the step (C), the plurality of raw yarns 100A are preferably heated by the second pulling roller unit 113 .
在上述工序(C)中，通过利用上述第2牵引辊部113对多根上述原丝100A进行加热，容易调整多根原丝100A的温度，以使其达到适合提高多根原丝100A中包含的聚合物成分的取向性的温度范围内，其结果是，易于提高多根原丝100A的聚合物成分的取向性。In the above-mentioned process (C), by utilizing the above-mentioned second pulling roller portion 113 to heat the plurality of the above-mentioned original yarns 100A, it is easy to adjust the temperature of the plurality of original yarns 100A so that it reaches a temperature range suitable for improving the orientation of the polymer components contained in the plurality of original yarns 100A. As a result, it is easy to improve the orientation of the polymer components of the plurality of original yarns 100A.
上述第2牵引辊部113的温度优选为25℃以上且低于50℃、更优选为30～45℃。The temperature of the second pulling roller unit 113 is preferably 25°C or higher and lower than 50°C, more preferably 30 to 45°C.
需要说明的是，在实施上述工序(C)的环境的温度为25℃以上的情况下，可以利用上述第2牵引辊部113对多根上述原丝100A进行加热。In addition, when the temperature of the environment in which the step (C) is performed is 25° C. or higher, the plurality of raw yarns 100A may be heated by the second pulling roller unit 113 .
上述拉伸辊部114由2个辊构成。需要说明的是，拉伸辊部114可以由1个辊构成，也可以由3个以上的辊构成。The stretching roller unit 114 is composed of two rollers. It should be noted that the stretching roller unit 114 may be composed of one roller or may be composed of three or more rollers.
在上述工序(C)中，对于多根上述原丝100A，可以用上述拉伸辊部114加热，也可以不加热。即，在第1实施方式中，拉伸辊部114可以兼作热处理辊。In the step (C), the plurality of raw yarns 100A may or may not be heated by the stretching roller unit 114. That is, in the first embodiment, the stretching roller unit 114 may also serve as a heat treatment roller.
在上述工序(C)中，也可以使用通过利用上述拉伸辊部114对多根上述原丝100A进行加热而促进多根原丝100A中包含的聚合物成分的结晶化的方法。In the step (C), a method of promoting crystallization of the polymer component included in the plurality of original yarns 100A by heating the plurality of original yarns 100A using the stretching roller unit 114 may be used.
上述拉伸辊部(热处理辊部)114的温度优选为40～100℃、更优选为50～90℃。The temperature of the stretching roller unit (heat treatment roller unit) 114 is preferably 40 to 100°C, more preferably 50 to 90°C.
在第1实施方式中，优选引出辊115兼作热处理辊。In the first embodiment, it is preferable that the take-out roll 115 also serves as a heat treatment roll.
上述引出辊115(热处理辊部115)由2个辊构成。需要说明的是，上述引出辊115(热处理辊部115)可以由1个辊构成，也可以由3个以上的辊构成。The above-mentioned take-out roller 115 (heat treatment roller part 115) is composed of two rollers. It should be noted that the above-mentioned take-out roller 115 (heat treatment roller part 115) may be composed of one roller, or may be composed of three or more rollers.
即，在上述工序(C)中，通过利用热处理辊部115对经拉伸后的多根上述原丝100A进行加热，得到上述复丝。That is, in the step (C), the plurality of drawn original yarns 100A are heated by the heat treatment roll unit 115 to obtain the multifilament yarn.
在上述工序(C)中，通过利用上述热处理辊部115对多根上述原丝100A进行加热，可以促进多根原丝100A中包含的聚合物成分的结晶化。In the step (C), the heat treatment roller 115 heats the plurality of yarns 100A, thereby promoting crystallization of the polymer components included in the plurality of yarns 100A.
上述引出辊(热处理辊部)115的温度优选为40～100℃、更优选为50～90℃。The temperature of the take-out roll (heat treatment roll portion) 115 is preferably 40 to 100°C, more preferably 50 to 90°C.
需要说明的是，上述拉伸辊部114及上述引出辊部115中的两者或仅任一者可以为热处理辊部。It should be noted that both or only one of the stretching roller unit 114 and the take-out roller unit 115 may be a heat treatment roller unit.
上述工序(C)中的拉伸倍率优选为2.0倍以上。上述工序(C)中的拉伸倍率例如为10.0倍以下。The stretching ratio in the step (C) is preferably 2.0 times or more. The stretching ratio in the step (C) is, for example, 10.0 times or less.
通过使上述工序(C)中的拉伸倍率为2.0倍以上，多根原丝100A的聚合物成分的取向性进一步提高。By setting the stretching ratio in the step (C) to 2.0 times or more, the orientation of the polymer components of the plurality of original yarns 100A is further improved.
上述工序(C)中的拉伸倍率可以通过下述式求出。The stretching ratio in the step (C) can be calculated by the following formula.
上述工序(C)中的拉伸倍率＝复丝用卷取辊部的速度(m/min)/上述工序(C)中使用的牵引辊部(在第1实施方式中为“第2牵引辊部113”)的速度(m/min)Stretching ratio in the above step (C) = speed of the multifilament winding roller unit (m/min) / speed of the pulling roller unit (in the first embodiment, the "second pulling roller unit 113") used in the above step (C) (m/min)
在上述工序(C)中，通过下述式求出的松弛率优选为5～15％。In the step (C), the relaxation rate determined by the following formula is preferably 5 to 15%.
松弛率(％)＝((上述拉伸辊部114的速度-上述复丝用卷取辊部116的速度)/上述复丝用卷取辊部116的速度)×100Relaxation rate (%) = ((speed of the stretching roller 114 - speed of the multifilament winding roller 116) / speed of the multifilament winding roller 116) × 100
需要说明的是，复丝用卷取辊部的速度(m/min)为被卷取至复丝用卷取辊部的多根原丝的每单位时间的长度。In addition, the speed (m/min) of the multifilament winding roller section is the length per unit time of the plurality of original yarns wound by the multifilament winding roller section.
另外，上述工序(C)中使用的牵引辊部的速度(m/min)为被上述工序(C)中使用的牵引辊部(在第1实施方式中为“第2牵引辊部113”)牵引的多根原丝的每单位时间的长度。The speed (m/min) of the pulling roller used in the step (C) is the length per unit time of the plurality of original fibers pulled by the pulling roller used in the step (C) (the "second pulling roller 113" in the first embodiment).
此外，上述拉伸辊部的速度(m/min)为在拉伸辊部被运送的多根原丝的每单位时间的长度。The speed (m/min) of the stretching roller section is the length per unit time of the plurality of raw yarns conveyed by the stretching roller section.
虽然在第1实施方式中仅使用1个拉伸辊部，但也可以使用多个拉伸辊部。在使用多个拉伸辊部的情况下，将多个辊中的最高速度作为“拉伸辊部的速度”。Although only one stretching roller unit is used in the first embodiment, a plurality of stretching roller units may be used. When a plurality of stretching roller units are used, the highest speed among the plurality of rollers is defined as the “speed of the stretching roller unit”.
需要说明的是，在图1中的上述工序(B)中，利用原丝用卷取辊部112卷取在上述第1牵引辊部107经过牵引的原丝100A，在第1实施方式中，可以不利用原丝用卷取辊部112卷取在上述第1牵引辊部107经过牵引的原丝100A，而使其容纳于容纳容器中。It should be noted that in the above-mentioned process (B) in Figure 1, the raw yarn 100A that has been pulled by the above-mentioned first pulling roller portion 107 is wound up by the raw yarn winding roller portion 112. In the first embodiment, the raw yarn 100A that has been pulled by the above-mentioned first pulling roller portion 107 can be accommodated in a containing container instead of being wound up by the raw yarn winding roller portion 112.
在不利用原丝用卷取辊部112卷取在上述第1牵引辊部107经过牵引的原丝100A而使用运送辊部运送至容纳容器的情况下，上述工序(B)中的拉伸倍率可以通过下述式而求出。When the yarn 100A pulled by the first pulling roller unit 107 is not wound by the yarn winding roller unit 112 but conveyed to the storage container by the conveying roller unit, the stretching ratio in the step (B) can be calculated by the following formula.
拉伸倍率＝运送辊部的速度(m/min)/第1牵引辊部的速度(m/min)Stretching ratio = speed of the conveying roller (m/min) / speed of the first pulling roller (m/min)
运送辊部的速度(m/min)为运送辊部所运送的原丝的每单位时间的长度。The speed (m/min) of the transport roller portion is the length per unit time of the raw yarn transported by the transport roller portion.
在使用多个运送辊部的情况下，将最快的运送辊部的速度用于拉伸倍率的式子。When a plurality of transport rollers are used, the speed of the fastest transport roller is used in the formula of the stretching ratio.
在不仅不使用原丝用卷取辊部112，也不使用运送辊部的情况下，拉伸倍率设为1.0。When neither the yarn winding roller unit 112 nor the conveying roller unit is used, the stretching ratio is set to 1.0.
＜第2实施方式：旋转抽伸法＞<Second embodiment: Rotational stretching method>
接下来，参照图3对第2实施方式进行说明。Next, a second embodiment will be described with reference to FIG. 3 .
需要说明的是，省略与第1实施方式重复的说明，在第2实施方式中没有特别说明的内容为与第1实施方式中说明的内容相同的内容。It should be noted that the description overlapping with the first embodiment is omitted, and the contents not particularly described in the second embodiment are the same as those described in the first embodiment.
第2实施方式的复丝的制造方法是通过旋转抽伸法制造上述复丝的方法。The method for producing a multifilament according to the second embodiment is a method for producing the above-mentioned multifilament by a rotary drawing method.
旋转抽伸法是在1个工序中实施如下工序的方法：通过将熔融物从多个上述喷丝孔喷出而得到多根熔融状态的原丝的工序、以及利用拉伸辊部将多根上述原丝进行拉伸的工序。旋转抽伸法也被称为“SDY法”、“直接纺丝拉伸法”。The rotary drawing method is a method of performing the following steps in one step: a step of obtaining a plurality of molten raw yarns by ejecting a melt from a plurality of the above-mentioned spinnerets, and a step of stretching the plurality of the above-mentioned raw yarns by a stretching roller unit. The rotary drawing method is also called the "SDY method" or the "direct spinning and stretching method".
如图3所示，在第2实施方式的上述工序(C)中，利用牵引辊部207对在工序(B)中被冷却的多根上述原丝进行牵引。As shown in FIG. 3 , in the step (C) of the second embodiment, the plurality of raw fibers cooled in the step (B) are pulled by the pulling roller unit 207 .
接着，利用3个拉伸辊部(第1拉伸辊部208、第2拉伸辊部209及第3拉伸辊部210)对在牵引辊部207经过牵引的多根原丝进行拉伸。Next, the plurality of raw fibers pulled by the pulling roller unit 207 are pulled by three pulling roller units (the first pulling roller unit 208 , the second pulling roller unit 209 , and the third pulling roller unit 210 ).
然后，在上述工序(C)中，利用复丝用卷取辊部212卷取得到的复丝。Then, in the above-mentioned step (C), the obtained multifilament is wound up by the multifilament winding roller unit 212 .
另外，在上述工序(C)中，可以利用引出辊部211运送在上述拉伸辊部经过拉伸的原丝100A。In the step (C), the yarn 100A stretched by the stretching roller section may be conveyed by the take-out roller section 211 .
在上述工序(C)中，利用牵引辊部207对在第1冷却箱105及第2冷却箱106中被冷却的多根上述原丝进行牵引。In the step (C), the plurality of raw fibers cooled in the first cooling box 105 and the second cooling box 106 are pulled by the pulling roller unit 207 .
虽然在图1中牵引辊部207由2个辊构成，但也可以由1个辊构成，还可以由3个以上的辊构成。Although the pulling roller portion 207 is composed of two rollers in FIG. 1 , it may be composed of one roller or may be composed of three or more rollers.
在第2实施方式中，各拉伸辊部可以兼作热处理辊部。In the second embodiment, each stretching roll unit may also serve as a heat treatment roll unit.
虽然在图1中各拉伸辊部208、209、210(各热处理辊208、209、210)由2个辊构成，但也可以由1个辊构成，还可以由3个以上的辊构成。Although each of the stretching roller sections 208 , 209 , and 210 (each of the heat treatment rollers 208 , 209 , and 210 ) is composed of two rollers in FIG. 1 , it may be composed of one roller, or may be composed of three or more rollers.
从促进多根原丝100A中包含的聚合物成分的结晶化的观点考虑，上述热处理辊部的温度优选为25～100℃、更优选为40～90℃。From the viewpoint of promoting crystallization of the polymer component contained in the plurality of original yarns 100A, the temperature of the heat treatment roll section is preferably 25 to 100°C, more preferably 40 to 90°C.
需要说明的是，在实施工序(C)的环境的温度为25℃以上的情况下，即使不使用热处理辊，也能够促进多根原丝100A中包含的聚合物成分的结晶化。In addition, when the temperature of the environment in which the step (C) is performed is 25° C. or higher, the crystallization of the polymer component contained in the plurality of original yarns 100A can be promoted even without using a heat treatment roll.
在本实施方式的复丝的制造方法中，纺丝牵伸比数值(NDR)优选为150以上、更优选为200以上。另外，NDR通常为1000以下。In the method for producing a multifilament yarn of the present embodiment, the spinning draft ratio (NDR) is preferably 150 or more, more preferably 200 or more. In addition, the NDR is usually 1000 or less.
NDR可以通过下述式而求出。NDR can be calculated by the following formula.
NDR＝最初从纺丝喷嘴牵引原丝的牵引辊部(最初的牵引辊部)的速度(m/min)/纺丝喷嘴流速(m/min)NDR = speed of the pulling roller part (initial pulling roller part) that pulls the raw yarn from the spinning nozzle for the first time (m/min) / spinning nozzle flow rate (m/min)
通过使NDR为150以上，可以从纺丝喷嘴至最初的牵引辊部之间进行原丝的拉伸，其结果是能够提高复丝的强度。By setting the NDR to 150 or more, the raw yarn can be stretched from the spinning nozzle to the first drawing roll portion, and as a result, the strength of the multifilament can be increased.
需要说明的是，在第1实施方式(后拉伸法)中，最初的牵引辊部为第1牵引辊部107。In addition, in the first embodiment (post-stretching method), the first pulling roller unit is the first pulling roller unit 107 .
另一方面，在第2实施方式(旋转抽伸法)中，最初的牵引辊部为牵引辊部207。On the other hand, in the second embodiment (rotational drawing method), the first pulling roller section is the pulling roller section 207 .
＜短纤维的制造方法＞＜Method for producing short fibers＞
对于本实施方式的短纤维的制造方法而言，通过本实施方式的复丝的制造方法得到上述复丝，并将该复丝切断，从而得到短纤维。In the method for producing short fibers according to the present embodiment, the multifilament yarn described above is obtained by the method for producing a multifilament yarn according to the present embodiment, and the multifilament yarn is cut to obtain short fibers.
该短纤维具有卷曲结构。The short fibers have a crimped structure.
上述短纤维的长度的平均值为200mm以下、优选为160mm以下，更具体而言为1.0～100mm。The average length of the short fibers is 200 mm or less, preferably 160 mm or less, and more specifically, 1.0 to 100 mm.
本实施方式的短纤维的制造方法通过对复丝进行卷缩加工，并将经过该卷缩加工的复丝切断，从而能够得到具有卷曲结构的短纤维。The method for producing staple fibers according to the present embodiment can obtain staple fibers having a crimped structure by crimping a multifilament and cutting the crimped multifilament.
本实施方式的复丝及其制造方法、以及短纤维及其制造方法如上所述构成，因此具有以下的优点。The multifilament yarn and the method for producing the same, and the staple fiber and the method for producing the same according to the present embodiment are configured as described above, and therefore have the following advantages.
即，本实施方式的复丝具备多根单丝。上述单丝含有聚(3-羟基烷酸酯)类树脂及聚己内酯。上述单丝的纤度为1.0～5.0dtex。上述单丝的拉伸强度为2.5cN/dtex以上。That is, the multifilament of the present embodiment includes a plurality of monofilaments. The monofilaments contain a poly(3-hydroxyalkanoate)-based resin and polycaprolactone. The monofilaments have a fineness of 1.0 to 5.0 dtex. The monofilaments have a tensile strength of 2.5 cN/dtex or more.
本实施方式的复丝通过这样的构成而成为强度高的复丝。The multifilament yarn of the present embodiment has a high strength due to such a configuration.
需要说明的是，从今后适用于多种用途的可能性的观点考虑，会要求强度高、单丝细、并进一步具有良好的生物降解性的复丝。In addition, from the viewpoint of the possibility of application to various uses in the future, multifilaments having high strength, thin single filaments, and good biodegradability are required.
这里，聚己内酯与聚(3-羟基烷酸酯)类树脂同样地具有生物降解性。Here, polycaprolactone is biodegradable like the poly(3-hydroxyalkanoate)-based resin.
另外，通过将单丝的纤度设为5.0dtex以下，使单丝变细。Furthermore, by setting the fineness of the single yarn to 5.0 dtex or less, the single yarn is made thinner.
因此，根据本实施方式，可以提供强度高、单丝细、并进一步具有良好的生物降解性的复丝。Therefore, according to the present embodiment, a multifilament having high strength, thin single yarns, and excellent biodegradability can be provided.
本实施方式的复丝的制造方法是使用具有多个喷丝孔的纺丝喷嘴来制造具备多个单丝的复丝的方法。The method for producing a multifilament according to the present embodiment is a method for producing a multifilament including a plurality of single filaments using a spinning nozzle having a plurality of spinning holes.
另外，本实施方式的复丝的制造方法具备：工序(A)，通过将熔融物从多个上述喷丝孔喷出，得到多根熔融状态的原丝；工序(B)，通过向熔融状态的多根上述原丝喷吹3～15℃的气体，将多根上述原丝冷却；工序(C)，通过利用拉伸辊部将冷却后的多根上述原丝进行拉伸，得到上述复丝。In addition, the method for producing a multifilament yarn of the present embodiment comprises: a step (A) of obtaining a plurality of molten yarns by ejecting a melt from the plurality of spinneret holes; a step (B) of cooling the plurality of molten yarns by blowing a gas at 3 to 15° C. onto the plurality of molten yarns; and a step (C) of obtaining the multifilament yarn by stretching the cooled plurality of molten yarns using a stretching roller section.
上述熔融物含有聚(3-羟基烷酸酯)类树脂及聚己内酯。上述单丝的纤度为1.0～5.0dtex。The melt contains a poly(3-hydroxyalkanoate) resin and polycaprolactone. The monofilament has a fineness of 1.0 to 5.0 dtex.
在上述工序(B)中，通过利用3～15℃的气体将上述原丝冷却，能够缩短达到构成原丝的聚己内酯及聚(3-羟基烷酸酯)类树脂发生结晶化的温度范围内的时间，可以抑制聚己内酯及聚(3-羟基烷酸酯)类树脂的结晶化的进行。由此，能够抑制原丝变硬。因此，容易将上述工序(C)中的原丝充分拉伸。其结果是易于提高复丝的强度。In the above step (B), by cooling the above-mentioned precursor with gas at 3 to 15°C, the time to reach the temperature range where the polycaprolactone and poly(3-hydroxyalkanoate) resin constituting the precursor crystallizes can be shortened, and the crystallization of the polycaprolactone and poly(3-hydroxyalkanoate) resin can be suppressed. Thus, the precursor can be suppressed from becoming hard. Therefore, it is easy to fully stretch the precursor in the above step (C). As a result, the strength of the multifilament can be easily improved.
另外，本实施方式的复丝的制造方法通过在上述工序(C)中利用热处理辊部将被拉伸的多根上述原丝进行加热而得到上述复丝。In addition, the method for producing a multifilament yarn of the present embodiment obtains the multifilament yarn by heating the plurality of drawn raw yarns by a heat treatment roll section in the step (C).
本实施方式的复丝的制造方法通过具有这样的构成，能够提高复丝的结晶度，其结果是能够提高复丝的强度。The method for producing a multifilament according to the present embodiment can improve the crystallinity of the multifilament by having such a configuration, and as a result, can improve the strength of the multifilament.
此外，本实施方式的复丝的制造方法通过上述工序(B)将多根上述原丝冷却至50℃以下，通过上述工序(C)将上述工序(B)中被冷却至50℃以下的多根上述原丝加热并利用上述拉伸辊部进行拉伸。In the method for producing a multifilament yarn of the present embodiment, the plurality of raw yarns are cooled to 50° C. or less in the step (B), and the plurality of raw yarns cooled to 50° C. or less in the step (B) are heated and stretched by the stretching roller unit in the step (C).
这里，为了提高聚合物成分的取向性，通常希望以适合提高聚合物成分的取向性的温度范围进行拉伸。这是由于，在以高于该温度范围的温度拉伸原丝时，聚合物成分处于熔融状态，其结果是，即使拉伸，聚合物成分的取向性也基本上不会提高。另外，这是由于，在以低于该温度范围的温度将原丝进行拉伸时，聚合物成分过度凝固，原丝变得难以拉伸，而且，即使在想要拉伸原丝而将原丝强行进行拉伸时，原丝会断裂而无法制造复丝。Here, in order to improve the orientation of the polymer component, it is usually desired to stretch it in a temperature range suitable for improving the orientation of the polymer component. This is because when the precursor is stretched at a temperature higher than this temperature range, the polymer component is in a molten state, and as a result, even if it is stretched, the orientation of the polymer component is basically not improved. In addition, this is because when the precursor is stretched at a temperature lower than this temperature range, the polymer component is excessively solidified, and the precursor becomes difficult to stretch, and even if the precursor is forcibly stretched when it is desired to stretch the precursor, the precursor will break and it is impossible to produce a multifilament.
在本实施方式中，通过将上述工序(B)中被冷却至50℃以下的多根上述原丝加热并利用上述拉伸辊部进行拉伸，与利用周围的空气将多根原丝冷却并拉伸的旋转抽伸法相比，在将多根原丝进行拉伸时，容易调整多根原丝的温度，以使其达到适合提高聚合物成分的取向性的温度范围内，其结果是，易于提高多根原丝的聚合物成分的取向性。In the present embodiment, the plurality of the above-mentioned original yarns that have been cooled to below 50° C. in the above-mentioned step (B) are heated and stretched using the above-mentioned stretching roller section. Compared with the rotary stretching method in which the plurality of original yarns are cooled and stretched using the surrounding air, it is easy to adjust the temperature of the plurality of original yarns when stretching the plurality of original yarns so that they reach a temperature range suitable for improving the orientation of the polymer components. As a result, it is easy to improve the orientation of the polymer components of the plurality of original yarns.
因此，在本实施方式中，易于提高复丝的强度。Therefore, in this embodiment, it is easy to increase the strength of the multifilament.
需要说明的是，本发明的复丝及其制造方法、以及短纤维及其制造方法并不限定于上述实施方式。另外，本发明的复丝及其制造方法、以及短纤维及其制造方法并不受上述的作用效果的限定。此外，本发明的复丝及其制造方法、以及短纤维及其制造方法可以在不脱离本发明主旨的范围进行各种变更。It should be noted that the multifilament yarn and the method for producing the same, and the staple fiber and the method for producing the same of the present invention are not limited to the above-mentioned embodiments. In addition, the multifilament yarn and the method for producing the same, and the staple fiber and the method for producing the same of the present invention are not limited to the above-mentioned effects. In addition, the multifilament yarn and the method for producing the same, and the staple fiber and the method for producing the same of the present invention can be variously modified within the scope of the present invention.
实施例Example
接下来，列举实施例及比较例对本发明进一步具体地进行说明。需要说明的是，本发明并不受这些实施例的任何限定。Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. It should be noted that the present invention is not limited to these Examples at all.
＜实施例1＞<Example 1>
通过第1实施方式的方法(后拉伸法)制作了复丝。A multifilament yarn was produced by the method (post-drawing method) of the first embodiment.
(工序(A))(Process (A))
首先，如图1所示，将通过混炼挤出机102制作的熔融物从纺丝喷嘴104的喷丝孔喷出，得到了多根(80根)原丝100A。First, as shown in FIG. 1 , a melt produced by a kneading extruder 102 is discharged from a spinning hole of a spinning nozzle 104 to obtain a plurality of (80) raw fibers 100A.
需要说明的是，上述熔融物是按照下述表1的配合比例含有作为聚(3-羟基烷酸酯)类树脂的(3-羟基丁酸酯-共聚-3-羟基己酸酯)共聚树脂(3-羟基己酸酯的比例＝6mol％、Mw＝55万)(P3HB3HH)、聚己内酯(PCL)、作为具有酰胺键的润滑剂的芥酸酰胺、作为具有酰胺键的润滑剂的山嵛酸酰胺、以及作为结晶成核剂的季戊四醇的聚合物组合物。It should be noted that the above-mentioned melt is a polymer composition containing (3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer resin (ratio of 3-hydroxyhexanoate = 6 mol%, Mw = 550,000) (P3HB3HH) as a poly(3-hydroxyalkanoate) resin, polycaprolactone (PCL), erucic acid amide as a lubricant having an amide bond, behenic acid amide as a lubricant having an amide bond, and pentaerythritol as a crystal nucleating agent according to the mixing ratio shown in Table 1 below.
另外，在下述表1中，“具有酰胺键的润滑剂的含量”是具有酰胺键的润滑剂相对于P3HB3HH 100质量份的量(质量份)。“结晶成核剂的含量”是结晶成核剂相对于P3HB3HH 100质量份的量(质量份)。此外，将“质量份”简单表示为“份”。In Table 1 below, "the content of the lubricant having an amide bond" is the amount (parts by mass) of the lubricant having an amide bond relative to 100 parts by mass of P3HB3HH. "The content of the crystallization nucleating agent" is the amount (parts by mass) of the crystallization nucleating agent relative to 100 parts by mass of P3HB3HH. In addition, "parts by mass" is simply expressed as "parts".
(工序(B))(Process (B))
在冷却箱105、106中向多根原丝100A喷吹7℃的空气(淬火空气(quench air))。In the cooling boxes 105 and 106 , air (quench air) at 7° C. is blown toward the plurality of raw yarns 100A.
接着，利用第1牵引辊部107对在冷却箱105、106被冷却的多根原丝100A进行牵引，在多根原丝100A依次通过运送辊部108、109、110、111之后，利用原丝用卷取辊部112卷取多根原丝100A。Next, the plurality of yarns 100A cooled in the cooling boxes 105 and 106 are pulled by the first pulling roller unit 107 , and after the plurality of yarns 100A pass through the conveying roller units 108 , 109 , 110 , and 111 in sequence, the plurality of yarns 100A are wound by the yarn winding roller unit 112 .
利用原丝用卷取辊部112卷取的原丝的纤度为7.6dtex。The fineness of the raw yarn wound by the raw yarn winding roller unit 112 is 7.6 dtex.
需要说明的是，NDR设为353，拉伸倍率设为1.1。It should be noted that the NDR was set to 353 and the stretch ratio was set to 1.1.
(工序(C))(Process (C))
如图2所示，利用第2牵引辊部113(常温(25℃))对经原丝用卷取辊部112进行了卷取的多根原丝(常温(25℃))进行牵引，利用拉伸辊部(热处理辊部)114(60℃)进行拉伸，在多根原丝通过引出辊部(热处理辊部)115(60℃)之后，利用复丝用卷取辊部116卷取得到的复丝。As shown in Figure 2, the second traction roller section 113 (normal temperature (25°C)) is used to pull the multiple original yarns (normal temperature (25°C)) wound by the original yarn winding roller section 112, and the stretching roller section (heat treatment roller section) 114 (60°C) is used to stretch the multiple original yarns. After the multiple original yarns pass through the lead-out roller section (heat treatment roller section) 115 (60°C), the multifilament is wound by the multifilament winding roller section 116.
拉伸倍率设为2.2，松弛率设为10％。The stretching ratio was set to 2.2, and the relaxation ratio was set to 10%.
(实施例2)(Example 2)
通过第2实施方式的方法(SDY法)制作了复丝。A multifilament yarn was produced by the method (SDY method) of the second embodiment.
与实施例1同样地得到了利用冷却箱105、106冷却的多根原丝100A。In the same manner as in Example 1, a plurality of raw yarns 100A cooled by the cooling boxes 105 and 106 were obtained.
接着，如图3所示，利用牵引辊部207对在冷却箱105、106经过冷却的多根原丝100A进行牵引，利用拉伸辊部(热处理辊部)208、209、210(50℃)进行拉伸，在多根原丝通过引出辊部211之后，利用复丝用卷取辊部212卷取得到的复丝。Next, as shown in Figure 3, the multiple original yarns 100A cooled in the cooling boxes 105 and 106 are pulled by the pulling roller section 207, and stretched by the stretching roller sections (heat treatment roller sections) 208, 209, and 210 (50°C). After the multiple original yarns pass through the lead-out roller section 211, the multifilament is wound up by the multifilament winding roller section 212.
NDR设为324，拉伸倍率设为2.0，松弛率设为5％。The NDR was set to 324, the stretch ratio was set to 2.0, and the relaxation rate was set to 5%.
(实施例3、5、7、比较例1)(Examples 3, 5, 7, Comparative Example 1)
如表1所述变更了各条件，除此以外，与实施例1同样地得到了复丝。A multifilament was obtained in the same manner as in Example 1 except that the conditions were changed as shown in Table 1.
(实施例4、6、8、比较例2)(Examples 4, 6, 8, Comparative Example 2)
如表1所述变更了各条件，除此以外，与实施例2同样地得到了复丝。A multifilament was obtained in the same manner as in Example 2 except that the conditions were changed as shown in Table 1.
(单丝的纤度及单丝的拉伸强度)(Single yarn fineness and single yarn tensile strength)
对于实施例及比较例的各复丝，通过上述的方法测定了复丝中的单丝的纤度及单丝的拉伸强度。For each of the multifilaments of Examples and Comparative Examples, the fineness of a single yarn in the multifilament and the tensile strength of the single yarn were measured by the above-mentioned methods.
将单丝的纤度及单丝的拉伸强度示于下述表1。The fineness of the single yarn and the tensile strength of the single yarn are shown in Table 1 below.
(单丝的基质-微区结构)(Matrix-microdomain structure of monofilament)
实施例及比较例的复丝中的单丝的基质-微区结构的有无通过透射电子显微镜(TEM：Transition Electron Microscope)而确认。The presence or absence of the matrix-domain structure of the single yarn in the multifilaments of Examples and Comparative Examples was confirmed by a transmission electron microscope (TEM: Transition Electron Microscope).
另外，利用四氧化钌对实施例及比较例的复丝中的单丝进行染色，通过上述透射电子显微镜对经染色的单丝进行观察，根据染色状态的区别判别了基质及微区各自包含的聚合物。Furthermore, the single fibers in the multifilaments of the examples and comparative examples were dyed with ruthenium tetroxide, and the dyed single fibers were observed using the transmission electron microscope. The polymers contained in the matrix and the microdomains were identified based on the difference in the dyeing state.
将单丝的基质-微区结构的有无、基质中包含的聚合物、以及微区中包含的聚合物示于下述表1。The presence or absence of the matrix-domain structure of the monofilament, the polymer contained in the matrix, and the polymer contained in the domain are shown in Table 1 below.
(单丝的伸长率及单丝的杨氏模量)(Elongation of single yarn and Young's modulus of single yarn)
对于实施例及比较例的各复丝，基于JIS L 1015:2010化学纤维短纤维试验方法，以初始长度20mm、速度20mm/min测定了复丝中的单丝的伸长率及单丝的杨氏模量。For each multifilament of Examples and Comparative Examples, the elongation of a single filament and the Young's modulus of a single filament were measured at an initial length of 20 mm and a speed of 20 mm/min in accordance with JIS L 1015:2010 Testing methods for chemical staple fibers.
将单丝的伸长率及单丝的杨氏模量示于下述表1。The elongation percentage and Young's modulus of the single yarn are shown in Table 1 below.
(熔接率)(Welding rate)
对于实施例及比较例的各复丝，通过以与复丝的长度方向垂直的面切断该复丝，将该复丝中包含的单丝全部切断。Each of the multifilaments of the examples and comparative examples was cut along a plane perpendicular to the longitudinal direction of the multifilament to cut all the single filaments included in the multifilament.
接着，使用扫描电子显微镜(SEM：Scanning Electron Microscope)观察该复丝的切断面，对该切断面中的复丝所包含的单丝的总数和该切断面中与其它单丝熔接在一起的单丝的数量(也是“该复丝所包含的单丝的总数”减去“未与其它单丝熔接的单丝的数量”而得到的数)进行计数。Next, the cut surface of the multifilament is observed using a scanning electron microscope (SEM), and the total number of single filaments included in the multifilament in the cut surface and the number of single filaments fused to other single filaments in the cut surface (also the number obtained by subtracting the "number of single filaments not fused to other single filaments" from the "total number of single filaments included in the multifilament") are counted.
然后，通过下述式求出了熔接率。Then, the fusion rate was calculated by the following formula.
熔接率(％)＝(切断面中与其它单丝熔接在一起的单丝的数量/切断面中的复丝所包含的单丝的总数)×100Fusion rate (%) = (the number of filaments fused to other filaments in the cut surface / the total number of filaments contained in the multifilament in the cut surface) × 100
将熔接率示于下述表1。The fusion rate is shown in Table 1 below.
(耐热性试验)(Heat resistance test)
对于实施例及比较例的各复丝，将复丝中的单丝供于下述条件的热机械分析(TMA：Thermmo Mechanical Analysis)，测定了单丝的收缩率达到5％、10％、20％的温度。For each multifilament of the examples and comparative examples, single yarns in the multifilaments were subjected to thermomechanical analysis (TMA) under the following conditions, and the temperatures at which the shrinkage ratios of the single yarns reached 5%, 10%, and 20% were measured.
负载：3gLoad: 3g
测定气体氛围：AirMeasuring gas atmosphere: Air
温度范围：室温(25℃)～180℃Temperature range: room temperature (25°C) ~ 180°C
升温速度：5℃/minHeating rate: 5℃/min
将耐热性试验的结果(收缩率达到5％、10％、20％的各温度)示于下述表1。The results of the heat resistance test (temperatures at which the shrinkage ratios reached 5%, 10%, and 20%) are shown in Table 1 below.
如表1所示，与未使用聚己内酯的比较例1、2相比，在本发明的范围内的实施例1～8中，单丝的拉伸强度高。As shown in Table 1, in Examples 1 to 8 within the scope of the present invention, the tensile strength of the monofilament was higher than that of Comparative Examples 1 and 2 in which polycaprolactone was not used.
因此可知，即，根据本发明，能够得到强度高的复丝。Therefore, it is understood that, according to the present invention, a multifilament having high strength can be obtained.
另外，如表1所示，与基质包含聚己内酯的实施例7、8相比，在基质包含聚(3-羟基烷酸酯)类树脂的实施例1～6中，达到给定的热收缩率的温度高。Furthermore, as shown in Table 1, in Examples 1 to 6 in which the matrix contained a poly(3-hydroxyalkanoate)-based resin, the temperature at which a given heat shrinkage ratio was reached was higher than in Examples 7 and 8 in which the matrix contained polycaprolactone.
因此可知，基质包含聚(3-羟基烷酸酯)类树脂的复丝的耐热性优异。Therefore, it is understood that the multifilament whose matrix includes a poly(3-hydroxyalkanoate)-based resin has excellent heat resistance.
(比较例3)(Comparative Example 3)
将淬火空气的温度设为25℃，除此以外，与实施例1同样地尝试了复丝的制作，结果是，在纺丝喷嘴104与第1牵引辊107之间原丝发生断裂，无法制作复丝。The production of multifilament yarn was attempted in the same manner as in Example 1 except that the temperature of the quenching air was set to 25° C. However, the raw yarn was broken between the spinning nozzle 104 and the first pulling roller 107 , and the multifilament yarn could not be produced.
(比较例4)(Comparative Example 4)
将淬火空气的温度设为25℃，除此以外，与实施例3同样地尝试了复丝的制作，结果是，在纺丝喷嘴104与第1牵引辊107之间原丝发生断裂，无法制作复丝。The production of multifilament yarn was attempted in the same manner as in Example 3 except that the temperature of the quenching air was set to 25° C. However, the original yarn was broken between the spinning nozzle 104 and the first pulling roller 107 , and the multifilament yarn could not be produced.
(比较例5)(Comparative Example 5)
将淬火空气的温度设为25℃，除此以外，与实施例7同样地尝试了复丝的制作，结果是，在纺丝喷嘴104与第1牵引辊107之间原丝发生断裂，无法制作复丝。The production of multifilament yarn was attempted in the same manner as in Example 7 except that the temperature of the quenching air was set to 25° C. However, the original yarn was broken between the spinning nozzle 104 and the first pulling roller 107, and the multifilament yarn could not be produced.
根据以上结果，在将淬火空气的温度设为25℃的比较例3～5中，在纺丝喷嘴104与第1牵引辊107之间原丝发生断裂，无法制造复丝。From the above results, in Comparative Examples 3 to 5 in which the temperature of the quenching air was set to 25° C., the raw yarn was broken between the spinning nozzle 104 and the first pulling roller 107, and the multifilament yarn could not be produced.
比较例3～5中，降低NDR，则存在能够制造复丝的可能性，但如若这样的话，在对单丝的拉伸受到抑制的状态下，聚合物成分的结晶化会在一定程度上进行。In Comparative Examples 3 to 5, there is a possibility that multifilaments can be produced by reducing the NDR. However, in this case, the crystallization of the polymer component proceeds to a certain extent while the stretching of the single filament is suppressed.
另一方面，在本发明的范围内的实施例1～8中，通过进行对熔融状态的多根原丝喷吹3～15℃的气体的工序(B)，能够在聚合物成分的结晶化进行前进行一定程度的拉伸。可以认为其结果是能够得到强度高的复丝。On the other hand, in Examples 1 to 8 within the scope of the present invention, by performing step (B) of blowing a gas at 3 to 15°C to the molten plurality of raw yarns, it is possible to perform some degree of stretching before the crystallization of the polymer component proceeds. As a result, it is considered that a multifilament with high strength can be obtained.
即可知，根据本发明，能够得到强度高的复丝。That is, it is understood that according to the present invention, a multifilament having high strength can be obtained.
Claims (16)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021053148 | 2021-03-26 | ||
| JP2021-053148 | 2021-03-26 | ||
| PCT/JP2022/010854 WO2022202397A1 (en) | 2021-03-26 | 2022-03-11 | Multifilament, method for manufacturing multifilament, staple, and method for manufacturing staple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117098881A true CN117098881A (en) | 2023-11-21 |
Family
ID=83397113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280024869.2A Pending CN117098881A (en) | 2021-03-26 | 2022-03-11 | Multifilament yarn, method for producing the same, and staple fiber and method for producing the same |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4317554A4 (en) |
| JP (1) | JPWO2022202397A1 (en) |
| CN (1) | CN117098881A (en) |
| WO (1) | WO2022202397A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2024090257A1 (en) * | 2022-10-27 | 2024-05-02 | ||
| EP4667629A1 (en) * | 2023-02-15 | 2025-12-24 | Kaneka Corporation | Multifilament production method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0593316A (en) * | 1991-09-27 | 1993-04-16 | Unitika Ltd | Microorganism degradable conjugate fiber |
| JPH0593317A (en) * | 1991-09-27 | 1993-04-16 | Unitika Ltd | Microorganism degradable conjugate fiber having latently crimping ability |
| JPH06264305A (en) * | 1993-03-09 | 1994-09-20 | Unitika Ltd | Biodegradable fiber and its production |
| US20090112259A1 (en) * | 2007-10-31 | 2009-04-30 | Angiotech Pharmaceuticals, Inc. | Recombinant expressed bioadsorbable polyhydroxyalkonate monofilament and multi-filaments self-retaining sutures |
-
2022
- 2022-03-11 EP EP22775189.8A patent/EP4317554A4/en active Pending
- 2022-03-11 WO PCT/JP2022/010854 patent/WO2022202397A1/en not_active Ceased
- 2022-03-11 JP JP2023509014A patent/JPWO2022202397A1/ja active Pending
- 2022-03-11 CN CN202280024869.2A patent/CN117098881A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4317554A4 (en) | 2025-04-30 |
| JPWO2022202397A1 (en) | 2022-09-29 |
| WO2022202397A1 (en) | 2022-09-29 |
| EP4317554A1 (en) | 2024-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7705380B2 (en) | Manufacturing method of aliphatic polyester fiber | |
| JP3440915B2 (en) | Polylactic acid resin and molded products | |
| US20020150756A1 (en) | Hollow fibers and manufacturing method of hollow fibers | |
| CN117098881A (en) | Multifilament yarn, method for producing the same, and staple fiber and method for producing the same | |
| US20240279848A1 (en) | Undrawn multifilament, method for producing the same, multifilament, method for producing the same, staple, and method for producing the same | |
| US20250283252A1 (en) | Biologically Degradable MULTI-COMPONENT POLYMER FIBRES | |
| CN101476165A (en) | Poly (hydroxybutyrate-hydroxyvalerate) fiber and dry spinning method | |
| WO2023167245A1 (en) | Multifilament and method for producing same | |
| JP2006233375A (en) | Synthetic fiber and fiber structure composed of the same | |
| JP4270734B2 (en) | Method for producing biodegradable fiber having bulkiness | |
| US20250223727A1 (en) | Multifilament and method for producing the same | |
| EP4667629A1 (en) | Multifilament production method | |
| JP2008057082A (en) | Method for producing polylactic acid monofilament | |
| JP2000248426A (en) | Production of aliphatic polyester multifilament | |
| JP2025136573A (en) | Method for producing fibers for drawing and method for producing fibers | |
| JP2024104658A (en) | Monofilament and its manufacturing method | |
| WO2025105082A1 (en) | Fiber and method for producing same | |
| JP2024104657A (en) | fishing line | |
| US20230304192A1 (en) | Prodegradation in nonwovens | |
| WO2025205578A1 (en) | Filament and method for producing same | |
| CN115315545B (en) | Biodegradable polymer fibers made from renewable raw materials | |
| WO2025089095A1 (en) | Fibers and non-woven fabric | |
| Ren | Processing of PLA | |
| WO2024204205A1 (en) | Resin composition for monofilament and use thereof, and method for producing monofilament | |
| WO2025204710A1 (en) | Fiber, method for producing fiber, fiber structure, and method for producing fiber structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |