CN103225209A - Antistatic oil agent special for polypropylene staple fiber coarse yarn textile production and use method thereof - Google Patents
Antistatic oil agent special for polypropylene staple fiber coarse yarn textile production and use method thereof Download PDFInfo
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- CN103225209A CN103225209A CN2013101312862A CN201310131286A CN103225209A CN 103225209 A CN103225209 A CN 103225209A CN 2013101312862 A CN2013101312862 A CN 2013101312862A CN 201310131286 A CN201310131286 A CN 201310131286A CN 103225209 A CN103225209 A CN 103225209A
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- polypropylene
- polypropylene staple
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- 239000000835 fiber Substances 0.000 title claims abstract description 81
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 63
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 63
- -1 polypropylene Polymers 0.000 title claims abstract description 61
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 239000004753 textile Substances 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- 238000009941 weaving Methods 0.000 abstract description 12
- 238000009987 spinning Methods 0.000 abstract description 7
- 230000003068 static effect Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 3
- 239000002216 antistatic agent Substances 0.000 abstract 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 229920002545 silicone oil Polymers 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 239000004744 fabric Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 239000012209 synthetic fiber Substances 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 235000012489 doughnuts Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 241000876833 Emberizinae Species 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 206010046996 Varicose vein Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 150000007516 brønsted-lowry acids Chemical class 0.000 description 1
- 150000007528 brønsted-lowry bases Chemical class 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000019612 pigmentation Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses an antistatic oil agent special for polypropylene staple fiber coarse yarn textile production. The antistatic oil agent comprises: water, a water soluble antistatic agent with a mass concentration of 0.5% and water soluble organic silicone oil with a mass concentration of 2.5% that are in a ratio of 100:0.4-0.6:2.0-3.0. The water soluble antistatic agent is an aqueous interfacial activity antistatic oil agent. The antistatic agent disclosed in the invention is specially used for spinning pretreatment and beam-warping as well as weaving production, and can be used properly according to the actual situation. The use of the antistatic agent is convenient for after-treatment processing, and does not harm the product performance and the environment. Especially for medium-long type polypropylene staple fibers, and the phenomena of lap licking and poor net formation caused by easily generated static electricity in a polypropylene staple fiber spinning process can be completely eradicated.
Description
Technical field
The present invention relates to the thick special yarn weaving of a kind of polypropylene chopped fiber and produce special-purpose antistatic finish, specifically is the water-solubility electrostatic resistance finish of the thick special yarn special use of a kind of polypropylene chopped fiber.
Background technology
With the accessory substance propylene of petroleum refining is the Chinese commodity name of the synthetic fiber isotactic polypropylene fibre that makes of raw material.Claim polypropylene fibre again; The formal name used at school polypropylene fibre, nearly flame is promptly molten to contract, inflammable, the slow and over-emitting black exhaust from fire burns, the flame upper end is yellow, and the lower end blueness gives out the oil flavor, and burning back ashes are hard circle fawn particle, and hand is twisted with the fingers frangible.
It is to make the fiber that raw material makes through polymerization, melt spinning by propylene.Polypropylene fibre formally begins suitability for industrialized production in nineteen fifty-seven, is the up-and-coming youngster in the synthetic fiber.Because to have production technology simple for polypropylene fibre, product is inexpensive, the intensity height, and advantage such as relative density is light is so polypropylene fibre develops very soon.Polypropylene fibre has been the fourth-largest kind of synthetic fiber at present, is the lightest fiber in the common chemical fibre.
The production of polypropylene fibre comprises staple fibre, long filament and fibrilled film fibre etc.The polypropylene fibre membrane fiber is that polypropylene is made film earlier, then film is stretched, and makes it split into netted the making that fibril is formed.
The kind of polypropylene fibre and structure: the kind of polypropylene fibre has long filament (comprising not modified continuous filament and varicosity modified continuous filament), staple fibre, bristlelike monofilament, film-fibre, doughnut, profiled filament, various composite fibre and bonded fabric etc.Main application is to make carpet (comprising carpet lining and matte), bunting, UPHOLSTERY FABRIC, various rope, band, fishing net, asphalt felt, building reinforcing material, packaging material and industrial cloth, as filter cloth, bagging etc.This external clothing aspect is used also extensive day by day, can make dissimilar BLENDED FABRIC with multiple fiber blend, can make shirt, coat, sweat shirt, socks etc. through after the knitting processing.By the wadding quilt that the polypropylene fibre doughnut is made, light weight, warming, elasticity is good.
Structure: polypropylene fibre does not contain the chemical group that can combine with dyestuff on macromolecular structure, so dyeing is relatively more difficult.Usually adopt melt pigmentation, pigment preparation and polypropylene polymers is mixed equably in screw extruder, and it is very high to obtain the colored fibre COLOR FASTNESS through melt-spun.Another kind method is and copolymerization or graft copolymerizations such as acrylic acid, acrylonitrile, vinylpyridine, makes the polar group that introducing can combine with dyestuff on the polymer macromolecule, directly dyes with conventional method again.In the process that polypropylene fibre is produced, often need to add various additives to improve dyeability, light resistance and flame resistance.
Physical property
1. the vertical face of form polypropylene fibre is straight smooth, and the cross section is rounded.
2. the density polypropylene biggest advantage is that quality is light, and its density is the lightest kind of density in the common chemical fibre for 0.91g/cm3 only, so the higher area coverage that comparable other fibers of polypropylene fibre of same weight obtain.
3. the intensity height of stretching property polypropylene fibre by force, elongation is big, and initial modulus is higher, excellent spring.So the polypropylene fibre ABRASION RESISTANCE is good.In addition, the wet strong basis of polypropylene fibre originally equals to do strong, so it is an ideal material of making fishing net, hawser.
4. hygroscopicity and dyeability light weight warmth retention property are good; Moisture absorption hardly, but heart suction is very capable, and the moisture absorbing and sweat releasing effect is obvious; The hygroscopicity of polypropylene fibre is very little, moisture absorption hardly, and the regain under the general atmosphere condition approaches zero.But it has core sucting action, can transmit steam by the capillary in the fabric, but itself does not play any absorption.The dyeability of polypropylene fibre is relatively poor, and chromatogram is incomplete, but can adopt the method for original liquid coloring to cover the shortage.
5. acid-fast alkali-proof polypropylene fibre has chemical resistance preferably, and except red fuming nitric acid (RFNA), outside the dense caustic soda, polypropylene fibre is good to the bronsted lowry acids and bases bronsted lowry resistance, so be suitable for use as filtering material and packaging material.
6. polypropylene fibre light resistance such as light resistance is relatively poor, and heat endurance is also relatively poor, and is easily aging, not anti-flatiron.But can improve its ageing resistace by when spinning, adding antiaging agent.In addition, the electrical insulating property of polypropylene fibre is good, easily produces static man-hour but add.Because the thermal conductivity factor of polypropylene fibre is less, warmth retention property is good.
7. the high polypropylene fibre elastic filament of intensity intensity is only second to polyamide fibre, but price has only 1/3 of polyamide fibre; It is stable to make fabric size, and wear-resisting elasticity is also good, and chemical stability is good.But poor heat stability is not sun-resistant, and it is tendering to be easy to wear out, and adds age resister in the polypropylene fibre of for this reason being everlasting.
According to above characteristic, because the official regain of polypropylene fiber is 0, in the production process of spinning, is easy to generate static and causes sticking volume, become net bad, the antistatic finish of the special special use of palpus is to increase the antistatic behaviour of fiber.
Summary of the invention
Main task of the present invention is to provide the thick special yarn weaving of a kind of polypropylene chopped fiber to produce special-purpose antistatic finish, specifically is that a kind of antistatic effect is good, uses the antistatic additive of simple and environmental protection.
In order to solve above technical problem, special-purpose antistatic finish is produced in the thick special yarn weaving of a kind of polypropylene chopped fiber of the present invention, and its innovative point is: component is: water: mass concentration is 0.5% water-solubility electrostatic resistance agent: mass concentration is that 2.5% water-soluble organic silicon oil is 100:0.4---0.6:2.0---3.0.
Further, described water-solubility electrostatic resistance agent is the antistatic finish of water system interfacial activity.
Further, described water-soluble organic silicon oil is the amino modified polyorganosiloxane of nonionic.
The invention also discloses the using method that the thick special yarn of a kind of polypropylene chopped fiber is produced special-purpose antistatic finish, its innovative point is: can carry out the preliminary treatment of oil supply humidification by above-mentioned composite special-purpose antistatic finish before polypropylene fiber uses, promptly adopt the method for high-pressure sprayer spray, use amount is every 1000kg fiber with special-purpose antistatic finish 4 ~ 6kg, 24 h are deposited in the packing of spray back, make its uniformly penetrating, to increase the antistatic behaviour of fiber.
The invention has the advantages that: because the official regain of polypropylene fiber is 0, in process of textile production, be easy to generate static, the antistatic finish of the special special use of palpus, antistatic additive of the present invention is specifically designed to spinning pre-treatment and warping and weaves production, can use as one feels fit according to actual conditions, post processing processing is convenient in its use, can not bring harm to performance of product own and environment.
Particularly at the medium length type polypropylene short fiber, polypropylene chopped fiber is stopped easily to produce static and is caused sticking volume, becomes the bad phenomenon of net in spinning process.
The specific embodiment
Embodiment 1
The thick special yarn of polypropylene chopped fiber of the present invention is produced special-purpose antistatic finish, and component is: water: mass concentration is 0.5% water-solubility electrostatic resistance agent: mass concentration is that 2.5% water-soluble organic silicon oil is (100): (0.5): (2.5).
Wherein, the water-solubility electrostatic resistance agent is the antistatic finish of water system interfacial activity, and water-soluble organic silicon oil is the amino modified polyorganosiloxane of nonionic.
Above-mentioned material is modulated in the mediation bucket.To modulate the special-purpose antistatic finish of 100 kg is example, add water 90kg during modulation earlier in the mediation bucket, drop into the amino modified polyorganosiloxane stoste of antistatic finish stoste of 0.5 kg water system interfacial activity and 2.5 kg nonionics after being warming up to 50 ℃, and stir with agitator, mixing speed is 200 rev/mins, makes it evenly mixed, and then add a small amount of 50 ℃ water until satisfying said ratio, and insulation, stirring at low speed, mixing speed is 60 rev/mins, evenly can use until mixed.
Carry out the pretreated use of oil supply humidification with above-mentioned material before to polypropylene fibre medium length type fiber spinning, promptly indoor at fibre conditioning, adopt the method for high-pressure sprayer spray, use amount is every 1000kg fiber with special-purpose antistatic finish 4 ~ 6kg, 24 h are deposited in the packing of spray back, make its uniformly penetrating, thereby increased the antistatic behaviour of polypropylene fiber.
Embodiment 2
Special-purpose antistatic finish is produced in the thick special yarn weaving of polypropylene chopped fiber of the present invention, and component is: water: mass concentration is 0.5% water-solubility electrostatic resistance agent: mass concentration is that 2.5% water-soluble organic silicon oil is 100:0.6:3.0.
Wherein, the water-solubility electrostatic resistance agent is the antistatic finish of water system interfacial activity, and water-soluble organic silicon oil is the amino modified polyorganosiloxane of nonionic.
Above-mentioned material is modulated in the mediation bucket.To modulate the special-purpose antistatic finish of 100 kg is example, add water 90kg during modulation earlier in the mediation bucket, drop into the amino modified polyorganosiloxane stoste of antistatic finish stoste of 0.6 kg water system interfacial activity and 3.0 kg nonionics after being warming up to 50 ℃, and stir with agitator, mixing speed is 250 rev/mins, makes it evenly mixed, and then add a small amount of 50 ℃ water until satisfying said ratio, and insulation, stirring at low speed, mixing speed is 80 rev/mins, evenly can use until mixed.
Use with above-mentioned material during to the thick special yarn section warping of polypropylene fibre medium length type, promptly when section warping beam winding (beaming), to water-solubility electrostatic resistance agent on the thick special yarn of polypropylene fibre medium length type, warp thread unwinding from the cylinder is got off, pass through deflector roll, give water-solubility electrostatic resistance agent on the warp thread single face by roller with liquid, be wound up on the beam of a loom through deflector roll then.The liquid level of liquid bath is 6cm, and temperature is 50 ℃, regulates the roller with liquid rotating speed and controls liquid measure, and generally going up liquid measure is 2%～4% of warp thread weight.After the water-solubility electrostatic resistance agent, can form oil film on the thick special yarn of polypropylene fibre medium length type, reduce the thread friction coefficient, play sizing action to a certain extent in yam surface.Make the loom opening clear, help warp thread smoothly by stop over sheet, comprehensive, reed, thereby reduce cracked ends and float.After the water-solubility electrostatic resistance agent, weaving cracked ends, disconnection and float all has minimizing on the thick special yarn of polypropylene fibre medium length type, and the warp-wise end breakage rate reduces by 10%～15%.
Embodiment 3
Special-purpose antistatic finish is produced in the thick special yarn weaving of polypropylene chopped fiber of the present invention, and component is: water: mass concentration is 0.5% water-solubility electrostatic resistance agent: mass concentration is that 2.5% water-soluble organic silicon oil is (100): (0.6): (2.5).
Wherein, the water-solubility electrostatic resistance agent is the antistatic finish of water system interfacial activity, and water-soluble organic silicon oil is the amino modified polyorganosiloxane of nonionic.
Above-mentioned material is modulated in the mediation bucket.To modulate the special-purpose antistatic finish of 100 kg is example, add water 90kg during modulation earlier in the mediation bucket, drop into the amino modified polyorganosiloxane stoste of 0.6kg antistatic finish stoste of water system interfacial activity and 2.5 kg nonionics after being warming up to 50 ℃, and stir with agitator, mixing speed is 300 rev/mins, makes it evenly mixed, and then add a small amount of 50 ℃ water until satisfying said ratio, and insulation, stirring at low speed, mixing speed is 100 rev/mins, evenly can use until mixed.
Carry out the use of oil spout humidification during to the thick special weaving yarns of polypropylene fibre medium length type with above-mentioned material, promptly in the thick special weaving yarns of polypropylene fibre medium length type workshop, with the high pressure sprayer of shaking the head warp thread is sprayed, use amount is for per hour spraying special-purpose antistatic finish 1 ~ 1.5kg, to have increased the antistatic behaviour of the thick special weaving yarns of polypropylene fibre medium length type.Behind the shower water dissolubility antistatic additive, the loom opening is clear when weaving on the thick special yarn of polypropylene fibre medium length type, and cracked ends, disconnection and float obviously reduce, and the warp-wise end breakage rate reduces by 15%～20%.
Claims (4)
1. the thick special yarn of polypropylene chopped fiber is produced special-purpose antistatic finish, and it is characterized in that: component is: water: mass concentration is 0.5% water-solubility electrostatic resistance agent: mass concentration is that 2.5% water-soluble organic silicon oil is 100:0.4---0.6:2.0---3.0.
2. the thick special yarn of a kind of polypropylene chopped fiber according to claim 1 is produced special-purpose antistatic finish, it is characterized in that: the water-solubility electrostatic resistance agent is the antistatic finish of water system interfacial activity.
3. the thick special yarn of a kind of polypropylene chopped fiber according to claim 1 is produced special-purpose antistatic finish, it is characterized in that: water-soluble organic silicon oil is the amino modified polyorganosiloxane of nonionic.
4. a configuration and the using method that the thick special yarn of polypropylene chopped fiber is produced special-purpose antistatic finish is characterized in that: the step and the related process parameter that provide the high-pressure sprayer spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101312862A CN103225209A (en) | 2013-04-16 | 2013-04-16 | Antistatic oil agent special for polypropylene staple fiber coarse yarn textile production and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101312862A CN103225209A (en) | 2013-04-16 | 2013-04-16 | Antistatic oil agent special for polypropylene staple fiber coarse yarn textile production and use method thereof |
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| CN103225209A true CN103225209A (en) | 2013-07-31 |
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| CN2013101312862A Pending CN103225209A (en) | 2013-04-16 | 2013-04-16 | Antistatic oil agent special for polypropylene staple fiber coarse yarn textile production and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195540A (en) * | 2020-09-27 | 2021-01-08 | 南通双弘纺织有限公司 | Pre-spinning pretreatment process for polypropylene fibers and blended yarns thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01239165A (en) * | 1988-03-10 | 1989-09-25 | Chisso Corp | Dyeable polypropylene fiber |
| CN101586257A (en) * | 2008-05-19 | 2009-11-25 | 北京化工大学 | Electrostatic spinning method and device for controlling fiber adhesion |
| CN101613952A (en) * | 2009-07-30 | 2009-12-30 | 中国人民解放军国防科学技术大学 | Continuous silicon carbide fiber manufacturing oil and its application process |
-
2013
- 2013-04-16 CN CN2013101312862A patent/CN103225209A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01239165A (en) * | 1988-03-10 | 1989-09-25 | Chisso Corp | Dyeable polypropylene fiber |
| CN101586257A (en) * | 2008-05-19 | 2009-11-25 | 北京化工大学 | Electrostatic spinning method and device for controlling fiber adhesion |
| CN101613952A (en) * | 2009-07-30 | 2009-12-30 | 中国人民解放军国防科学技术大学 | Continuous silicon carbide fiber manufacturing oil and its application process |
Non-Patent Citations (1)
| Title |
|---|
| 宋自民: "疏水性丙纶短纤维的研制及生产", 《合成纤维》, vol. 35, no. 7, 16 August 2006 (2006-08-16), pages 37 - 39 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195540A (en) * | 2020-09-27 | 2021-01-08 | 南通双弘纺织有限公司 | Pre-spinning pretreatment process for polypropylene fibers and blended yarns thereof |
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Application publication date: 20130731 |