CN114150512A - Smooth PU waterborne synthetic leather of environmental protection - Google Patents
Smooth PU waterborne synthetic leather of environmental protection Download PDFInfo
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- CN114150512A CN114150512A CN202111561329.1A CN202111561329A CN114150512A CN 114150512 A CN114150512 A CN 114150512A CN 202111561329 A CN202111561329 A CN 202111561329A CN 114150512 A CN114150512 A CN 114150512A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
- D06N3/144—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer with polyurethane and polymerisation products, e.g. acrylics, PVC
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
- D06N3/005—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by blowing or swelling agent
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/10—Properties of the materials having mechanical properties
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/10—Properties of the materials having mechanical properties
- D06N2209/108—Slipping, anti-blocking, low friction
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses environment-friendly and smooth PU waterborne synthetic leather which comprises the following components in percentage by mass: 50-60 parts of PU resin, 10-20 parts of fibrilia, 10-15 parts of rock wool fiber, 7-12 parts of thermoplastic fiber, 1-3 parts of wetting and leveling agent, 10-20 parts of water-based color paste and 0.5-1 part of dispersing agent, and the preparation method comprises the following steps: s1, firstly, putting the fibrilia, the rock wool fiber and the thermoplastic fiber in the formula ratio into a mixing machine for mixing, then leveling the mixture obtained in the previous step through a leveling machine, and then carding the leveled mixture through a carding machine to obtain the base cloth. The synthetic leather manufactured by the design method of the invention has good use strength, good use hand feeling, smoothness and smoothness, and environmental protection during preparation by adopting the water-based additive.
Description
Technical Field
The invention relates to the technical field of synthetic leather, in particular to environment-friendly and smooth PU waterborne synthetic leather.
Background
The back of the PU synthetic leather is a cloth base (or a knitted cloth base), is easy to melt by combustion, has the advantages that a plurality of PVC synthetic leathers cannot compare with, and is an ideal material for replacing natural leathers, the processing technology of the PU synthetic leather can be generally divided into three methods of dry method, wet method and coagulation coating method, but the PU leather processed by the traditional processing method has poor environmental protection property, can cause great pollution to the environment, and the processed synthetic leather has rough surface and poor hand feeling.
Disclosure of Invention
The invention aims to provide environment-friendly and smooth PU waterborne synthetic leather, which is used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the environment-friendly smooth PU waterborne synthetic leather comprises the following components in percentage by mass:
50-60 parts of PU resin
10-20 parts of fibrilia
10-15 parts of rock wool fiber
7-12 parts of thermoplastic fiber
1-3 parts of wetting and leveling agent
10-20 parts of water-based color paste
0.5-1 part of dispersant.
A preparation method of environment-friendly smooth PU waterborne synthetic leather comprises the following steps:
s1, firstly, putting the fibrilia, the rock wool fiber and the thermoplastic fiber in the formula ratio into a mixing machine for mixing, then leveling the mixture obtained in the previous step through a leveling machine, and then carding the leveled mixture through a carding machine to obtain base cloth;
s2, pouring the PU resin into a heating kettle for heating, then sequentially adding the wetting leveling agent, the water-based color paste and the dispersing agent, continuing stirring, and mixing the mixture for later use;
s3, laying a layer of release paper on the surface of the workbench, uniformly coating a layer of mixture on the surface of the release paper, laying the base cloth obtained in the step I on the surface of the mixture, coating a layer of mixture on the surface of the base cloth, and laying a layer of release paper;
s4, conveying the workbench into a drying box for drying treatment, then performing air cooling, and tearing off release paper after cooling to obtain the environment-friendly and smooth PU waterborne synthetic leather;
s5, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified
Preferably, the PU resin in the first step is prepared by mixing water-based polyurethane resin, polyethylene, acrylic resin, a foaming agent, an organic silicon leveling agent, a polyether defoaming agent, a water-based polyurethane thickener and water.
Preferably, the step S1 in the second step is to add an aqueous binder during mixing, and the temperature is controlled at 30-40 ℃.
Preferably, the temperature of the step S2 in the second step is controlled to be 50-60 ℃ when heating is carried out, and the stirring time is controlled to be 15-30 min.
Preferably, the thickness of the mixture in step two, S3, is maintained at 10-20 μm when the mixture is applied.
Preferably, in the step S4 in the step two, the temperature is kept at 150-.
Compared with the prior art, the invention has the following beneficial effects:
the synthetic leather manufactured by the design method of the invention has good use strength, good use hand feeling, smoothness and smoothness, and environmental protection during preparation by adopting the water-based additive.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that:
the environment-friendly smooth PU waterborne synthetic leather comprises the following components in percentage by mass:
50-60 parts of PU resin
10-20 parts of fibrilia
10-15 parts of rock wool fiber
7-12 parts of thermoplastic fiber
1-3 parts of wetting and leveling agent
10-20 parts of water-based color paste
0.5-1 part of dispersant.
The first embodiment is as follows:
firstly, putting fibrilia, rock wool fiber and thermoplastic fiber in a formula proportion into a mixing machine for mixing, then leveling the mixture obtained in the step by a leveling machine, then carding the leveled mixture by a carding machine to obtain base cloth, then pouring PU resin into a heating kettle for heating, then sequentially adding a wetting leveling agent, aqueous color paste and a dispersing agent, continuously stirring, mixing the mixture for later use, then laying a layer of release paper on the surface of a workbench, then uniformly coating a layer of mixture on the surface of the release paper, then laying the base cloth obtained in the step one on the surface of the mixture, then coating a layer of mixture on the surface of the base cloth, finally laying a layer of release paper, then sending the workbench into a drying box for drying treatment, then carrying out air cooling, after cooling is finished, tearing off the release paper, and obtaining the environment-friendly and smooth PU aqueous synthetic leather, and finally, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
Example two:
in the first embodiment, the following steps are added:
the PU resin in the step one is prepared by mixing waterborne polyurethane resin, polyethylene, acrylic resin, a foaming agent, an organic silicon flatting agent, a polyether defoaming agent, a waterborne polyurethane thickener and water.
Firstly, putting fibrilia, rock wool fiber and thermoplastic fiber in a formula proportion into a mixing machine for mixing, then leveling the mixture obtained in the step by a leveling machine, then carding the leveled mixture by a carding machine to obtain base cloth, then pouring PU resin into a heating kettle for heating, then sequentially adding a wetting leveling agent, aqueous color paste and a dispersing agent, continuously stirring, mixing the mixture for later use, then laying a layer of release paper on the surface of a workbench, then uniformly coating a layer of mixture on the surface of the release paper, then laying the base cloth obtained in the step one on the surface of the mixture, then coating a layer of mixture on the surface of the base cloth, finally laying a layer of release paper, then sending the workbench into a drying box for drying treatment, then carrying out air cooling, after cooling is finished, tearing off the release paper, and obtaining the environment-friendly and smooth PU aqueous synthetic leather, and finally, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
Example three:
in the second embodiment, the following steps are added:
in the step S1 in the step II, an aqueous binder is added during mixing, and the temperature is controlled to be 30-40 ℃.
Firstly, putting fibrilia, rock wool fiber and thermoplastic fiber in a formula proportion into a mixing machine for mixing, then leveling the mixture obtained in the step by a leveling machine, then carding the leveled mixture by a carding machine to obtain base cloth, then pouring PU resin into a heating kettle for heating, then sequentially adding a wetting leveling agent, aqueous color paste and a dispersing agent, continuously stirring, mixing the mixture for later use, then laying a layer of release paper on the surface of a workbench, then uniformly coating a layer of mixture on the surface of the release paper, then laying the base cloth obtained in the step one on the surface of the mixture, then coating a layer of mixture on the surface of the base cloth, finally laying a layer of release paper, then sending the workbench into a drying box for drying treatment, then carrying out air cooling, after cooling is finished, tearing off the release paper, and obtaining the environment-friendly and smooth PU aqueous synthetic leather, and finally, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
Example four:
in the third embodiment, the following steps are added:
and in the step II, the temperature of S2 is controlled to be 50-60 ℃ during heating, and the stirring time is controlled to be 15-30 min.
Firstly, putting fibrilia, rock wool fiber and thermoplastic fiber in a formula proportion into a mixing machine for mixing, then leveling the mixture obtained in the step by a leveling machine, then carding the leveled mixture by a carding machine to obtain base cloth, then pouring PU resin into a heating kettle for heating, then sequentially adding a wetting leveling agent, aqueous color paste and a dispersing agent, continuously stirring, mixing the mixture for later use, then laying a layer of release paper on the surface of a workbench, then uniformly coating a layer of mixture on the surface of the release paper, then laying the base cloth obtained in the step one on the surface of the mixture, then coating a layer of mixture on the surface of the base cloth, finally laying a layer of release paper, then sending the workbench into a drying box for drying treatment, then carrying out air cooling, after cooling is finished, tearing off the release paper, and obtaining the environment-friendly and smooth PU aqueous synthetic leather, and finally, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
Example five:
in the fourth example, the following steps were added:
step S3 in step two is to keep the thickness of the mixture at 10-20 μm when the mixture is applied.
Firstly, putting fibrilia, rock wool fiber and thermoplastic fiber in a formula proportion into a mixing machine for mixing, then leveling the mixture obtained in the step by a leveling machine, then carding the leveled mixture by a carding machine to obtain base cloth, then pouring PU resin into a heating kettle for heating, then sequentially adding a wetting leveling agent, aqueous color paste and a dispersing agent, continuously stirring, mixing the mixture for later use, then laying a layer of release paper on the surface of a workbench, then uniformly coating a layer of mixture on the surface of the release paper, then laying the base cloth obtained in the step one on the surface of the mixture, then coating a layer of mixture on the surface of the base cloth, finally laying a layer of release paper, then sending the workbench into a drying box for drying treatment, then carrying out air cooling, after cooling is finished, tearing off the release paper, and obtaining the environment-friendly and smooth PU aqueous synthetic leather, and finally, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
Example six:
in the fifth example, the following steps were added:
and step S4 in the step II, during drying, the temperature is kept at 150-180 ℃, the drying time is kept at 20-25min, and the synthetic leather is flattened by a flattening machine in the drying process.
Firstly, putting fibrilia, rock wool fiber and thermoplastic fiber in a formula proportion into a mixing machine for mixing, then leveling the mixture obtained in the step by a leveling machine, then carding the leveled mixture by a carding machine to obtain base cloth, then pouring PU resin into a heating kettle for heating, then sequentially adding a wetting leveling agent, aqueous color paste and a dispersing agent, continuously stirring, mixing the mixture for later use, then laying a layer of release paper on the surface of a workbench, then uniformly coating a layer of mixture on the surface of the release paper, then laying the base cloth obtained in the step one on the surface of the mixture, then coating a layer of mixture on the surface of the base cloth, finally laying a layer of release paper, then sending the workbench into a drying box for drying treatment, then carrying out air cooling, after cooling is finished, tearing off the release paper, and obtaining the environment-friendly and smooth PU aqueous synthetic leather, and finally, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a glossy PU waterborne synthetic leather of environmental protection which characterized in that: the composition comprises the following components in percentage by mass:
50-60 parts of PU resin
10-20 parts of fibrilia
10-15 parts of rock wool fiber
7-12 parts of thermoplastic fiber
1-3 parts of wetting and leveling agent
10-20 parts of water-based color paste
0.5-1 part of dispersant.
2. A preparation method of environment-friendly smooth PU waterborne synthetic leather is characterized by comprising the following steps: the method comprises the following steps:
s1, firstly, putting the fibrilia, the rock wool fiber and the thermoplastic fiber in the formula ratio into a mixing machine for mixing, then leveling the mixture obtained in the previous step through a leveling machine, and then carding the leveled mixture through a carding machine to obtain base cloth;
s2, pouring the PU resin into a heating kettle for heating, then sequentially adding the wetting leveling agent, the water-based color paste and the dispersing agent, continuing stirring, and mixing the mixture for later use;
s3, laying a layer of release paper on the surface of the workbench, uniformly coating a layer of mixture on the surface of the release paper, laying the base cloth obtained in the step I on the surface of the mixture, coating a layer of mixture on the surface of the base cloth, and laying a layer of release paper;
s4, conveying the workbench into a drying box for drying treatment, then performing air cooling, and tearing off release paper after cooling to obtain the environment-friendly and smooth PU waterborne synthetic leather;
s5, detecting the environment-friendly and smooth PU waterborne synthetic leather obtained in the step, cutting, packaging and warehousing after the detection is qualified.
3. The environmentally friendly smooth aqueous synthetic PU leather according to claim 1, wherein: the PU resin in the first step is prepared by mixing water-based polyurethane resin, polyethylene, acrylic resin, a foaming agent, an organic silicon leveling agent, a polyether defoaming agent, a water-based polyurethane thickener and water.
4. The environmentally friendly smooth aqueous synthetic PU leather according to claim 2, wherein: in the step two, the step S1 needs to add the water-based adhesive during mixing, and the temperature is controlled to be 30-40 ℃.
5. The environmentally friendly smooth aqueous synthetic PU leather according to claim 2, wherein: and in the step II, the temperature of the step S2 is controlled to be 50-60 ℃ during heating, and the stirring time is controlled to be 15-30 min.
6. The environmentally friendly smooth aqueous synthetic PU leather according to claim 2, wherein: and step S3 in the second step keeps the thickness of the mixture at 10-20 μm when the mixture is coated.
7. The environmentally friendly smooth aqueous synthetic PU leather according to claim 2, wherein: and in the step two, in the step S4, the temperature is kept at 150-180 ℃, the drying time is kept at 20-25min, and the synthetic leather is flattened by a flattening machine in the drying process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561329.1A CN114150512A (en) | 2021-12-20 | 2021-12-20 | Smooth PU waterborne synthetic leather of environmental protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561329.1A CN114150512A (en) | 2021-12-20 | 2021-12-20 | Smooth PU waterborne synthetic leather of environmental protection |
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| CN114150512A true CN114150512A (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111561329.1A Pending CN114150512A (en) | 2021-12-20 | 2021-12-20 | Smooth PU waterborne synthetic leather of environmental protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116065407A (en) * | 2023-02-08 | 2023-05-05 | 无锡市曼优丽新型复合材料有限公司 | Wear-resistant artificial leather and preparation method thereof |
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2021
- 2021-12-20 CN CN202111561329.1A patent/CN114150512A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116065407A (en) * | 2023-02-08 | 2023-05-05 | 无锡市曼优丽新型复合材料有限公司 | Wear-resistant artificial leather and preparation method thereof |
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