CN112391852A - Back flocking synthetic leather - Google Patents
Back flocking synthetic leather Download PDFInfo
- Publication number
- CN112391852A CN112391852A CN202011110941.2A CN202011110941A CN112391852A CN 112391852 A CN112391852 A CN 112391852A CN 202011110941 A CN202011110941 A CN 202011110941A CN 112391852 A CN112391852 A CN 112391852A
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- Prior art keywords
- leather
- synthetic leather
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- parts
- flocking
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Classifications
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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
- D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
- D06N7/0097—Web coated with fibres, e.g. flocked
-
- 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
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0009—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using knitted fabrics
-
- 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
- D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
-
- 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
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides back flocking synthetic leather, which relates to the technical field of synthetic leather and comprises a substrate base layer, wherein a dry method veneer layer is pasted on the upper side of the substrate base layer, a leather scrap bonding layer is pasted on the other side of the substrate base layer, and an electrostatic leather skin layer is arranged on the lower side of the leather scrap bonding layer; compared with the traditional process, the surface effect of the synthetic leather manufactured by the process is similar to that of genuine leather, and meanwhile, the electrostatic flocking technology is adopted, the waste genuine leather scraps are implanted into the back of the leather, fluff is fine and soft, the integral genuine leather feeling is improved, the synthetic leather has the advantages of being high in air permeability, thin in thickness, good in elasticity and the like, the price of the synthetic leather is far lower than that of the genuine leather, and the synthetic leather is suitable for mass consumers.
Description
Technical Field
The invention relates to the technical field of synthetic leather, in particular to back-flocked synthetic leather.
Background
With the enhancement of the protection consciousness of human beings on animals and the higher price of the genuine leather for common consumers, a semi-synthetic leather product appears, the price is far lower than that of the genuine leather, but the genuine leather is exactly like the genuine leather in terms of overall material, hand feeling and quality, and the product is suitable for the common consumers.
Disclosure of Invention
The invention aims to provide back flocking synthetic leather to solve the technical problem.
In order to solve the technical problems, the invention adopts the following technical scheme: the back flocking synthetic leather comprises a substrate base layer, wherein a dry-process laminated surface layer is adhered to the upper side of the substrate base layer, a leather scrap adhesive layer is adhered to the other side of the substrate base layer, and an electrostatic leather layer is arranged on the lower side of the leather scrap adhesive layer.
The invention preferably comprises the following components: the back flocking synthetic leather comprises the following manufacturing steps:
step 1, selecting weft-knitted suede-like base cloth to manufacture a wet-process base bass, wherein the hand feeling is extremely soft, and the elasticity is good;
step 2, configuring a surface and bottom facing coating by using soft polyurethane resin and toner, coating a surface layer slurry with the thickness of 0.15mm on paper patterns in a scraping way, completely drying the paper patterns at the high temperature of 120 ℃ after 100-plus-material drying, repeatedly operating a backing material, and extruding the backing material and the Bass by two silica gel wheels to be attached at the temperature of 100-120 ℃;
step 3.100-130 ℃ calendering treatment, adjusting the surface luminosity to enable the surface luminosity to have a skin-shine effect;
step 4, adding 3-5 parts of organic silicon slip auxiliary agent into 100 parts of deionized water, uniformly mixing, uniformly spraying the mixture on the surface of the synthetic leather in a spraying mode, and drying at the temperature of 120-130 ℃ for 2-3 minutes to obtain a smooth touch feeling;
step 5, coating flocking glue on the back;
step 6, planting the leather scraps electrostatically, drying and brushing off the non-adhered leather scraps;
and 7, obtaining the back flocking synthetic leather.
The invention preferably comprises the following components: the wet-process substrate base is prepared from the following components in parts by weight: 36-38 parts of dimethylformamide, 13-15 parts of flame-retardant complexing agent, 0.2-0.25 part of penetrating agent, 0.7-0.75 part of emulsifying agent, 0.1 part of strong hydrophobic surfactant, 0.1-0.3 part of water-based color paste, 7-9 parts of synthetic fiber powder and 42-44 parts of polyurethane resin.
The invention preferably comprises the following components: the thickness of the dry laminated surface layer is 0.15-0.3 mm.
The invention preferably comprises the following components: the thickness of the base bass layer is 0.83 mm.
The invention preferably comprises the following components: the thickness of the scurf bonding layer is 0.15-0.25 mm.
The invention preferably comprises the following components: the electrostatic dermis is 0.01-0.03 mm.
The invention has the beneficial effects that:
the invention has the advantages that the surface effect is similar to that of genuine leather, the electrostatic flocking technology is adopted, the waste genuine leather scraps are implanted into the back of the leather, the fluff is fine and soft, the integral genuine leather feeling is improved, the quality is far higher than that of synthetic leather, a good consumption mode is provided for the genuine leather scraps, and the invention is suitable for mass consumers.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1
(1) Weighing the following raw materials in parts by weight: 36 parts of dimethylformamide, 13 parts of flame-retardant complexing agent, 0.2 part of penetrating agent, 0.7 part of emulsifier, 0.1 part of strong-hydrophobicity surfactant, 0.1 part of water-based color paste, 7 parts of synthetic fiber powder and 42 parts of polyurethane resin, uniformly mixing to prepare a wet-process coating, uniformly coating the wet-process coating on bacteriostatic base cloth, pre-solidifying the wet-process coating in a solution with the content of the dimethylformamide of 18%, penetrating the wet-process coating into the base cloth, washing, ironing in 12 rounds, fixing the wide width, drying, and cooling in a circulating cooling wheel to prepare the wet-process bass.
(2) And preparing a surface-bottom surface-coating paint by using soft polyurethane resin and toner, coating a surface-layer slurry with the thickness of 0.15mm on paper patterns in a scraping way, completely drying at the high temperature of 100 ℃, repeatedly operating a bottom material, and laminating the bottom material and the base material at the temperature of 110 ℃ by extruding through two silica gel wheels.
(3) Then, calendering at 100 ℃ and adjusting the surface luminosity to enable the surface luminosity to have a skin-shine effect; adding 3 parts of organic silicon slip auxiliary agent into 100 parts of deionized water, uniformly mixing, uniformly spraying on the surface of the synthetic leather in a spraying mode, and drying for 2 minutes at 120 ℃ to obtain a slip touch feeling; then coating flocking glue on the back; electrostatic planting leather scraps are used, drying is carried out, and then the non-adhered leather scraps are brushed away; finally obtaining the back flocking synthetic leather.
Example 2
(1) Weighing the following raw materials in parts by weight: the wet process coating is prepared by uniformly mixing 37 parts of dimethylformamide, 14 parts of flame-retardant complexing agent, 0.22 part of penetrating agent, 0.72 part of emulsifier, 0.1 part of strong-hydrophobicity surfactant, 0.2 part of water-based color paste, 8 parts of synthetic fiber powder and 43 parts of polyurethane resin, uniformly coating the coating on bacteriostatic base cloth, penetrating the wet process coating into the base cloth through a solution pre-solidification tank with the content of the dimethylformamide of 18%, washing, ironing in 12 rounds, fixing the wide width, drying, and cooling through a circulating cooling wheel to prepare the wet process bass.
(2) And preparing a surface-bottom surface-coating paint by using soft polyurethane resin and toner, coating a surface-layer slurry with the thickness of 0.15mm on paper patterns in a scraping way, completely drying at the high temperature of 110 ℃, repeatedly operating a bottom material, and laminating the bottom material and the base material at the temperature of 120 ℃ by extruding through two silica gel wheels.
(3) Then, carrying out calendaring treatment at 115 ℃ to adjust the surface luminosity so that the surface luminosity has a skin-shine effect; adding 4 parts of organic silicon slip auxiliary agent into 100 parts of deionized water, uniformly mixing, uniformly spraying on the surface of the synthetic leather in a spraying mode, and drying for 2.5 minutes at 125 ℃ to obtain a smooth touch feeling; then coating flocking glue on the back; electrostatic planting leather scraps are used, drying is carried out, and then the non-adhered leather scraps are brushed away; finally obtaining the back flocking synthetic leather.
Example 3
(1) Weighing the following raw materials in parts by weight: the wet process coating is prepared by uniformly mixing 38 parts of dimethylformamide, 14 parts of flame-retardant complexing agent, 0.25 part of penetrating agent, 0.75 part of emulsifier, 0.1 part of strong-hydrophobicity surfactant, 0.1 part of water-based color paste, 9 parts of synthetic fiber powder and 43 parts of polyurethane resin, uniformly coating the coating on bacteriostatic base cloth, penetrating the wet process coating into the base cloth through a solution pre-solidification tank with the content of the dimethylformamide of 18%, washing, ironing in 12 rounds, fixing the wide width, drying, and cooling through a circulating cooling wheel to prepare the wet process base cloth.
(2) And preparing a surface-bottom surface-coating paint by using soft polyurethane resin and toner, coating a surface layer slurry with the thickness of 0.15mm on paper patterns in a scraping way, completely drying at the high temperature of 120 ℃, repeatedly operating a bottom material, and laminating the bottom material and the bass at the temperature of 130 ℃ by extruding through two silica gel wheels.
(3) Then, the surface luminosity is adjusted through calendaring treatment at 130 ℃ so that the surface luminosity has the effect of skin-shine; adding 5 parts of organic silicon slip auxiliary agent into 100 parts of deionized water, uniformly mixing, uniformly spraying on the surface of the synthetic leather in a spraying mode, and drying for 3 minutes at 130 ℃ to obtain a slip touch feeling; then coating flocking glue on the back; electrostatic planting leather scraps are used, drying is carried out, and then the non-adhered leather scraps are brushed away; finally obtaining the back flocking synthetic leather.
Table 1 comparison of physical properties of the back flocking synthetic leather:
by comparing the surface touch, thickness, elasticity, hand feeling and air permeability of the back flocking synthetic leather prepared in the 3 embodiments, the synthetic leather in embodiment 2 has smooth touch, thinner thickness, better elasticity and hand feeling and stronger air permeability; compared with the synthetic leather prepared in other embodiments, embodiment 2 has wider application prospect.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a back flocking synthetic leather, includes base shellfish layer, its characterized in that: the dry-process laminated surface layer is adhered to the upper side of the base Bayes layer, the scurf adhesive layer is adhered to the other side of the base Bayes layer, and the electrostatic dermis layer is arranged on the lower side of the scurf adhesive layer.
2. The backside flocking synthetic leather of claim 1, wherein: the back flocking synthetic leather comprises the following manufacturing steps:
step 1, selecting weft-knitted suede-like base cloth to manufacture a wet-process base bass, wherein the hand feeling is extremely soft, and the elasticity is good;
step 2, configuring a surface and bottom facing coating by using soft polyurethane resin and toner, coating a surface layer slurry with the thickness of 0.15mm on paper patterns in a scraping way, completely drying the paper patterns at the high temperature of 120 ℃ after 100-plus-material drying, repeatedly operating a backing material, and extruding the backing material and the Bass by two silica gel wheels to be attached at the temperature of 100-120 ℃;
step 3.100-130 ℃ calendering treatment, adjusting the surface luminosity to enable the surface luminosity to have a skin-shine effect;
step 4, adding 3-5 parts of organic silicon slip auxiliary agent into 100 parts of deionized water, uniformly mixing, uniformly spraying the mixture on the surface of the synthetic leather in a spraying mode, and drying at the temperature of 120-130 ℃ for 2-3 minutes to obtain a smooth touch feeling;
step 5, coating flocking glue on the back;
step 6, planting the leather scraps electrostatically, drying and brushing off the non-adhered leather scraps;
and 7, obtaining the back flocking synthetic leather.
3. The backside flocking synthetic leather of claim 2, wherein: the wet-process substrate base is prepared from the following components in parts by weight: 36-38 parts of dimethylformamide, 13-15 parts of flame-retardant complexing agent, 0.2-0.25 part of penetrating agent, 0.7-0.75 part of emulsifying agent, 0.1 part of strong hydrophobic surfactant, 0.1-0.3 part of water-based color paste, 7-9 parts of synthetic fiber powder and 42-44 parts of polyurethane resin.
4. The backside flocking synthetic leather of claim 1, wherein: the thickness of the dry laminated surface layer is 0.15-0.3 mm.
5. The backside flocking synthetic leather of claim 1, wherein: the thickness of the base bass layer is 0.83 mm.
6. The backside flocking synthetic leather of claim 1, wherein: the thickness of the scurf bonding layer is 0.15-0.25 mm.
7. The backside flocking synthetic leather of claim 1, wherein: the electrostatic dermis is 0.01-0.03 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011110941.2A CN112391852A (en) | 2020-10-16 | 2020-10-16 | Back flocking synthetic leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011110941.2A CN112391852A (en) | 2020-10-16 | 2020-10-16 | Back flocking synthetic leather |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112391852A true CN112391852A (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011110941.2A Pending CN112391852A (en) | 2020-10-16 | 2020-10-16 | Back flocking synthetic leather |
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| CN (1) | CN112391852A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205152695U (en) * | 2015-11-19 | 2016-04-13 | 桐乡市龙翔纺织有限责任公司 | Single face fine hair leather surface fabric |
| CN207659768U (en) * | 2017-12-29 | 2018-07-27 | 江苏万马塑胶有限公司 | A kind of imitative regenerative leathers of PU |
| CN109056350A (en) * | 2018-09-06 | 2018-12-21 | 福建隆上超纤有限公司 | A kind of preparation method of organosilicon synthetic leather |
| CN110952338A (en) * | 2019-11-15 | 2020-04-03 | 清远市齐力合成革有限公司 | Super-simulation leather, cow and sheep crystal transparent synthetic leather fabric and preparation method thereof |
| CN110983799A (en) * | 2019-12-23 | 2020-04-10 | 清远市齐力合成革有限公司 | Soft wet base for synthetic leather and manufacturing method thereof |
| CN110983798A (en) * | 2019-12-23 | 2020-04-10 | 清远市齐力合成革有限公司 | Method for manufacturing ultra-soft yellowing-resistant water-based skin-feel synthetic leather |
-
2020
- 2020-10-16 CN CN202011110941.2A patent/CN112391852A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205152695U (en) * | 2015-11-19 | 2016-04-13 | 桐乡市龙翔纺织有限责任公司 | Single face fine hair leather surface fabric |
| CN207659768U (en) * | 2017-12-29 | 2018-07-27 | 江苏万马塑胶有限公司 | A kind of imitative regenerative leathers of PU |
| CN109056350A (en) * | 2018-09-06 | 2018-12-21 | 福建隆上超纤有限公司 | A kind of preparation method of organosilicon synthetic leather |
| CN110952338A (en) * | 2019-11-15 | 2020-04-03 | 清远市齐力合成革有限公司 | Super-simulation leather, cow and sheep crystal transparent synthetic leather fabric and preparation method thereof |
| CN110983799A (en) * | 2019-12-23 | 2020-04-10 | 清远市齐力合成革有限公司 | Soft wet base for synthetic leather and manufacturing method thereof |
| CN110983798A (en) * | 2019-12-23 | 2020-04-10 | 清远市齐力合成革有限公司 | Method for manufacturing ultra-soft yellowing-resistant water-based skin-feel synthetic leather |
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Application publication date: 20210223 |
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