CN104562437A - High-simulation superfine fiber nylon-polyurethane base cloth and preparation method thereof - Google Patents
High-simulation superfine fiber nylon-polyurethane base cloth and preparation method thereof Download PDFInfo
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- CN104562437A CN104562437A CN201310482338.0A CN201310482338A CN104562437A CN 104562437 A CN104562437 A CN 104562437A CN 201310482338 A CN201310482338 A CN 201310482338A CN 104562437 A CN104562437 A CN 104562437A
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- 239000000835 fiber Substances 0.000 title claims abstract description 49
- 239000004744 fabric Substances 0.000 title claims abstract description 42
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 30
- 239000004814 polyurethane Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000004088 simulation Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 24
- 239000004698 Polyethylene Substances 0.000 claims abstract description 19
- -1 polyethylene Polymers 0.000 claims abstract description 18
- 229920002292 Nylon 6 Polymers 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 229920001778 nylon Polymers 0.000 claims description 19
- 239000004677 Nylon Substances 0.000 claims description 18
- 238000004043 dyeing Methods 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 13
- 238000009991 scouring Methods 0.000 claims description 11
- 206010061592 cardiac fibrillation Diseases 0.000 claims description 9
- 230000002600 fibrillogenic effect Effects 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 7
- 238000009987 spinning Methods 0.000 claims description 7
- 244000137852 Petrea volubilis Species 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 238000001467 acupuncture Methods 0.000 claims description 5
- 238000010186 staining Methods 0.000 claims description 5
- 239000000975 dye Substances 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 239000002649 leather substitute Substances 0.000 description 12
- 229920001410 Microfiber Polymers 0.000 description 8
- 238000005470 impregnation Methods 0.000 description 7
- 239000010985 leather Substances 0.000 description 7
- 229920001684 low density polyethylene Polymers 0.000 description 7
- 239000004702 low-density polyethylene Substances 0.000 description 7
- 239000003658 microfiber Substances 0.000 description 6
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- BJZYYSAMLOBSDY-QMMMGPOBSA-N (2s)-2-butoxybutan-1-ol Chemical compound CCCCO[C@@H](CC)CO BJZYYSAMLOBSDY-QMMMGPOBSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004970 Chain extender Substances 0.000 description 2
- SFVFIFLLYFPGHH-UHFFFAOYSA-M stearalkonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 SFVFIFLLYFPGHH-UHFFFAOYSA-M 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses a piece of high-simulation superfine fiber nylon-polyurethane base cloth and a preparation method thereof. The high-simulation superfine fiber nylon-polyurethane base cloth is prepared from sea-island fiber formed by composite cospinning of nylon 6 and high pressure polyethylene, and a non-woven fabric prepared by a needling method, wherein the weight ratio of nylon 6 to high pressure polyethylene is (35-45): (65-55). The product obtained by the preparation method disclosed by the invention is thick in fleshy feeling, fine and smooth in fold lines and high soft in hand feeling, and is close to the texture of cowhide, so that the product can be widely applied to the field of substituting the cowhide.
Description
Technical field
The present invention relates to ultrathin fiber nylon polyurethane base cloth and preparation method thereof.
Background technology
Ultrathin fiber nylon polyurethane base cloth (be called for short: super fine base cloth) adopts fiber number to be the fabric of island-in-sea type nylon fiber at 4 ~ 7 dawn, makes through spinning, nonwoven fabric processing, polyurethane impregnation, decrement fibrillation, expanding drying and upper wet goods operation.In polyurethane impregnation process, adopt the polyurethane slurry impregnation technology of loose structure, after decrement fibrillation, the islands-in-sea type fibre in end base is become superfine fibre and obtained super fine base cloth.Meanwhile, utilize the features such as nylon ultrafine fiber specific area is large, hydrophily is strong, make microfiber synthetic leather have the moisture-absorption characteristics similar with corium pencil collagenous fibres.And three-dimensional structure and the corium of microfiber synthetic leather are similar, and using nylon ultrafine fiber as skeleton, this makes microfiber synthetic leather all exceed natural leather in physical and mechanical properties, shape-retaining ability, homogeneity, chemical resistance corrosivity, anti-mildew etc.Thus, microfiber synthetic leather is widely used as the substitute products of top grade leather.
In addition; along with Law on Environmental Protection Laws & Regulations launches respectively the permit standard strict with European Union all over the world; and corium is expensive, limited source; simultaneously in some specific occasion (as aseptic workplace and food processing occasion); corium easily rot breed bacteria be difficult to meet the demands, microfiber synthetic leather in recent years more and more accept by people.
Although the super fine corium that substitutes is widely used, the aspects such as sports shoe leather, high-grade family property leather, automotive trim, gloves are used in.But existing super fine base cloth feel is soft, its recovery is poor and scrimp is thick; Recovery is good and scrimp exquisiteness, and its feel is just hard.Be difficult to the super fibre that obtained feel is soft, recovery good and scrimp is fine and smooth at present.What is more important, super fine voluptuousness is always abundant not as good as corium, and this makes super fibre be difficult to be used in high-grade product aspect, as aspects such as high-grade leather shoes, high-grade leather boots.Therefore can the obtained super fibre that feel is soft, voluptuousness is abundant, scrimp is fine and smooth be the key point that substitute corium future.
As everyone knows, only have that obtained feel is soft, simultaneously voluptuousness is abundant, there is the super fine base cloth of fine and smooth scrimp simultaneously, just can process the microfiber synthetic leather with high artificial leather.Therefore, the present invention is intended to produce and has soft feel, voluptuousness is abundant and scrimp is fine and smooth super fine base cloth.
Someone adopts, the way of high springback wet method polyurethane resin for superfine fiber chemical leather obtains high resilience base cloth, and (patent No. is: 200710043426), but use the obtained resin of the method to produce super fine base cloth, this base cloth can only obtain the super fine base cloth of high resilience, although mention the super fine base cloth scrimp exquisiteness that the method obtains in patent, but the super fine base cloth of the degree of this scrimp exquisiteness just than common is fine and smooth, still there is larger gap with head layer ox-hide, be difficult to the application of alternative ox-hide in high-grade field.The simultaneously high resilience base cloth that obtains of this way, plastic cement sense is strong, has gap with corium voluptuousness is abundant.
Summary of the invention
The object of this invention is to provide a kind of high emulation ultrathin fiber nylon polyurethane base cloth and preparation method thereof, to overcome the defect that prior art exists.
Described height emulation ultrathin fiber nylon polyurethane base cloth adopts nylon 6 and the islands-in-sea type fibre of polyethylene from high pressure process compound cospinning, adopts nonwoven fabric prepared by needle-punching method;
Wherein:
Nylon 6 is 35 ~ 45: 65 ~ 55 with the weight ratio of polyethylene from high pressure process, is preferably 38 ~ 43: 62 ~ 57;
Described fibre number was 3.8 ~ 5 dawn, preferably 4.0 ~ 4.5 dawn;
The needling density of nonwoven fabric acupuncture is 2300 ~ 3200l/cm
2, preferably 2350 ~ 2850l/cm
2;
Use the nonwoven fabric that this needling density obtains, closely knit, between fiber, crosslinking degree is large, lays a solid foundation for base cloth voluptuousness is abundant.
Polyethylene from high pressure process refers to the polyethylene that high-pressure process is produced, i.e. low density polyethylene (LDPE) (LDPE), and density is between 0.915 ~ 0.940 gram/cc;
The preparation method of described height emulation ultrathin fiber nylon polyurethane base cloth and preparation method thereof, comprises the steps:
Then and cut (1) by nylon 6 and the spinning of polyethylene from high pressure process melt blending, obtain fiber, obtaining length is 45 ~ 60mm staple fibre;
(2) according to the method that this area is general, carry out shredding, combing, cross lapping and acupuncture successively and obtain nonwoven fabric, make needling density be 2300 ~ 3200l/cm
2nonwoven fabric, then according to method well known in the art, on pressing, impregnating polyurethane, decrement fibrillation, expanding, the operation such as oil drying obtains base of the super fine end;
It is described that " shredding, combing, cross lapping and acupuncture obtain nonwoven fabric, make needling density be 2300 ~ 3200l/cm
2nonwoven fabric, then according to method well known in the art, through pressing, impregnating polyurethane, decrement fibrillation, the operation such as oil drying on expanding " specific operation process, can see Qu Jianbo etc. synthetic leather technology [M]. Beijing: Chemical Industry Press, 2010. documents; Wherein: flooding wet polyurethane used is so that " PTMG2000, MDI and chain extender are polymerized.
Described PTMG2000 is PTMG;
Described MDI is methyl diphenylene diisocyanate;
Described chain extender for being generally Small molecular aliphatic dihydroxy alcohol, as ethylene glycol, 1.4-butanediol, neopentyl glycol etc.
(3) base of super fine end step (2) obtained, on overflow dyeing equipment, in the scouring agent aqueous solution, carries out refining processing, and bath raio is 1:10, and scouring agent concentration is 0.5 ~ 2g/l, and the process conditions of refining processing are as follows:
After room temperature enters cloth, with the ramp of 0.5 ~ 1.5 DEG C/min, 90 ~ 110 DEG C, refining 20 ~ 60 minutes under 0.15 ~ 0.2MPA, be then cooled to room temperature;
To be that sodium alkyl sulfonate, fatty alcohol-polyoxyethylene ether and builder etc. are composite form described scouring agent, can adopt commercially produced product, as the DM-1324 that Guangdong Demei Fine Chemical Co., Ltd. produces;
(4) for dyeing series products, by the product after concise, add the dyestuff of 1 ~ 5%o.w.f, add bath raio is 1:10 simultaneously, and concentration is the levelling agent aqueous solution of 0.5-1g/L, on overflow dyeing equipment, operates 30 ~ 90 minutes at 90 ~ 115 DEG C;
Described levelling agent is amphoteric surfactant, and the levelling agent that the present invention adopts is the PL that Yayun Texile Agents Co., Ltd., Shanghai produces, and is octadecyl dimethyl benzyl ammonium chloride;
Described o.w.f is a vocabulary in dyeing and printing process, generally refers to concentration unit.In dyeing and finishing technology, concentration take fabric weight as benchmark, opposed fabric percentage.
For non-staining product, add the levelling agent aqueous solution that concentration is 0.5-1g/L.Then, at 90 ~ 115 DEG C, on overflow dyeing equipment, operate 30 ~ 90 minutes;
(5) finally by the product that step (4) obtains, dry 3 ~ 5 minutes at 130 ~ 140 DEG C.And after polishing with 200 ~ 600 order sand paper, described height emulation ultrathin fiber nylon polyurethane base cloth can be obtained.
The product that the present invention obtains, has the feel of abundant voluptuousness, fine and smooth scrimp and highly-flexible, makes it closer to ox-hide, thus obtain applying more widely in the field of alternative ox-hide.
Detailed description of the invention
Further illustrate the present invention below in conjunction with detailed description of the invention, but therefore do not limit the present invention among described scope of embodiments.
In embodiment:
Described levelling agent is octadecyl dimethyl benzyl ammonium chloride;
To be that sodium alkyl sulfonate, fatty alcohol-polyoxyethylene ether and builder etc. are composite form described scouring agent, the DM-1324 that Guangdong Demei Fine Chemical Co., Ltd. produces.
Embodiment 1
(dyeing class)
By nylon 6(PA-6) and polyethylene from high pressure process (LDPE) be 43: 57 melt blending spinning according to weight ratio, and by islands-in-sea type fibre fibre size control at 3.8 dawn, obtain the PA/PE islands-in-sea type fibre that length is 48mm.
Then by these islands-in-sea type fibres, through nonwoven fabric needling process, and needling density is controlled as 2300l/cm
2, and obtained nonwoven fabric.After gained nonwoven fabric is plated, carry out impregnation with polyether polyurethane, then after decrement fibrillation, expanding oil, obtain base of the super fine end.
Then base of super for the above-mentioned gained fine end on overflow dyeing equipment, adding bath raio is 1:10, and concentration is that the scouring agent aqueous solution of 0.5g/l carries out concise;
After room temperature enters cloth, with the ramp of 1.5 DEG C/min, at 110 DEG C, under 0.2MPa concise 60 minutes, be then cooled to room temperature;
After refining, add the dyestuff of concentration at 2.5%o.w.f.Add bath raio is 1:10 simultaneously, and concentration is the levelling agent aqueous solution of 0.5g/l, then dyes 30 minutes at 100 DEG C;
Finally by the wet basis cloth after dyeing, at 130 DEG C, carry out drying dry 5 minutes, and after polishing with 320 order sand paper, obtain soft, that voluptuousness is abundant and scrimp is fine and smooth height emulation ultrathin fiber nylon polyurethane synthetic leather base cloth.
Embodiment 2
(non-staining class)
By nylon 6(PA-6) and polyethylene from high pressure process (LDPE) be 40: 60 melt blending spinning according to weight ratio, and by islands-in-sea type fibre fibre size control at 4.2 dawn, obtain the PA/PE islands-in-sea type fibre that length is 48mm.Then by these islands-in-sea type fibres, through nonwoven fabric needling process, and needling density is controlled as 2600l/cm
2, and obtained nonwoven fabric.After gained nonwoven fabric is plated, carry out impregnation with polyether polyurethane, then after decrement fibrillation, expanding oil, obtain base of the super fine end.
Then base of super for the above-mentioned gained fine end on overflow dyeing equipment, adding bath raio is 1:10, and concentration is that the scouring agent of 1.0g/l carries out concise;
After room temperature enters cloth, with the ramp of 0.5 DEG C/min, at 100 DEG C, under 0.2MPa concise 45 minutes, be then cooled to room temperature.
After concise, adding bath raio is 1:10, and concentration is the levelling agent aqueous solution of 1g/l, operates 30 minutes at 115 DEG C;
At 135 DEG C, finally carry out drying dry 4 minutes, and after polishing with 600 order sand paper, obtain soft, that voluptuousness is abundant and scrimp is fine and smooth height emulation ultrathin fiber nylon polyurethane synthetic leather base cloth.
Embodiment 3
(non-staining class)
By nylon 6(PA-6) and polyethylene from high pressure process (LDPE) be 42: 58 melt blending spinning according to weight ratio, and by islands-in-sea type fibre fibre size control at 4.7 dawn, obtain the PA/PE islands-in-sea type fibre that length is 48mm.Then by these islands-in-sea type fibres, through nonwoven fabric needling process, and needling density is controlled as 2800l/cm
2, and obtained nonwoven fabric.After gained nonwoven fabric is plated, carry out impregnation with polyether polyurethane, then after decrement fibrillation, expanding oil, obtain base of the super fine end.
Then base of super for the above-mentioned gained fine end on overflow dyeing equipment, adding bath raio is 1:10, and concentration is the scouring agent aqueous solution of 2g/l, after room temperature enters cloth, with the ramp of 0.5 DEG C/min, at 90 DEG C, under 0.2MPa concise 60 minutes, is then cooled to room temperature.
After concise, adding bath raio is 1:10, and concentration is the levelling agent aqueous solution running of 0.8g/l, operates 90 minutes at 90 DEG C;
At 138 DEG C, finally carry out drying dry 3 minutes, and after polishing with 400 order sand paper, obtain soft, that voluptuousness is abundant and scrimp is fine and smooth height emulation ultrathin fiber nylon polyurethane synthetic leather base cloth.
Embodiment 4
(non-staining class)
By nylon 6(PA-6) and polyethylene from high pressure process (LDPE) be 40: 60 melt blending spinning according to weight ratio, and by islands-in-sea type fibre fibre size control at 4.5 dawn, obtain the PA/PE islands-in-sea type fibre that length is 48mm.Then by these islands-in-sea type fibres, through nonwoven fabric needling process, and needling density is controlled as 3000l/cm
2, and obtained nonwoven fabric.After gained nonwoven fabric is plated, carry out impregnation with polyether polyurethane, then after decrement fibrillation, expanding oil, obtain base of the super fine end.
Then base of super for the above-mentioned gained fine end on overflow dyeing equipment, adding bath raio is 1:10, and concentration is the scouring agent aqueous solution of 2g/l, after room temperature enters cloth, with the ramp of 1.5 DEG C/min, 105 DEG C, refining 50 minutes under 0.18MPa, be then cooled to room temperature.
After refining, adding bath raio is 1:10, and concentration is the levelling agent aqueous solution of 1g/l, operates 70 minutes at 115 DEG C;
At 140 DEG C, finally carry out drying dry 3 minutes, and after polishing with 320 order sand paper, obtain soft, that voluptuousness is abundant and scrimp is fine and smooth height emulation ultrathin fiber nylon polyurethane synthetic leather base cloth.
Claims (5)
1. high emulation ultrathin fiber nylon polyurethane base cloth, is characterized in that, is adopt nylon 6 and the islands-in-sea type fibre of polyethylene from high pressure process compound cospinning, adopts nonwoven fabric prepared by needle-punching method;
Wherein: nylon 6 is 35 ~ 45: 65 ~ 55 with the weight ratio of polyethylene from high pressure process.
2. high emulation ultrathin fiber nylon polyurethane base cloth according to claim 1, is characterized in that, nylon 6 is 38 ~ 43: 62 ~ 57 with the weight ratio of polyethylene from high pressure process.
3. high emulation ultrathin fiber nylon polyurethane base cloth according to claim 1, it is characterized in that, described islands-in-sea type fibre fiber number was 3.8 ~ 5 dawn, and the needling density of nonwoven fabric acupuncture is 2300 ~ 3200l/cm
2.
4. the high preparation method emulating ultrathin fiber nylon polyurethane base cloth according to any one of claims 1 to 3, is characterized in that, comprise the steps:
Then and cut (1) by nylon 6 and the spinning of polyethylene from high pressure process melt blending, obtain fiber, obtaining length is 45 ~ 60mm staple fibre;
(2) then carry out shredding, combing, cross lapping and acupuncture successively and obtain nonwoven fabric, at the drying process that oils through pressing, impregnating polyurethane, decrement fibrillation, expanding, obtain base of the super fine end;
(3) base of super fine end step (2) obtained, on overflow dyeing equipment, in the scouring agent aqueous solution, carries out refining processing;
(4) for dyeing series products, by the product after concise, add the dyestuff of 1 ~ 5%o.w.f, add bath raio is 1:10 simultaneously, and concentration is the levelling agent aqueous solution of 0.5-1g/L, on overflow dyeing equipment, operates 30 ~ 90 minutes at 90 ~ 115 DEG C;
For non-staining product, add the levelling agent aqueous solution that concentration is 0.5-1g/L, then at 90 ~ 115 DEG C, on overflow dyeing equipment, operate 30 ~ 90 minutes;
(5) finally by the product that step (4) obtains, dry 3 ~ 5 minutes at 130 ~ 140 DEG C.And after polishing with 200 ~ 600 order sand paper, described height emulation ultrathin fiber nylon polyurethane base cloth can be obtained.
5. method according to claim 4, is characterized in that, in step (3), bath raio is 1:10, and scouring agent concentration is 0.5 ~ 2g/l, and the process conditions of refining processing are as follows:
After room temperature enters cloth, with the ramp of 0.5 ~ 1.5 DEG C/min, 90 ~ 110 DEG C, refining 20 ~ 60 minutes under 0.15 ~ 0.2MPa, be then cooled to room temperature;
To be that sodium alkyl sulfonate, fatty alcohol-polyoxyethylene ether and builder are composite form described scouring agent.
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| CN104988764A (en) * | 2015-08-11 | 2015-10-21 | 耿云花 | Soft artificial leather manufacturing method |
| CN104988763A (en) * | 2015-08-11 | 2015-10-21 | 耿云花 | Soft leather |
| CN105002749A (en) * | 2015-08-19 | 2015-10-28 | 无锡双象超纤材料股份有限公司 | Preparation technology for abortive-calfskin-imitated microfiber shoe leather |
| CN105484057A (en) * | 2015-11-19 | 2016-04-13 | 上海华峰超纤材料股份有限公司 | High-temperature-resistant weather-resistant microfiber synthetic leather and preparation method thereof |
| CN106220823A (en) * | 2016-08-29 | 2016-12-14 | 山东凯仕利合成材料科技股份有限公司 | Low bullet foamless polyurethane and the imitative Corii Bovis seu Bubali microfiber synthetic leather with it as raw material production |
| CN110983783A (en) * | 2019-12-27 | 2020-04-10 | 上海华峰超纤科技股份有限公司 | High-solid-content artificial leather superfine fiber base cloth and post-treatment manufacturing method thereof |
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| CN104988764A (en) * | 2015-08-11 | 2015-10-21 | 耿云花 | Soft artificial leather manufacturing method |
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| CN105002749A (en) * | 2015-08-19 | 2015-10-28 | 无锡双象超纤材料股份有限公司 | Preparation technology for abortive-calfskin-imitated microfiber shoe leather |
| CN105484057A (en) * | 2015-11-19 | 2016-04-13 | 上海华峰超纤材料股份有限公司 | High-temperature-resistant weather-resistant microfiber synthetic leather and preparation method thereof |
| CN106220823A (en) * | 2016-08-29 | 2016-12-14 | 山东凯仕利合成材料科技股份有限公司 | Low bullet foamless polyurethane and the imitative Corii Bovis seu Bubali microfiber synthetic leather with it as raw material production |
| CN110983783A (en) * | 2019-12-27 | 2020-04-10 | 上海华峰超纤科技股份有限公司 | High-solid-content artificial leather superfine fiber base cloth and post-treatment manufacturing method thereof |
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