CN114261161A - Multi-layer composite fabric for down jackets and preparation method thereof - Google Patents
Multi-layer composite fabric for down jackets and preparation method thereof Download PDFInfo
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- 239000004744 fabric Substances 0.000 title claims abstract description 122
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- 239000000758 substrate Substances 0.000 claims abstract description 31
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- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 27
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 18
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- 239000002253 acid Substances 0.000 claims abstract description 9
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 9
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000005871 repellent Substances 0.000 claims description 10
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- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
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- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
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- 239000003292 glue Substances 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
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- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 claims description 2
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- 210000001161 mammalian embryo Anatomy 0.000 claims 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims 1
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Glycerol trioctadecanoate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims 1
- 238000005470 impregnation Methods 0.000 claims 1
- 239000012299 nitrogen atmosphere Substances 0.000 claims 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
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- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
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- 239000004814 polyurethane Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
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- 239000003963 antioxidant agent Substances 0.000 description 2
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- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- GGHDAUPFEBTORZ-UHFFFAOYSA-N propane-1,1-diamine Chemical compound CCC(N)N GGHDAUPFEBTORZ-UHFFFAOYSA-N 0.000 description 2
- 229960004889 salicylic acid Drugs 0.000 description 2
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
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Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Laminated Bodies (AREA)
Abstract
本发明涉及一种羽绒服用多层复合面料及其制备方法，属于面料技术领域，羽绒服用多层复合面料，所述复合面料包括防静电层、布料基材、纳米防水层，所述防静电层和纳米防水层分别通过热压复合在布料基材两面。本发明羽绒服用多层复合面料，本发明羽绒服用多层复合面料，采用聚酰亚胺酸二氧化钛纺丝和棉花纤维组成的防静电层，增加面料的抗静电性，采用改性聚酰亚胺纤维和聚酯纤维织造而成的布料基材，使得面料在具备优异弹性的效果还具有良好的抗撕裂性；采用包含防老化剂和玻璃微珠的聚四氟乙烯膜且在膜表面涂布一层玻璃微珠，制成的纳米防水层，在制作时增加聚四氟乙烯膜的热稳定性。The invention relates to a multi-layer composite fabric for down clothing and a preparation method thereof, belonging to the technical field of fabrics. and the nano waterproof layer are respectively laminated on both sides of the cloth substrate by hot pressing. The multi-layer composite fabric of the down jacket of the present invention adopts the anti-static layer composed of polyimide acid titanium dioxide spinning and cotton fiber to increase the anti-static property of the fabric, and adopts the modified polyimide The fabric base material woven from fiber and polyester fiber makes the fabric have excellent elasticity and good tear resistance; PTFE film containing anti-aging agent and glass microbeads is used and coated on the surface of the film. A layer of glass microbeads is clothed to make a nano waterproof layer, which increases the thermal stability of the PTFE film during production.
Description
Technical Field
The invention belongs to the technical field of fabrics, and particularly relates to a multi-layer composite fabric for down jackets and a preparation method thereof.
Background
At present, most of common down jacket fabrics are prepared by mainly adopting a waterproof moisture permeable PTFE film and fabric surface laminating technology or compounding a waterproof moisture permeable PU film and the fabric. The down jacket fabric in the prior art can prevent water, oil and dirt and other dirt while partially keeping the original fabric characteristics, and the technology can be roughly divided into three types: firstly, the waterproof effect is realized through the water swelling of the fibers, but the softness, the air permeability and the comfort of the fabric are poor after long-term use, so that the fabric is difficult to become the mainstream of the market; secondly, the coating realizes water resistance, and because the coating has poor waterproof and moisture-permeable performance, the coating becomes hard and aged at high temperature, serious dirt cannot be thoroughly cleaned, the coating is easy to crack, and the market share is gradually reduced; thirdly, the waterproof is realized by laminating the waterproof membrane, polytetrafluoroethylene and the fabric are subjected to composite lamination, and the drapability, the heat retention property, the flexibility, the safety and the portability of the fabric are lost to a certain extent after lamination. Therefore, the multi-layer composite fabric for the down jacket and the preparation method thereof are provided.
Disclosure of Invention
The invention aims to solve the problems and provide a multi-layer composite fabric for down jackets and a preparation method thereof.
The invention realizes the purpose through the following technical scheme:
the invention provides a preparation method of a multi-layer composite fabric for down jackets, the composite fabric comprises an anti-static layer, a cloth substrate and a nano waterproof layer, the anti-static layer and the nano waterproof layer are respectively compounded on two surfaces of the cloth substrate through hot pressing, and the preparation method comprises the following steps:
(1) performing high-voltage electrostatic spinning on the mixed spinning solution of titanium dioxide polyimidate to form a silk film, laying a layer of cotton fiber on the film, continuously spinning, and circulating for 2-3 times to obtain the antistatic layer;
(2) adding an anti-aging agent and glass beads into a polytetrafluoroethylene membrane raw material, performing high-temperature treatment, stretching to obtain a blank cloth, coating an adhesive A containing the glass beads on the blank cloth, and drying to obtain a nano water repellent layer;
(3) the cloth base material is woven by modified polyimide fibers and polyester fibers;
(4) and uniformly spraying an adhesive B on two sides of the cloth substrate, then compounding the antistatic layer and the nano water repellent layer on the two sides of the cloth substrate, washing with deionized water for 1-2 times, and naturally drying to obtain the finished product of the composite fabric.
As a further improvement of the present invention, in the step (1), 4' -diaminodiphenyl ether is dissolved in a polar solvent, then nano titanium dioxide particles are added into the solution, pyromellitic dianhydride is added, the mixed spinning solution of polyimide acid and titanium dioxide is prepared by fully stirring in a nitrogen environment, then a high-voltage electrostatic spinning device is adopted to spin a layer of silk film on a vertical plane, then a layer of cotton fiber is transversely laid on the vertical plane, the vertical plane is erected after flattening, high-voltage electrostatic spinning is continued, and the cycle is performed for 2-3 times, so that the antistatic layer is obtained.
As a further improvement of the invention, in the step (2), the polytetrafluoroethylene granule raw material is put into a hot melting machine to be stirred and melted, then an anti-aging agent and glass beads are added, a polytetrafluoroethylene film is produced by conventional film forming, and is coiled into a polytetrafluoroethylene material roll, the polytetrafluoroethylene material roll is transversely stretched by 2-3 times or longitudinally stretched by 2-3 times, after being cooled into a gray cloth, an adhesive A containing the glass beads is coated on the gray cloth, and the nano water repellent layer is obtained after drying.
As a further improvement of the invention, the preparation steps of the anti-aging agent are as follows: adding a mixture of tricarboxyphenylboronic acid and a cross-linking agent into a phosphite antioxidant to obtain a mixed solution, preserving the heat of the mixed solution for 1-2 hours at the temperature of 40-60 ℃, centrifugally washing, freeze-drying to obtain a reaction product, adding hyperbranched polyurethane acrylate and a ketone solvent into the reaction product, fully mixing and uniformly stirring, and drying precipitates after centrifugation to obtain the anti-aging agent.
As a further improvement of the invention, the adhesive A comprises, by mass, 82.8-94.5% of polyacrylate adhesive, 1.5-2.8% of ethyl silicone oil, 0.8-1.5% of hard amide, 1.3-3.8% of curing agent, 1.0-2.6% of coupling agent, 0.8-1.5% of C6-C10 alcohols and 4.3-12.6% of glass beads.
As a further improvement of the invention, in the step (2), the particle size of the glass beads is 350-400 meshes, the roundness is more than or equal to 98%, the devitrification rate is less than 3%, and the refractive index is 1.9-2.0.
As a further improvement of the invention, the preparation steps of the modified polyimide fiber are specifically as follows: pickling common polyimide fibers for 20-30min by using salicylic acid, then fishing out, draining, catalytically soaking for 20-30min by using ammonium chloride, then placing the fibers into a continuous carbonization furnace with the temperature of 600-800 ℃ and the nitrogen environment for heat treatment for 40-60min, and finally placing the fibers into a steam activation furnace with the temperature of 400-500 ℃ for heat treatment for 20-30min to obtain the modified polyimide fibers.
In a further improvement of the invention, in the step (3), the polyester fiber and the polyimide fiber are mixed according to a mass ratio of (0.8-1): (0.1-0.3) spinning.
As a further improvement of the invention, the adhesive B comprises 60-70% of viscose, 10-20% of sodium stearate, 10-20% of polyvinyl alcohol, 1-5% of propane diamine and 1-5% of trimethylolpropane by mass percentage.
The invention also provides a multi-layer composite fabric for the down jacket, which is prepared by the preparation method.
The invention has the beneficial effects that:
according to the down coat multilayer composite fabric, the antistatic layer composed of polyimide titanium dioxide spinning and cotton fibers is adopted, the antistatic property of the fabric is improved, and meanwhile, titanium dioxide can generate excellent antibacterial and anti-aging effects under the action of high-voltage static electricity;
the fabric base material woven by the modified polyimide fibers and the polyester fibers enables the fabric to have excellent elasticity and good tear resistance;
the polytetrafluoroethylene film containing the anti-aging agent and the glass beads is adopted, the glass beads are coated on the surface of the film, and the prepared nano waterproof layer increases the thermal stability of the polytetrafluoroethylene film during manufacturing, has high tinting strength during dyeing, and can ensure that the fabric has the effects of heat insulation and heat preservation and anti-aging.
Detailed Description
The present application is described in further detail below, and it should be noted that the following detailed description is provided for illustrative purposes only, and is not intended to limit the scope of the present application, which is defined by the appended claims.
Example 1
The multilayer composite fabric for the down jacket in the embodiment comprises an antistatic layer, a cloth substrate and a nanometer waterproof layer, wherein the antistatic layer and the nanometer waterproof layer are respectively compounded on two sides of the cloth substrate through hot pressing, and the preparation method comprises the following steps:
(1) dissolving 4,4' -diaminodiphenyl ether in a polar solvent, adding nano titanium dioxide particles into the solution, adding pyromellitic dianhydride, fully stirring in a nitrogen environment to prepare polyimide titanium dioxide mixed spinning solution, spinning a layer of silk film on a vertical plane by using a high-voltage electrostatic spinning device, transversely laying a layer of cotton fiber on the vertical plane, flattening, standing the vertical plane, continuing high-voltage electrostatic spinning, and circulating for 2-3 times to obtain an antistatic layer;
(2) adding a mixture of tricarboxyphenylboronic acid and a cross-linking agent into a phosphite antioxidant to obtain a mixed solution, keeping the temperature of the mixed solution at 60 ℃ for 1h, performing centrifugal washing and freeze drying to obtain a reaction product, adding hyperbranched polyurethane acrylate and a ketone solvent into the reaction product, mixing the mixture fully and uniformly, performing centrifugation, drying precipitates to obtain an anti-aging agent, putting a polytetrafluoroethylene pellet raw material into a hot melting machine, stirring and melting the polytetrafluoroethylene pellet raw material, adding the anti-aging agent and glass beads, performing conventional film formation to produce a polytetrafluoroethylene film, winding the polytetrafluoroethylene film into a polytetrafluoroethylene roll, transversely stretching the polytetrafluoroethylene roll by 2-3 times or longitudinally stretching the polytetrafluoroethylene roll by 2-3 times, after cooling the polytetrafluoroethylene roll into a blank, coating an adhesive A containing the glass beads on the blank, and drying the blank to obtain a nano water repellent layer; wherein the dosage of the glass beads is 0.6-0.8 percent of the mass of the raw material of the polytetrafluoroethylene material particles, the dosage of the anti-aging agent is 1.1-1.8 percent of the mass of the raw material of the polytetrafluoroethylene material particles, the particle size of the glass beads is 350-400 meshes, the roundness is more than or equal to 98 percent, the devitrification rate is less than 3 percent, and the refractive index is 1.9-2.0; the adhesive A comprises, by mass, 94.5% of polyacrylate adhesive, 2.8% of ethyl silicone oil, 0.8% of hard amide, 3.8% of curing agent, 2.6% of coupling agent, 0.8% of C6-C10 alcohol and 4.3% of glass beads.
(3) Pickling common polyimide fibers with salicylic acid with the volume concentration of 30% for 20min, then fishing out, draining, catalytically impregnating with ammonium chloride for 30min, then putting into a continuous carbonization furnace with the temperature of 600 ℃ and a nitrogen environment for heat treatment for 60min, and finally putting into a water vapor activation furnace with the temperature of 500 ℃ for heat treatment for 20min to obtain modified polyimide fibers, wherein the polyester fibers and the polyimide fibers are mixed according to the mass ratio of 1: 0.1, spinning to obtain a cloth substrate;
(4) uniformly spraying an adhesive B on two sides of the cloth substrate, then compounding the antistatic layer and the nano water repellent layer on the two sides of the cloth substrate, washing with deionized water for 1-2 times, and naturally drying to obtain a finished product composite fabric; wherein, the adhesive B comprises 60 to 70 percent of cellophane, 10 to 20 percent of sodium stearate, 10 to 20 percent of polyvinyl alcohol, 1 to 5 percent of propane diamine and 1 to 5 percent of trimethylolpropane by mass percent.
Example 2
The multilayer composite fabric for the down jacket in the embodiment comprises an antistatic layer, a cloth substrate and a nanometer waterproof layer, wherein the antistatic layer and the nanometer waterproof layer are respectively compounded on two surfaces of the cloth substrate through hot pressing, and in the preparation method, polyester fibers and polyimide fibers in the step (4) are removed according to the mass ratio of 0.8: 0.3 textile, otherwise as in example 1.
Example 3
The multi-layer composite fabric for the down jacket in the embodiment comprises an anti-static layer, a cloth substrate and a nano waterproof layer, wherein the anti-static layer and the nano waterproof layer are compounded on two surfaces of the cloth substrate respectively through hot pressing, in the preparation method step, except that an adhesive A in the step (2) comprises 82.8% of polyacrylate glue, 2.8% of ethyl silicone oil, 1.5% of hard amide, 3.8% of a curing agent, 2.6% of a coupling agent, 1.5% of C6-C10 alcohols and 12.6% of glass beads, the steps are the same as those in the embodiment 2.
Comparative example 1
The multi-layer composite fabric for the down jacket in the comparative example comprises a cloth base material and a nano waterproof layer, wherein the nano waterproof layer is compounded on the surface of the cloth base material through hot pressing, the preparation method has no step (1), and the rest is the same as that of the example 3.
Comparative example 2
The multi-layer composite fabric for the down jacket in the comparative example comprises a cotton fiber layer, a cloth substrate and a nano waterproof layer, wherein the cotton fiber layer and the nano waterproof layer are respectively compounded on two surfaces of the cloth substrate through hot pressing, the preparation method does not comprise the step (1), and the rest is the same as that in the example 3.
Comparative example 3
The multi-layer composite fabric for the down jacket in the comparative example comprises an antistatic layer, a cloth substrate and a nano waterproof layer, wherein the antistatic layer and the nano waterproof layer are compounded on two surfaces of the cloth substrate respectively through hot pressing, and except that an anti-aging agent and glass beads are not added into a polytetrafluoroethylene pellet raw material in the step (2), the preparation method is the same as that in the example 3.
Comparative example 4
The multi-layer composite fabric for the down jacket in the comparative example comprises an antistatic layer, a cloth substrate and a nano waterproof layer, wherein the antistatic layer and the nano waterproof layer are respectively compounded on two surfaces of the cloth substrate through hot pressing, the adhesive A is 100% of polyacrylate adhesive in the preparation method except the step (2), and the preparation method is the same as the step 3.
Comparative example 5
The multi-layer composite fabric for the down jacket in the comparative example comprises an antistatic layer, a cloth substrate and a nano waterproof layer, wherein the antistatic layer and the nano waterproof layer are compounded on two surfaces of the cloth substrate respectively through hot pressing, in the preparation method, except for the step (3), the cloth substrate is formed by mixing and spinning common polyimide fibers and polyester fibers, and the rest is the same as that in the example 3.
Comparative example 6
The multi-layer composite fabric for the down jacket in the comparative example comprises an antistatic layer, a cloth substrate and a nano waterproof layer, wherein the antistatic layer and the nano waterproof layer are compounded on two surfaces of the cloth substrate respectively through hot pressing, and in the preparation method, except for the step (3), the cloth substrate is woven by only adopting polyester fibers, and the steps are the same as those in the example 3.
Comparative example 7
The multi-layer composite fabric for the down jacket in the comparative example comprises an antistatic layer, a cloth substrate and a nano waterproof layer, wherein the antistatic layer and the nano waterproof layer are respectively compounded on two surfaces of the cloth substrate through hot pressing, the preparation method comprises the steps except for the step (4), the adhesive B is 100% cellophane glue, and the steps are the same as those in the example 3.
In order to verify the effect of the multi-layered composite fabric for down jackets according to the present invention, the following tests were performed on the fabrics prepared in examples and comparative examples.
1. For the fabrics prepared in the examples and the comparative examples, the glass cup was filled with water at 100 ℃, and then the glass cup was wrapped in the sample fabric, and the temperature of the surface of the fabric was measured. The same area sample is taken, and the antistatic performance is expressed by the specific resistance Rs (resistance between corresponding sides of each square unit sample) of the surface of the fabric. The results are shown in Table 1.
The composite fabric prepared by the invention has excellent heat insulation performance and antistatic performance, and the antistatic layer, the fabric base material and the nano waterproof layer of the composite fabric all affect the heat insulation performance of the fabric as can be seen from the table, and the addition of the glass beads has a great influence on the heat insulation performance of the fabric as can be seen from examples 1-3 and comparative examples 3-4, the addition of the polyimide acid titanium dioxide spinning affects the antistatic performance of the fabric, and the modified polyimide fibers also have a certain influence on the antistatic performance of the fabric.
2. For the fabrics prepared in the examples and the comparative examples, the samples were subjected to a tensile test according to GB/T3923.1-2013 textile-fabric tensile property and a tear property test according to GB/T3917.3-2009 textile-fabric tear property. The results are shown in Table 2.
The composite fabric prepared by the invention has excellent tear resistance, and as can be seen from examples 1-3 and comparative examples 5-6, the addition of the polyimide fibers plays a decisive role in the tear resistance of the fabric, and the untreated polyimide fibers have certain tear resistance but relatively poor effect, but the addition of the polyimide fibers influences the elasticity of the fabric, and the good effect in the examples is achieved by adjusting the mass ratio of different fibers.
3. For the fabrics prepared in the examples and the comparative examples, a contact angle test was performed using an OCA 40 type video contact angle measuring instrument, the amount of water was 6 μ l, and the reading was performed after a water drop was contacted with the fabric for 60 seconds. The measurements were taken 5 times at different positions on the same sample and averaged, the larger the contact angle, the better the water repellency. Respectively detecting contact angles of two surfaces of the fabric; the results are shown in Table 3.
4. The softness of the fabrics prepared in the examples and comparative examples was measured by human senses and varied from hard to soft with an index of 0-10. The results are shown in Table 3.
The composite fabric prepared by the invention has excellent waterproof performance, achieves the water-repellent effect, and can keep good softness under the same water-repellent effect.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
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| CN116239884A (en) * | 2023-02-22 | 2023-06-09 | 高梵(浙江)信息技术有限公司 | Waterproof breathable film for fabric and preparation method thereof |
| CN117322689A (en) * | 2023-09-27 | 2024-01-02 | 高梵(浙江)信息技术有限公司 | Nanometer waterproof, oil-proof and dustproof down jacket and preparation method thereof |
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