CN105200564A - Preparation method of recycled polyester staple fiber - Google Patents
Preparation method of recycled polyester staple fiber Download PDFInfo
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- CN105200564A CN105200564A CN201510732851.XA CN201510732851A CN105200564A CN 105200564 A CN105200564 A CN 105200564A CN 201510732851 A CN201510732851 A CN 201510732851A CN 105200564 A CN105200564 A CN 105200564A
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- polyester
- polyurethane
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- 229920000728 polyester Polymers 0.000 title claims abstract description 139
- 239000000835 fiber Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 229920002635 polyurethane Polymers 0.000 claims abstract description 66
- 239000004814 polyurethane Substances 0.000 claims abstract description 66
- 239000004744 fabric Substances 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000002699 waste material Substances 0.000 claims abstract description 29
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229920000147 Styrene maleic anhydride Polymers 0.000 claims abstract description 23
- 238000002074 melt spinning Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000009987 spinning Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 31
- 230000001172 regenerating effect Effects 0.000 claims description 30
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 21
- 239000011496 polyurethane foam Substances 0.000 claims description 21
- 239000008187 granular material Substances 0.000 claims description 18
- 239000003963 antioxidant agent Substances 0.000 claims description 17
- 230000003078 antioxidant effect Effects 0.000 claims description 17
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000012634 fragment Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 230000004927 fusion Effects 0.000 claims description 10
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 9
- -1 polyethylene terephthalate Polymers 0.000 claims description 8
- 230000036760 body temperature Effects 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 7
- 150000008301 phosphite esters Chemical class 0.000 claims description 6
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 5
- AIBRSVLEQRWAEG-UHFFFAOYSA-N 3,9-bis(2,4-ditert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP1OCC2(COP(OC=3C(=CC(=CC=3)C(C)(C)C)C(C)(C)C)OC2)CO1 AIBRSVLEQRWAEG-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229930185605 Bisphenol Natural products 0.000 claims description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- VCAFTIGPOYBOIC-UHFFFAOYSA-N phenyl dihydrogen phosphite Chemical compound OP(O)OC1=CC=CC=C1 VCAFTIGPOYBOIC-UHFFFAOYSA-N 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 10
- 238000002156 mixing Methods 0.000 abstract description 9
- 230000015556 catabolic process Effects 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 8
- 239000000155 melt Substances 0.000 abstract description 2
- 238000007909 melt granulation Methods 0.000 abstract 1
- 239000006261 foam material Substances 0.000 description 14
- 229920004933 Terylene® Polymers 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 7
- 238000011069 regeneration method Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000010128 melt processing Methods 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 229920002334 Spandex Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- VILAVOFMIJHSJA-UHFFFAOYSA-N dicarbon monoxide Chemical compound [C]=C=O VILAVOFMIJHSJA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000005462 imide group Chemical group 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000000269 nucleophilic effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
- 239000010784 textile waste Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
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- Artificial Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of recycled polyester staple fiber. Polyester/polyurethane blended fabric waste is taken as a raw material, a styrene-maleic anhydride copolymer is added to waste blended fabric, pre-melt granulation is performed at the temperature ranging from 190 DEG C to 220 DEG C, and then melt blending and melt spinning are directly performed. Severe thermal degradation of the waste polyester/polyurethane blended fabric is effectively inhibited in the melt blending process, a blend melt with a moderate cross-linked structure and reasonable phase distribution can be obtained, and accordingly, the recycled polyester staple fiber with more excellent mechanical performance can be obtained. The whole recycle process has the remarkable advantages that the process is simple, the procedure is short, the cost is low, and the efficiency is high.
Description
Technical field
The invention belongs to the technical field of regeneration of waste and old polyester textiles, relate to the renovation process of a kind of waste and old polyester/polyurethane BLENDED FABRIC, particularly relate to and a kind ofly add styrene-maleic anhydride copolymer and carry out by mixing in textile waste in polyester/polyurethane the method that pre-fusion granule directly carries out melt blending and melt spinning afterwards.
Background technology
Polyethylene terephthalate (is called for short polyester, PET) be a kind of thermoplastic semi-crystalline's macromolecular material, there is excellent ABRASION RESISTANCE and DIMENSIONAL STABILITY, application widely and chemical fibre and packaging field, its fiber product is commonly called as terylene, be synthetic fiber kind maximum at present, output is 70% of synthetic fiber total output.Along with the lifting of living standard, the characteristic of simple polyester fabric cannot meet the demand of people, therefore by day by day becoming to the chemical fibre blending of different performance and the windy lattice BLENDED FABRIC prepared by manufacturing the main flow taking market.A wherein principal item of the composite fabric of terylene and polyurethane fiber (being commonly called as spandex), has excellent elasticity and intensity, is widely used in the aspect such as sportswear, elastic undergarment panty hose.
BLENDED FABRIC has the advantage of excellent performance, changing style, but it brings very burden to the regeneration of its old and useless article recovery simultaneously.Simple polyester material or polyurethane material, can by realizing regeneration owing to all having thermoplasticity by old and useless article melting reshaping, but this method name can not realize polyester/polyurethane BLENDED FABRIC effective regeneration.Main cause is that the thermal degradation temperature of bi-material and hot melt processing temperature have big difference, wherein the melt-processed of polyester is at 270-290 DEG C, and polyurethane material just start to occur obvious thermal degradation reaction at 220 DEG C, isocyanate group can be discharged rapidly simultaneously, these end groups can accelerate the fracture of ester bond in polyester macromolecule greatly under the melt temperature of polyester, and form the functional group that cannot carry out polycondensation again.Dimension, if directly by the melting of polyester/polyurethane BLENDED FABRIC, will there is serious and irreversible thermal degradation in melt, cannot carry out spinning moulding completely.
It is the focus that chemical fibre industry is paid close attention to that regeneration for waste and old polyester textiles is reclaimed always, but current reclaimed waste and old polyester material mostly is impurities and more easily removes or impurity is at high temperature the waste polyester bottle chip of inertia and cloth foam material, this type of waste material is comparatively single due to composition, and the physics fusion method of high efficiency, low cost can be adopted to regenerate.For the recovery of waste and old polyester/cotton blended fabric, patent of invention CN102558779A adopts ethylene glycol to be regroup after solubility polymerization intermediate is separated with cotton to prepare recycled polyester by polyester alcoholysis again, although this method can realize being separated of polyester and cotton, but the acomia separation realizing polyester/polyurethane, because ethylene glycol at high temperature also can react with polyurethane and produce non-polyester monomelic impurities, and is not easily separated with polyester intermediate.Patent of invention CN1585798A utilizes acid amides series solvent to dissolve polyester component in waste material to realize being separated of polyester and other kind high polymer, but this method operating procedure is more complicated, and efficiency is low, and cost is high.
Summary of the invention
The object of this invention is to provide a kind of preparation method of regenerative polyester staple fiber, be intended to solve polyester/polyurethane BLENDED FABRIC and be total to thermal degradation problems serious in melting process, by adding styrene-maleic anhydride copolymer as polyurethane high-temperature hot degradation inhibitor and out-phase increase-volume promoter, thus the melting regeneration realizing waste and old polyester/polyurethane loomage can be spun, and preparation has the regenerative polyester staple fiber of better mechanical property, is a kind of waste and old polyester material regeneration technology of high-efficiency environment friendly.
The preparation method of a kind of regenerative polyester staple fiber of the present invention, comprises the following steps:
1) waste and old polyester/polyurethane BLENDED FABRIC is carried out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content <100ppm;
2) by polyester/polyurethane BLENDED FABRIC fragment and styrene-maleic anhydride copolymer powder, after phosphite ester kind antioxidant fully mixes, pre-fusion granule is carried out at terylene foam material comminutor at temperature is 190-220 DEG C, granule process assists nitrogen protection, the time of staying of raw material in foam material machine should control at 1-3min, and this process terminates rear acquisition modified poly ester/polyurethane foam material;
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content <100ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning at a certain temperature, prepare regenerative polyester staple fiber, its fibre strength is 3.52-4.15cN/dtex, and elongation at break is 23.5-48.3%.
The preparation method of a kind of regenerative polyester staple fiber as above, in described waste and old polyester/polyurethane BLENDED FABRIC, the content of polyester is 70%-99wt%, the content of polyurethane is 1%-30wt%, the waste material of 30wt% is greater than for polyurethane content in waste and old polyester BLENDED FABRIC, or have particular/special requirement to reclaiming the content of two kinds of components in raw material, ratio can be regulated by adding appropriate waste pure mylar foam material.
The preparation method of a kind of regenerative polyester staple fiber as above, described polyester is polyethylene terephthalate, and polyurethane is one or both the mixture in PAUR or EU.
The preparation method of a kind of regenerative polyester staple fiber as above, in described styrene-maleic anhydride copolymer, maleic anhydride units molar content is 5-15%, the styrene-maleic anhydride copolymer solid particle of described powder to be diameter be 0.05-0.5mm.
The preparation method of a kind of regenerative polyester staple fiber as above, the addition of described styrene-maleic anhydride copolymer powder is the 1-15wt% of polyester/polyurethane BLENDED FABRIC chip mass; The addition of phosphite ester kind antioxidant is the 0.02%-0.4wt% of polyester/polyurethane BLENDED FABRIC chip mass.
The preparation method of a kind of regenerative polyester staple fiber as above, described phosphite ester kind antioxidant is without phenol phosphite antioxidant YIPHOS3010, Ultranox626, one or more compounds in bis-phenol sub-phosphide type antioxidant Irgafos168.
The preparation method of a kind of regenerative polyester staple fiber as above, described spinning screw feed zone temperature is 245-260 DEG C, and compression section temperature is 263-273 DEG C, and homogenizing metering section temperature is 268-280 DEG C, spinning body temperature 268-280 DEG C.
The preparation method of a kind of regenerative polyester staple fiber as above, regenerative polyester staple fiber type is short fiber, its spinning technique is as follows respectively: spinning speed is 800-1500m/min, draft temperature is 70-85 DEG C, preliminary draft multiplying power is 1.02-1.10, and one draft ratio is 1.8-2.5, and two road draft ratio are 1.02-1.1, then be 1.1-11.1dtex through cutting off obtained fiber number, length is the regenerative polyester staple fiber of 30mm-50mm.
The advantage that interpolation styrene-maleic anhydride copolymer powder carries out pre-fusion granule is:
1) styrene-maleic anhydride copolymer and polyurethane and polyester all have good compatibility, and the rational material of Entropy density deviation after obtaining after being conducive to melt blending, ensures the mechanical property of intermingling material.
2) anhydride unit in styrene-maleic anhydride copolymer effectively can suppress the thermal degradation reaction of polyurethane.In polyurethane, topmost functional unit is urethane unit, and the initial temperature of its pyrolysis is only 160 DEG C, the low molecule segment that the primary product of its decomposition reaction is is end group with isocyanate group and hydroxyl, although this reaction has certain invertibity, but because the temperature of polyurethane and polyester blend is high, and impurity is many in waste material, so the irreversible deterioration reaction of generation that will be very fast after this highly active end group of isocyanate group produces, make polyurethane molecular chain that irreversible fracture occur, and discharge the nucleophilic attack of nitrogenous micromolecular compound acceleration to carbonyl carbon in polyester macromolecule chain, and then cause polyester that serious thermal degradation occurs.Therefore the key reducing the serious thermal degradation in melt blending process of waste and old polyester/polyurethane BLENDED FABRIC is how to control the isocyanate group that polyurethane pyrolysis produces at first.Novelty of the present invention by add styrene-maleic anhydride copolymer powder and polyester/polyurethane blending knit first carry out pre-fusion granule at 190-220 DEG C after enter spinning screw melt blending again and can effectively address this problem.First, at 190-220 DEG C of temperature, the pyrolytic reaction speed of polyurethane is comparatively slow, and pyrolysis simultaneously produces terminal isocyanate groups can react the high imide group of generation heat resistance timely with the acid anhydrides in styrene-maleic anhydride copolymer, and form the cross-linked structure of appropriateness, concrete reaction is as follows:
This reaction effectively can solve the deterioration of the high activity isocyanate group that polyurethane pyrolysis produces, suppress the further pyrolysis of polyurethane, and then after ensureing that polyurethane and polyester enter spinning screw, the congruent melting heat endurance of melting at a higher temperature, the formation of appropriate imide cross-linking structure simultaneously also effectively can promote the mechanical property of melting regenerated fiber.In addition, 190-220 DEG C of this temperature range, polyurethane and styrene-maleic anhydride copolymer are all in good melting soft state, polyester is also in the state of easier deformation, therefore the carrying out of reaction and granule can effectively be ensured, also significantly improve material density while promoting polyurethane heat endurance, solve the problem of BLENDED FABRIC screw feed difficulty.
Beneficial effect:
1) preparation method of a kind of regenerative polyester staple fiber of the present invention, can realize directly being total to melt spinning to waste and old polyester/polyurethane BLENDED FABRIC, have simple to operate, technological process is short, cost is low, the advantage that efficiency is high, agrees with twice laid simultaneously, low-carbon (LC) is arranged, the theme of the sustainable developments such as environmental protection.
2) method for melt processing adopting this law to provide effectively can suppress the thermal degradation problems that waste and old polyester/polyurethane BLENDED FABRIC is serious in common melting process, and can obtain and there is appropriately crosslinked structure and the rational blend melt of Entropy density deviation, therefore obtained regenerated fiber has more outstanding mechanical property.
Detailed description of the invention
Below in conjunction with detailed description of the invention, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
1) by waste and old polyester/polyurethane BLENDED FABRIC, (wherein polyester is polyethylene terephthalate, its content is 85% (mass fraction), polyurethane is PAUR, its content is 15% (mass fraction)) carry out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content 99ppm;
2) by polyester/polyurethane BLENDED FABRIC fragment and styrene-maleic anhydride copolymer (wherein maleic anhydride units content is 7% (the mol ratio)) powder (diameier is 0.25mm) accounting for its mass fraction 9%, after the antioxidant YIPHOS3010 accounting for its mass fraction 0.1% fully mixes, pre-fusion granule is carried out at terylene foam material comminutor at temperature is 210 DEG C, granule process assists nitrogen protection, the time of staying of raw material in foam material machine should control at 1min, and this process terminates rear acquisition modified poly ester/polyurethane foam material;
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content 98ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning, prepare regenerative polyester staple fiber, concrete technology is as follows: spinning screw feed zone temperature is 253 DEG C, compression section temperature is 267 DEG C, and homogenizing metering section temperature is 271 DEG C, spinning body temperature 276 DEG C; Spinning speed is 1200m/min, draft temperature 80 DEG C, and preliminary draft multiplying power is 1.10, and one draft ratio is 2.3, two road draft ratio is 1.08, and be then 4.8dtex through cutting off obtained fiber number, length is the recycled polyester short fiber of 45mm.
Stretch method for testing performance GB/T14337-2008 through man-made staple fibres Wella to evaluate prepared recycled polyester short fiber, fibre strength is 3.52cN/dtex, and elongation at break is 45.3%.
Embodiment 2
1) by waste and old polyester/polyurethane BLENDED FABRIC, (wherein polyester is polyethylene terephthalate, its content is 70% (mass fraction), polyurethane is PAUR, its content is 30% (mass fraction)) carry out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content 99ppm;
2) by polyester/polyurethane BLENDED FABRIC fragment and styrene-maleic anhydride copolymer (wherein maleic anhydride units content is 15% (the mol ratio)) powder (diameier is 0.05mm) accounting for its mass fraction 15%, after the antioxidant YIPHOS3010 accounting for its mass fraction 0.02% fully mixes, pre-fusion granule is carried out at terylene foam material comminutor at temperature is 190 DEG C, granule process assists nitrogen protection, the time of staying of raw material in foam material machine should control at 1min, and this process terminates rear acquisition modified poly ester/polyurethane foam material;
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content 97ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning, prepare regenerative polyester staple fiber, concrete technology is as follows: spinning screw feed zone temperature is 245 DEG C, compression section temperature is 263 DEG C, and homogenizing metering section temperature is 268 DEG C, spinning body temperature 268 DEG C; Spinning speed is 800m/min, draft temperature 80 DEG C, and preliminary draft multiplying power is 1.10, and one draft ratio is 2.3, two road draft ratio is 1.05, and be then 11.1dtex through cutting off obtained fiber number, length is the recycled polyester short fiber of 35mm.
Stretch method for testing performance GB/T14337-2008 through man-made staple fibres Wella to evaluate prepared recycled polyester short fiber, fibre strength is 3.72cN/dtex, and elongation at break is 48.3%.
Embodiment 3
1) by waste and old polyester/polyurethane BLENDED FABRIC, (wherein polyester is polyethylene terephthalate, its content is 90% (mass fraction), polyurethane is EU, its content is 10% (mass fraction)) carry out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content 98ppm;
2) by polyester/polyurethane BLENDED FABRIC fragment and styrene-maleic anhydride copolymer (wherein maleic anhydride units content is 5% (the mol ratio)) powder (diameier is 0.3mm) accounting for its mass fraction 5%, after the antioxidant Irgafos168 accounting for its mass fraction 0.15% fully mixes, pre-fusion granule is carried out at terylene foam material comminutor at temperature is 215 DEG C, granule process assists nitrogen protection, the time of staying of raw material in foam material machine should control at 3min, and this process terminates rear acquisition modified poly ester/polyurethane foam material;
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content 97ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning, prepare regenerative polyester staple fiber, concrete technology is as follows: spinning screw feed zone temperature is 255 DEG C, compression section temperature is 268 DEG C, and homogenizing metering section temperature is 275 DEG C, spinning body temperature 278 DEG C; Spinning speed is 1500m/min, draft temperature 85 DEG C, and preliminary draft multiplying power is 1.02, and one draft ratio is 2.5, two road draft ratio is 1.1, and be then 3.2dtex through cutting off obtained fiber number, length is the recycled polyester short fiber of 30mm.
Stretch method for testing performance GB/T14337-2008 through man-made staple fibres Wella to evaluate prepared recycled polyester short fiber, fibre strength is 3.91cN/dtex, and elongation at break is 30.5%.
Embodiment 4
1) by waste and old polyester/polyurethane BLENDED FABRIC, (wherein polyester is polyethylene terephthalate, its content is 95% (mass fraction), polyurethane is EU, its content is 5% (mass fraction)) carry out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content 97ppm;
2) by polyester/polyurethane BLENDED FABRIC fragment and styrene-maleic anhydride copolymer (wherein maleic anhydride units content is 8% (the mol ratio)) powder (diameier is 0.25mm) accounting for its mass fraction 3%, after the antioxidant Irgafos168 accounting for the antioxidant Ultranox626 and 0.2% of its mass fraction 0.2% fully mixes, pre-fusion granule is carried out at terylene foam material comminutor at temperature is 220 DEG C, granule process assists nitrogen protection, the time of staying of raw material in foam material machine should control at 2min, this process terminates rear acquisition modified poly ester/polyurethane foam material,
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content 98ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning, prepare regenerative polyester staple fiber, concrete technology is as follows: spinning screw feed zone temperature is 258 DEG C, compression section temperature is 271 DEG C, and homogenizing metering section temperature is 276 DEG C, spinning body temperature 279 DEG C; Spinning speed is 1350m/min, draft temperature 80 DEG C, and preliminary draft multiplying power is 1.05, and one draft ratio is 1.95, two road draft ratio is 1.05, and be then 2.5dtex through cutting off obtained fiber number, length is the recycled polyester short fiber of 32mm.
Stretch method for testing performance GB/T14337-2008 through man-made staple fibres Wella to evaluate prepared recycled polyester short fiber, fibre strength is 3.96cN/dtex, and elongation at break is 27.3%.
Embodiment 5
1) by waste and old polyester/polyurethane BLENDED FABRIC, (wherein polyester is polyethylene terephthalate, its content is 99% (mass fraction), polyurethane is the mixture of PAUR and EU, its total content is 1% (mass fraction), the mass ratio of PAUR and EU is 1:1) carry out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content 99ppm;
2) by polyester/polyurethane BLENDED FABRIC fragment and styrene-maleic anhydride copolymer (wherein maleic anhydride units content is 5% (the mol ratio)) powder (diameier is 0.5mm) accounting for its mass fraction 1%, after the antioxidant Irgafos168 accounting for the antioxidant Ultranox626 and 0.02% of its mass fraction 0.02% fully mixes, pre-fusion granule is carried out at terylene foam material comminutor at temperature is 220 DEG C, granule process assists nitrogen protection, the time of staying of raw material in foam material machine should control at 1min, this process terminates rear acquisition modified poly ester/polyurethane foam material,
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content 98ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning, prepare regenerative polyester staple fiber, concrete technology is as follows: spinning screw feed zone temperature is 260 DEG C, compression section temperature is 273 DEG C, and homogenizing metering section temperature is 280 DEG C, spinning body temperature 280 DEG C; Spinning speed is 1500m/min, draft temperature 85 DEG C, and preliminary draft multiplying power is 1.02, and one draft ratio is 1.8, two road draft ratio is 1.02, and be then 1.1dtex through cutting off obtained fiber number, length is the recycled polyester short fiber of 50mm.
Stretch method for testing performance GB/T14337-2008 through man-made staple fibres Wella to evaluate prepared recycled polyester short fiber, fibre strength is 4.15cN/dtex, and elongation at break is 23.5%.
Claims (8)
1. a preparation method for regenerative polyester staple fiber, is characterized in that comprising the following steps:
1) waste and old polyester/polyurethane BLENDED FABRIC is carried out pulverizing, cleaning and vacuumize, obtain the polyester/polyurethane BLENDED FABRIC fragment of moisture content <100ppm;
2) after polyester/polyurethane BLENDED FABRIC fragment fully being mixed with styrene-maleic anhydride copolymer powder and phosphite ester kind antioxidant, pre-fusion granule is carried out at temperature is 190-220 DEG C, granule process assists nitrogen protection, time controling is at 1-3min, and this process terminates rear acquisition modified poly ester/polyurethane foam material;
3) modified poly ester/polyurethane foam material is carried out vacuumize, ensure its moisture content <100ppm;
4) dried modified poly ester/polyurethane foam material is sent into spinning screw, carry out melt spinning at a certain temperature, be prepared into regenerative polyester staple fiber, its fibre strength is 3.52-4.15cN/dtex, and elongation at break is 23.5-48.3%.
2. the preparation method of regenerative polyester staple fiber according to claim 1, is characterized in that, in described waste and old polyester/polyurethane BLENDED FABRIC, the content of polyester is 70-99wt%, and the content of polyurethane is 1-30wt%.
3. the preparation method of regenerative polyester staple fiber according to claim 1 and 2, is characterized in that, described polyester is polyethylene terephthalate, and polyurethane is one or both the mixture in PAUR or EU.
4. the preparation method of regenerative polyester staple fiber according to claim 1, it is characterized in that, in described styrene-maleic anhydride copolymer, the molar content of maleic anhydride units is 5-15%, the styrene-maleic anhydride copolymer solid particle of described styrene-maleic anhydride copolymer powder to be diameter be 0.05-0.5mm.
5. the preparation method of regenerative polyester staple fiber according to claim 1, is characterized in that, the addition of described styrene-maleic anhydride copolymer powder is the 1-15wt% of polyester/polyurethane BLENDED FABRIC chip mass; The addition of described phosphite ester kind antioxidant is the 0.02-0.4wt% of polyester/polyurethane BLENDED FABRIC chip mass.
6. the preparation method of regenerative polyester staple fiber according to claim 1, it is characterized in that, described phosphite ester kind antioxidant is without one or more the compound in phenol phosphite antioxidant YIPHOS3010, Ultranox626 or bis-phenol sub-phosphide type antioxidant Irgafos168.
7. the preparation method of regenerative polyester staple fiber according to claim 1, it is characterized in that, described spinning screw feed zone temperature is 245-260 DEG C, and compression section temperature is 263-273 DEG C, homogenizing metering section temperature is 268-280 DEG C, spinning body temperature 268-280 DEG C.
8. the preparation method of regenerative polyester staple fiber according to claim 1, it is characterized in that, described spinning technique is as follows respectively: spinning speed is 800-1500m/min, draft temperature is 70-85 DEG C, preliminary draft multiplying power is 1.02-1.10, and one draft ratio is 1.8-2.5, and two road draft ratio are 1.02-1.1, then be 1.1-11.1dtex through cutting off obtained fiber number, length is the regenerative polyester staple fiber of 30mm-50mm.
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