CN108589322A - A kind of two-sided synthetic leather and preparation method thereof - Google Patents
A kind of two-sided synthetic leather and preparation method thereof Download PDFInfo
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- CN108589322A CN108589322A CN201810354655.7A CN201810354655A CN108589322A CN 108589322 A CN108589322 A CN 108589322A CN 201810354655 A CN201810354655 A CN 201810354655A CN 108589322 A CN108589322 A CN 108589322A
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- Prior art keywords
- layer
- synthetic leather
- adhesive linkage
- sided synthetic
- face
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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
- D06N3/145—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 two or more layers of polyurethanes
-
- 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
- D06N2209/14—Properties of the materials having chemical properties
- D06N2209/142—Hydrophobic
-
- 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
- D06N2209/14—Properties of the materials having chemical properties
- D06N2209/143—Inert, i.e. inert to chemical degradation, corrosion resistant
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses a kind of two-sided synthetic leather and preparation method thereof, from top to bottom respectively include the first overlay coating, basal layer and the second overlay coating, first overlay coating from top to bottom respectively includes the first face layer and the first adhesive linkage, the basal layer from top to bottom respectively includes compacted zone, the first foaming layer, the second foaming layer and tissue layer, and second overlay coating from top to bottom respectively includes the second adhesive linkage and the second face layer.Anti-hydrolytic performance of the present invention is good, high yield rate, and service life is long.
Description
Technical field
The present invention relates to a kind of synthetic leather, and in particular to a kind of two-sided synthetic leather and preparation method thereof.
Background technology
Synthetic leather is the plastic products simulated the Nomenclature Composition and Structure of Complexes of natural leather and can be used as its substitute material.Usually with through leaching
The non-woven fabrics of stain is lamina reticularis, and microvoid polyurethane layer is made as grain layer, is widely used in making shoes, boots, luggage and ball
Deng.Existing synthetic leather still has the toxic auxiliary material in part in making ingredient, and environmental-protecting performance is poor, and existing leather is generally list
Face, two-sided leather processing technique is immature, and production yield rate is low.Therefore, in order to avoid disadvantage existing in the prior art, have
Necessity makes improvement to the prior art.
Invention content
It is an object of the invention to overcome shortcoming and deficiency in the prior art, provide that a kind of water resistance is good, is produced into
The high two-sided synthetic leather of product rate.
Another object of the present invention is to improve a kind of two-sided synthetic leather preparation method.
The present invention is realized by following technical solution：
A kind of two-sided synthetic leather, from top to bottom respectively includes the first overlay coating, basal layer and the second overlay coating, and described first
Overlay coating from top to bottom respectively include the first face layer and the first adhesive linkage, the basal layer from top to bottom respectively include compacted zone,
First foaming layer, the second foaming layer and tissue layer, second overlay coating from top to bottom respectively include the second adhesive linkage and second
Face layer.
Further, first face layer, the first adhesive linkage and the second face layer respectively include 45% by mass percentage~
54.99% polyurethane resin, 45%~54.99% organic solvent and 0.01%~0.05% surfactant, the compacted zone,
First foaming layer and the second foaming layer respectively include 25%~38% polyurethane resin, 25%~38% diformazan by mass percentage
Base formamide and 24%~50% calcium carbonate, second adhesive linkage by mass percentage include 49%~89% polyalcohol,
0.4%~0.5% catalyst, 0.9%~1.5% functional aid and 9%~49% isocyanates.
Further, the organic solvent is one or more in dimethylformamide, ethyl acetate or butyl acetate.
Further, the catalyst is amines catalyst or metallic catalyst.
Further, the functional aid includes levelling agent and foam stabilizer.
Further, the first face layer, the first adhesive linkage and the second face layer respectively include 50% poly- ammonia by mass percentage
Ester resin, 49.95% organic solvent and 0.05% surfactant, the compacted zone, the first foaming layer and the second foaming layer are pressed
Mass percent respectively includes 25% polyurethane resin, 25% dimethylformamide and 50% calcium carbonate, second adhesive linkage
Include 78% polyalcohol, 0.5% catalyst, 1.5% functional aid and 20% isocyanates by mass percentage.
A kind of preparation method of two-sided synthetic leather, includes the following steps：
Step (1)：Prepare raw material, by 45%~54.99% polyurethane resin, 45%~54.99% organic solvent and
0.01%~0.05% surfactant is mixed to prepare dry method polyurethane slurry, by 25%~38% polyurethane resin, 25%~
38% dimethylformamide and 24%~50% calcium carbonate are mixed to prepare wet polyurethane slurry, by 49%~89% polyalcohol,
0.4%~0.5% catalyst, 0.9%~1.5% functional aid and 9%~49% isocyanates are mixed to prepare solvent-free slurry
Material；
Step (2)：Basal layer is prepared, wet polyurethane slurry is coated in tissue layer, and enters and contains organic solvent
Sink in solidify, after organic solvent is eluted using water, drying, finally cool down, be made basal layer；
Step (3)：The first overlay coating is prepared, dry method polyurethane slurry, drying are coated in release paper, drying temperature is
130 DEG C or more, the first face layer is made, then coats dry method polyurethane slurry on the layer of the first face, is dried to half-dried, drying temperature is
120 DEG C, the first adhesive linkage is made, is bonded the first adhesive linkage with basal layer upper surface by combined wheels, dry, drying temperature is
It 130 DEG C, finally cools down, separates release paper, two-sided synthetic leather semi-finished product are made；
Step (4)：The second overlay coating is prepared, dry method polyurethane slurry, drying are coated in release paper, drying temperature is
130 DEG C or more, the second face layer is made, then coats solvent-free slurry on the layer of the second face, is dried to half-dried, drying temperature 120
DEG C, the second adhesive linkage is made, is bonded the second adhesive linkage with basal layer lower face by combined wheels, dries, drying temperature 80
DEG C~150 DEG C, it finally cools down, separates release paper, two-sided synthetic leather products are made.
Further, a concentration of the 17%~30% of the organic solvent of the sink in the step (2).
Further, solvent-free slurry is coated by bottler placer in the step (4), and the bottler placer includes the first tank
Body and the second tank body are deposited in after the polyalcohol, catalyst and functional aid mixing in the first tank body, the isocyanates
It deposits in the second tank body.
Compared with the existing technology, the present invention in process of production, will not since the second overlay coating does not have organic solvent volatilization
Layer corrosion in face caused by organic solvent volatilization and lines damage are caused after secondary fitting, anti-hydrolytic performance is good, production yield rate
It is high.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the two-sided synthetic leather of the present invention.
In figure：The first overlay coatings of 1-；2- basal layers；The second overlay coatings of 3-；The first faces 4- layer；The first adhesive linkages of 5-；6- is caused
Close layer；The first foaming layers of 7-；The second foaming layers of 8-；9- tissue layers；The second adhesive linkages of 10-；The second faces 11- layer.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
As shown in Figure 1 the present invention a kind of two-sided synthetic leather, from top to bottom respectively include the first overlay coating 1, basal layer 2 and
Second overlay coating 3, the first overlay coating 1 from top to bottom respectively include the first face layer 4 and the first adhesive linkage 5, and basal layer 2 is from top to bottom
Compacted zone 6, the first foaming layer 7, the second foaming layer 8 and tissue layer 9 are respectively included, the second overlay coating 3 from top to bottom respectively includes
Second adhesive linkage 10 and the second face layer 11.
It is poly- that first face the 4, first adhesive linkage 5 of layer and the second face layer 11 respectively include 45%~54.99% by mass percentage
Urethane resin, 45%~54.99% organic solvent and 0.01%~0.05% surfactant, compacted zone 6, the first foaming layer 7
And second foaming layer 8 respectively include 25%~38% polyurethane resin, 25%~38% dimethylformamide by mass percentage
And 24%~50% calcium carbonate, the second adhesive linkage 10 include 49%~89% polyalcohol, 0.4%~0.5% by mass percentage
Catalyst, 0.9%~1.5% functional aid and 9%~49% isocyanates.Organic solvent is selected from dimethylformamide, second
It is one or more in acetoacetic ester or butyl acetate.Catalyst is amines catalyst or metallic catalyst.Functional aid packet
Include levelling agent and foam stabilizer.
As a kind of specific implementation, the first face the 4, first adhesive linkage 5 of layer and the second face layer 11 wrap respectively by mass percentage
Include 50% polyurethane resin, 49.95% organic solvent and 0.05% surfactant, compacted zone 6, the first foaming layer 7 and second
Foaming layer 8 respectively includes 25% polyurethane resin, 25% dimethylformamide and 50% calcium carbonate by mass percentage, and second is viscous
It includes 78% polyalcohol, 0.5% catalyst, 1.5% functional aid and 20% isocyanates to connect layer 10 by mass percentage.
A kind of preparation method of two-sided synthetic leather, includes the following steps：
Step (1)：Prepare raw material, by 45%~54.99% polyurethane resin, 45%~54.99% organic solvent and
0.01%~0.05% surfactant is mixed to prepare dry method polyurethane slurry, by 25%~38% polyurethane resin, 25%~
38% dimethylformamide and 24%~50% calcium carbonate are mixed to prepare wet polyurethane slurry, by 49%~89% polyalcohol,
0.4%~0.5% catalyst, 0.9%~1.5% functional aid and 9%~49% isocyanates are mixed to prepare solvent-free slurry
Material.
Step (2)：Basal layer is prepared, wet polyurethane slurry is coated in tissue layer 9, and enters and contains organic solvent
Sink in solidify, after eluting organic solvent using water, drying finally cools down, and basal layer 2 is made；Sink it is organic molten
A concentration of the 17%~30% of agent.From top to bottom there is compacted zone 6, the first foaming layer 7 and the after the processing of wet polyurethane slurry
Two foaming layers 8.
Step (3)：The first overlay coating 1 is prepared, dry method polyurethane slurry, drying are coated in release paper, drying temperature is
130 DEG C or more, the first face layer 4 is made, then coats dry method polyurethane slurry on the first face layer 4, is dried to half-dried, drying temperature
It is 120 DEG C, the first adhesive linkage 5 is made, is bonded the first adhesive linkage 5 with 2 upper surface of basal layer by combined wheels, dries, drying
Temperature is 130 DEG C, finally cools down, separates release paper, and two-sided synthetic leather semi-finished product are made.
Step (4)：The second overlay coating 3 is prepared, dry method polyurethane slurry, drying are coated in release paper, drying temperature is
130 DEG C or more, the second face layer 11 is made, then coats solvent-free slurry on the second face layer 11, is dried to half-dried, drying temperature is
120 DEG C, the second adhesive linkage 10 is made, is bonded the second adhesive linkage 10 with 2 lower face of basal layer by combined wheels, dries, drying
Temperature is 80 DEG C~150 DEG C, finally cools down, separates release paper, and two-sided synthetic leather products are made.Solvent-free slurry passes through perfusion
Machine is coated, and bottler placer includes the first tank body and the second tank body, is deposited in after polyalcohol, catalyst and functional aid mixing
In first tank body, isocyanates is deposited in the second tank body, when production bottler placer according to the linear speed of production line, coating thickness come into
Row metering is mixed and is coated with.Traditional handicraft is the organic solvent evaporation heated in polyurethane slurry, and present invention heating is to add
Fast polyalcohol is reacted with isocyanates so that heating temperature range is big, and can be whole according to production line velocity modulation.
Anti-hydrolytic performance of the present invention is good, scratch resistance, and production yield rate is up to 99.5%, and two-sided synthetic leather has two kinds of colors and flower
Line.First overlay coating 1 is existing Synthetic Leather product, and the requirement of existing Synthetic Leather product is：Stripping
Intensity is 0.3kg.f/cm~1.5kg.f/cm, impregnated 48 hours in 10% sodium hydroxide solution or more, peel strength reduces by 10
~20%, the parts per million concentration of dimethylformamide be 200ppm~600ppm (<1000ppm)；Second overlay coating 3 of the invention
Peel strength be 1kg.f/cm~7kg.f/cm, impregnated 48 hours or more in 10% sodium hydroxide solution, peel strength only drops
Low 1%~5%, the parts per million concentration of dimethylformamide is 0ppm~50ppm.The present invention combines two of the finished product after production
Methylformamide content≤500ppm, product is two-sided after testing neither has gas permeability, and two-sided water proofing property, moisture-inhibiting index
Less than 0.05g/m2*24hrs (ASTM E96BW 2000 editions), and by testing the relatively existing poly- ammonia of its anti-hydrolytic performance
Lipase absobed removes from office product and increases by 10%, and product service life reaches 5~10 years.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (9)
1. a kind of two-sided synthetic leather, it is characterised in that：From top to bottom respectively include the first overlay coating, basal layer and the second veneer
Layer, first overlay coating from top to bottom respectively includes the first face layer and the first adhesive linkage, the basal layer are from top to bottom distinguished
Including compacted zone, the first foaming layer, the second foaming layer and tissue layer, it is viscous that second overlay coating from top to bottom respectively includes second
Connect layer and the second face layer.
2. two-sided synthetic leather according to claim 1, it is characterised in that：The first face layer, the first adhesive linkage and second
Face layer respectively includes 45%~54.99% polyurethane resin, 45%~54.99% organic solvent and 0.01% by mass percentage
~0.05% surfactant, the compacted zone, the first foaming layer and the second foaming layer respectively include 25% by mass percentage
~38% polyurethane resin, 25%~38% dimethylformamide and 24%~50% calcium carbonate, second adhesive linkage press matter
Measure percentage include 49%~89% polyalcohol, 0.4%~0.5% catalyst, 0.9%~1.5% functional aid and 9%~
49% isocyanates.
3. two-sided synthetic leather according to claim 2, it is characterised in that：The organic solvent be selected from dimethylformamide,
It is one or more in ethyl acetate or butyl acetate.
4. two-sided synthetic leather according to claim 2, it is characterised in that：The catalyst is amines catalyst or metal
Catalyst.
5. two-sided synthetic leather according to claim 2, it is characterised in that：The functional aid includes levelling agent and foam stabilizing
Agent.
6. two-sided synthetic leather according to claim 2, it is characterised in that：The first face layer, the first adhesive linkage and second
Face layer respectively includes 50% polyurethane resin, 49.95% organic solvent and 0.05% surfactant by mass percentage, described
Compacted zone, the first foaming layer and the second foaming layer respectively include 25% polyurethane resin, 25% dimethyl methyl by mass percentage
Amide and 50% calcium carbonate, second adhesive linkage include 78% polyalcohol, 0.5% catalyst, 1.5% work(by mass percentage
It can property auxiliary agent and 20% isocyanates.
7. a kind of preparation method of two-sided synthetic leather, it is characterised in that：Include the following steps：
Step (1)：Prepare raw material, by 45%~54.99% polyurethane resin, 45%~54.99% organic solvent and
0.01%~0.05% surfactant is mixed to prepare dry method polyurethane slurry, by 25%~38% polyurethane resin, 25%~
38% dimethylformamide and 24%~50% calcium carbonate are mixed to prepare wet polyurethane slurry, by 49%~89% polyalcohol,
0.4%~0.5% catalyst, 0.9%~1.5% functional aid and 9%~49% isocyanates are mixed to prepare solvent-free slurry
Material；
Step (2)：Basal layer is prepared, wet polyurethane slurry is coated in tissue layer, and enters the water containing organic solvent
It is solidified in slot, after eluting organic solvent using water, drying finally cools down, and basal layer is made；
Step (3)：The first overlay coating is prepared, dry method polyurethane slurry, drying are coated in release paper, drying temperature is 130 DEG C
More than, the first face layer is made, then coats dry method polyurethane slurry on the layer of the first face, is dried to half-dried, drying temperature 120
DEG C, the first adhesive linkage is made, is bonded the first adhesive linkage with basal layer upper surface by combined wheels, dries, drying temperature 130
DEG C, it finally cools down, separates release paper, two-sided synthetic leather semi-finished product are made；
Step (4)：The second overlay coating is prepared, dry method polyurethane slurry, drying are coated in release paper, drying temperature is 130 DEG C
More than, be made the second face layer, then the second face layer on coat solvent-free slurry, be dried to it is half-dried, drying temperature be 120 DEG C, system
The second adhesive linkage, the second adhesive linkage be bonded with basal layer lower face by combined wheels, drying, drying temperature for 80 DEG C~
It 150 DEG C, finally cools down, separates release paper, two-sided synthetic leather products are made.
8. the preparation method of two-sided synthetic leather according to claim 7, it is characterised in that：Sink in the step (2)
Organic solvent a concentration of 17%~30%.
9. the preparation method of two-sided synthetic leather according to claim 7, it is characterised in that：It is solvent-free in the step (4)
Slurry is coated by bottler placer, and the bottler placer includes the first tank body and the second tank body, the polyalcohol, catalyst and work(
It can be deposited in the first tank body after the mixing of property auxiliary agent, the isocyanates is deposited in the second tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810354655.7A CN108589322A (en) | 2018-04-19 | 2018-04-19 | A kind of two-sided synthetic leather and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810354655.7A CN108589322A (en) | 2018-04-19 | 2018-04-19 | A kind of two-sided synthetic leather and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108589322A true CN108589322A (en) | 2018-09-28 |
Family
ID=63611224
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810354655.7A Pending CN108589322A (en) | 2018-04-19 | 2018-04-19 | A kind of two-sided synthetic leather and preparation method thereof |
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| CN109252384A (en) * | 2018-10-18 | 2019-01-22 | 清远市齐力合成革有限公司 | A kind of two-sided leather of Environment-friendlywear-resistant wear-resistant scratch resistance |
| CN109652994A (en) * | 2018-11-30 | 2019-04-19 | 安徽安利材料科技股份有限公司 | Two-sided no folding line no-solvent polyurethane luggage synthetic leather of one kind and preparation method thereof |
| CN110318263A (en) * | 2019-07-26 | 2019-10-11 | 兰州科天新材料股份有限公司 | A kind of aqueous cushion leather and preparation method thereof |
| CN113123143A (en) * | 2019-12-31 | 2021-07-16 | 苏州瑞高新材料有限公司 | High-peeling-force PU double-sided leather and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109252384A (en) * | 2018-10-18 | 2019-01-22 | 清远市齐力合成革有限公司 | A kind of two-sided leather of Environment-friendlywear-resistant wear-resistant scratch resistance |
| CN109652994A (en) * | 2018-11-30 | 2019-04-19 | 安徽安利材料科技股份有限公司 | Two-sided no folding line no-solvent polyurethane luggage synthetic leather of one kind and preparation method thereof |
| CN110318263A (en) * | 2019-07-26 | 2019-10-11 | 兰州科天新材料股份有限公司 | A kind of aqueous cushion leather and preparation method thereof |
| CN113123143A (en) * | 2019-12-31 | 2021-07-16 | 苏州瑞高新材料有限公司 | High-peeling-force PU double-sided leather and preparation method thereof |
| CN113123143B (en) * | 2019-12-31 | 2023-04-28 | 苏州瑞高新材料有限公司 | High-peeling-force PU double-sided leather and preparation method thereof |
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Application publication date: 20180928 |