CN107385941B - Breathable elastic leather grain hydrolysis-resistant polyurethane leather and preparation method thereof - Google Patents
Breathable elastic leather grain hydrolysis-resistant polyurethane leather and preparation method thereof Download PDFInfo
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- CN107385941B CN107385941B CN201710727029.3A CN201710727029A CN107385941B CN 107385941 B CN107385941 B CN 107385941B CN 201710727029 A CN201710727029 A CN 201710727029A CN 107385941 B CN107385941 B CN 107385941B
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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
- D06N3/0002—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
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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
- D06N3/007—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
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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
- D06N3/0086—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
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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
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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
- D06N2209/00—Properties of the materials
- D06N2209/12—Permeability or impermeability properties
- D06N2209/121—Permeability to gases, adsorption
- D06N2209/123—Breathable
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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
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1607—Degradability
- D06N2209/1621—Water-soluble, water-dispersible
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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
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1635—Elasticity
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- 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 breathable elastic leather hydrolysis-resistant polyurethane leather and a preparation method thereof. The elastic knitted fabric with raised two sides is used as base cloth; sequentially coating the surface layer slurry and the intermediate layer slurry on release paper, and drying and curing to respectively form a surface layer and an intermediate layer; taking low-modulus polyether polyurethane resin SA-36 as a bonding layer, coating the bonding layer on an intermediate layer, attaching the bonding layer to the elastic knitted fabric, drying, cooling and stripping release paper to obtain a semi-finished product; and (4) carrying out dry kneading on the obtained semi-finished product in a continuous kneading machine for 10-15 minutes to obtain a finished product. The elastic leather grain hydrolysis-resistant polyurethane shoe lining leather has excellent air permeability, and the leather grain effect and the hand feeling are similar to those of real leather shoe lining leather.
Description
Technical Field
The invention relates to preparation of polyurethane synthetic leather, in particular to breathable elastic leather hydrolysis-resistant polyurethane leather and a preparation method thereof.
Background
The natural leather, also called as genuine leather, is a natural polymer material obtained by the physical and chemical processing of animal leather such as unhairing, tanning and the like, and becomes the best fabric for manufacturing shoes due to the characteristics of softness, comfort, durability and air permeability. However, since the dermis is produced from animal epidermis, it cannot be mass-produced and cannot satisfy the increasing demand of human beings. The synthetic leather product has rich and various appearances and hand feeling similar to real leather, thereby becoming the most ideal substitute of natural leather.
Compared with natural leather, the synthetic leather products in the current market are often stiff in hand feeling and insufficient in leather feeling, so that the application and popularization of the synthetic leather on high-grade shoe products are limited. Meanwhile, the synthetic leather product has the problem of poor air permeability, and the phenomenon of stuffy feet when the shoes are worn after being made; in addition, shoe lining leather is easy to be hydrolyzed and pulverized after being contacted with foot sweat for a long time, and the durability of the shoe is affected.
Along with the improvement of living standard, people put forward higher requirements on the comfortableness and the durability of shoes, and the shoe lining leather with good leather grain effect and excellent hydrolysis resistance is developed, can meet the requirements of consumers, expands the application of synthetic leather in the market of high-grade shoes, and has an optimistic market advance.
Disclosure of Invention
The invention aims to provide the breathable elastic leather-grain hydrolysis-resistant polyurethane leather and the preparation method thereof.
A breathable elastic leather grain hydrolysis-resistant polyurethane leather comprises base cloth, wherein a bonding layer is bonded to the surface of the base cloth, and an anti-sticking layer is coated on the surface of the bonding layer through a middle layer; the bonding layer slurry is prepared from the following components in parts by weight:
in a further scheme, the base cloth is an elastic knitted cloth with two raised surfaces.
In a further scheme, the middle layer slurry is prepared from the following components in parts by weight:
according to a further scheme, the anti-sticking layer slurry is prepared from the following components in parts by weight:
the invention also aims to provide a preparation method of the breathable elastic grain hydrolysis-resistant polyurethane leather, which comprises the following steps:
(1) coating the anti-sticking layer slurry on release paper in a gapless coating and scraping mode, and drying and curing to form an anti-sticking layer; coating the intermediate layer slurry on the anti-sticking layer according to a gap of 0.15-0.20 mm, and drying and curing to form an intermediate layer;
(2) coating the adhesive layer slurry on the intermediate layer to form an adhesive layer with the thickness of 0.10-0.15mm, attaching the base cloth on the adhesive layer, drying at the temperature of 120-140 ℃, and cooling and stripping the release paper to obtain a semi-finished product;
(3) and (5) carrying out dry kneading on the semi-finished product in a continuous kneading machine for 10-15 minutes to obtain a finished product.
Further, the temperature for drying and curing in the step (1) is 100-130 ℃.
The polyether polyurethane resins SA-36, L T-95 and ST-8030PC are produced by Nippon polyurethane new material company Limited, wherein L T-95 has high modulus and has dry and wear-resistant effects, ST-8030PC has low modulus and soft hand feeling, SA-36 has the characteristics of low modulus, soft hand feeling and excellent hydrolysis resistance, the flatting agent BYK-9565 is a flatting agent produced by German Bike chemical additives, color paste and a solvent DMF (N, N-dimethylformamide) are commercially available, and solvents ETAC (ethyl acetate) and DMF (N, N-dimethylformamide) are commercially available.
The hand feeling and the air permeability of the finished leather are adjusted by mainly adjusting the coating thickness of the middle layer and the proportion of the bonding layer, wherein the bonding layer takes ETAC and DMF as solvents, the polarity of ETAC is weak, the corrosion capability to the middle layer is weak, the penetration to a cloth base is less, and the hand feeling after the bonding is soft; the DMF has strong polarity, strong erosion capacity to the intermediate layer, and can promote the opening of the intermediate layer and increase the air permeability; but the adhesive has much penetration to the cloth base and has slightly poor hand feeling after being attached. According to the invention, the product with the hand feeling and the air permeability meeting the requirements can be obtained by adjusting the solvent ratio of the bonding layer, the process is simple to operate, and processes such as adding an air permeability auxiliary agent or punching by needling, forming holes on the surface and the like are not needed.
In addition, compared with the traditional polyurethane synthetic leather, the polyurethane synthetic leather has the outstanding characteristics that:
(1) the polyurethane leather prepared by the invention has excellent air permeability and can be used as shoe lining leather;
(2) the polyurethane leather prepared by the invention has soft hand feeling and ideal dermatoglyph effect, and has the effect similar to that of the lining leather of the pigskin shoes;
(3) the polyurethane leather prepared by the invention has ideal hydrolysis resistance due to no wet foaming layer, and the durability of the polyurethane leather is obviously improved.
Detailed Description
The technical solution of the present invention is further described below by way of embodiments, but the specific embodiments of the present invention are not limited thereto, and all equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Example 1:
(1) the elastic knitted fabric with raised two sides is used as base fabric, is commercially available and is selected from 0.55 Terra velvet of Hainin Jubang warp knitting Co.
(2) Coating the anti-sticking layer slurry on release paper in a gapless coating and scraping mode, drying and curing at 100 ℃ to form an anti-sticking layer, coating the middle layer slurry on a surface layer according to the thickness of 0.16mm, and drying and curing at 120 ℃ to form a middle layer.
The formula of the anti-sticking layer slurry comprises the following components in parts by mass:
the formula of the middle layer slurry comprises the following components in parts by mass:
(3) and (3) taking polyether polyurethane resin SA-36 as a bonding layer, coating the bonding layer on the intermediate layer prepared in the step (2) according to the thickness of 0.13mm, attaching the bonding layer to the long rough surface of the double-faced napped elastic knitted fabric, drying at 130 ℃, cooling and stripping release paper to obtain a semi-finished product.
The formula of the bonding layer slurry comprises the following components in parts by weight:
polyether polyurethane resin SA-36100
ETAC 30
(4) The semi-finished product obtained in the step (3) is dry-kneaded in a continuous graining machine for 10 minutes to obtain a finished product, the synthetic leather prepared by the process has slightly poor air permeability, and the air permeability test result is 700m L/cm2H, but soft hand.
Example 2:
(1) the elastic knitted fabric with raised two sides is used as base fabric, is commercially available and is selected from 0.55 Terra velvet of Hainin Jubang warp knitting Co.
(2) Coating the anti-sticking layer slurry on release paper in a gapless coating and scraping mode, drying and curing at 120 ℃ to form an anti-sticking layer, coating the middle layer slurry on a surface layer according to the thickness of 0.15mm, and drying and curing at 120 ℃ to form a middle layer.
The formula of the anti-sticking layer slurry comprises the following components in parts by mass:
the formula of the middle layer slurry comprises the following components in parts by mass:
(3) and (3) taking polyether polyurethane resin SA-36 as a bonding layer, coating the bonding layer on the intermediate layer prepared in the step (2) according to the thickness of 0.13mm, attaching the bonding layer to the long rough surface of the double-faced napped elastic knitted fabric, drying at 120 ℃, cooling and stripping release paper to obtain a semi-finished product.
The formula of the bonding layer slurry comprises the following components in parts by weight:
polyether polyurethane resin SA-36100
ETAC 20
DMF 10
(4) The semi-finished product obtained in the step (3) is dry-kneaded in a continuous graining machine for 10 minutes to obtain a finished product, the synthetic leather prepared by the process has excellent air permeability, and the air permeability test result is 3200m L/cm2H, and softer hand.
Example 3:
(1) the elastic knitted fabric with raised two sides is used as base fabric, is commercially available and is selected from 0.55 Terra velvet of Hainin Jubang warp knitting Co.
(2) Coating the anti-sticking layer slurry on release paper in a gapless coating and scraping mode, drying and curing at 130 ℃ to form an anti-sticking layer, coating the middle layer slurry on a surface layer according to the thickness of 0.17mm, and drying and curing at 120 ℃ to form a middle layer.
The formula of the anti-sticking layer slurry comprises the following components in parts by mass:
the formula of the middle layer slurry comprises the following components in parts by mass:
(3) and (3) taking polyether polyurethane resin SA-36 as a bonding layer, coating the bonding layer on the intermediate layer prepared in the step (2) according to the thickness of 0.13mm, attaching the bonding layer to the long rough surface of the double-faced napped elastic knitted fabric, drying at 130 ℃, cooling and stripping release paper to obtain a semi-finished product.
The formula of the bonding layer slurry comprises the following components in parts by weight:
polyether polyurethane resin SA-36100
ETAC 10
DMF 20
(4) And (4) carrying out dry kneading on the semi-finished product obtained in the step (3) in a continuous kneading machine for 10 minutes to obtain a finished product.
Is prepared by the processThe synthetic leather has very good air permeability, and the air permeability test result is 4900m L/cm2H but slightly less hand.
The air permeability of the conventional synthetic leather product is basically 0-300 m L/cm2H, the air permeability of the dermis product is basically 500-2500 m L/cm2H, and the ventilation quantity in the pigskin shoes is 8000-10000 m L/cm2*h。
Therefore, the air permeability of the product prepared by the invention can reach 2000-3000 m L/cm on the premise of ensuring the softness2H, is an ideal dermal substitute.
The embodiment is only used for illustration of the technical content of the invention, but the essence of the invention is not limited to the above embodiment, and one skilled in the art can and should understand that any changes and modifications based on the spirit of the invention should fall into the protection scope of the invention.
The invention has excellent air permeability, soft hand feeling and leather-like grains, has excellent hydrolysis resistance, and is particularly suitable for replacing pigskin or sheepskin and being used for high-grade shoe lining leather products.
Claims (3)
1. The utility model provides a ventilative type elasticity dermatoglyph hydrolysis-resistant polyurethane leather, includes base cloth, its characterized in that: the surface of the base cloth is adhered with a bonding layer, and the surface of the bonding layer is coated with an anti-sticking layer through an intermediate layer; the bonding layer slurry is prepared from the following components in parts by weight:
120 portions of polyether type polyurethane resin SA-3680-
20-30 parts of ETAC
10 parts of DMF;
the middle layer slurry is prepared from the following components in parts by weight:
80-120 parts of polyether type polyurethane resin ST-8030PC
40-60 parts of DMF
10-20 parts of color paste and/or toner
0.50-78 parts of a leveling agent BYK-95650.10;
the base cloth is an elastic knitted cloth with two raised surfaces;
the preparation method comprises the following steps:
(1) coating the anti-sticking layer slurry on release paper in a gapless coating and scraping mode, and drying and curing to form an anti-sticking layer; coating the intermediate layer slurry on the anti-sticking layer according to the thickness of 0.15-0.20 mm, and drying and curing to form an intermediate layer;
(2) coating the adhesive layer slurry on the intermediate layer to form an adhesive layer with the thickness of 0.10-0.15mm, attaching the base cloth on the adhesive layer, drying at the temperature of 120-140 ℃, and cooling and stripping the release paper to obtain a semi-finished product;
(3) and (5) carrying out dry kneading on the semi-finished product in a continuous kneading machine for 10-15 minutes to obtain a finished product.
2. The breathable elastic leather-grain hydrolysis-resistant polyurethane leather according to claim 1, characterized in that: the anti-sticking layer slurry is prepared from the following components in parts by weight:
polyether urethane resin L T-9580-120 parts
40-60 parts of DMF
2-10 parts of color paste and/or toner
And 0.50 part of a leveling agent BYK-95650.10.
3. The breathable elastic leather-grain hydrolysis-resistant polyurethane leather according to claim 1, characterized in that: the temperature for drying and curing in the step (1) is 100-130 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727029.3A CN107385941B (en) | 2017-08-22 | 2017-08-22 | Breathable elastic leather grain hydrolysis-resistant polyurethane leather and preparation method thereof |
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| CN201710727029.3A CN107385941B (en) | 2017-08-22 | 2017-08-22 | Breathable elastic leather grain hydrolysis-resistant polyurethane leather and preparation method thereof |
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| CN107385941A CN107385941A (en) | 2017-11-24 |
| CN107385941B true CN107385941B (en) | 2020-07-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110130118A (en) * | 2019-05-13 | 2019-08-16 | 浙江禾欣新材料有限公司 | A kind of preparation method for not losing thick and soft suction line super fiber leather |
| CN110205836A (en) * | 2019-05-13 | 2019-09-06 | 浙江禾欣新材料有限公司 | A kind of white shoes super fiber leather and preparation method thereof of resistance to vulcanization xanthochromia |
| CN113684693A (en) * | 2021-08-04 | 2021-11-23 | 安徽安利材料科技股份有限公司 | Polyurethane synthetic leather for regenerated fiber water-based electronic product and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233846A (en) * | 2014-09-26 | 2014-12-24 | 安徽安利合成革股份有限公司 | 2A high-solid certificate packaging leather and producing method thereof |
| CN105401459A (en) * | 2015-10-26 | 2016-03-16 | 鹤山市新科达企业有限公司 | Dry-process synthetic leather and preparation method thereof |
| CN106283682A (en) * | 2016-10-24 | 2017-01-04 | 何英伦 | A kind of novel fabric formula and manufacture method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233846A (en) * | 2014-09-26 | 2014-12-24 | 安徽安利合成革股份有限公司 | 2A high-solid certificate packaging leather and producing method thereof |
| CN105401459A (en) * | 2015-10-26 | 2016-03-16 | 鹤山市新科达企业有限公司 | Dry-process synthetic leather and preparation method thereof |
| CN106283682A (en) * | 2016-10-24 | 2017-01-04 | 何英伦 | A kind of novel fabric formula and manufacture method |
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