CN110983798A - Method for manufacturing ultra-soft yellowing-resistant water-based skin-feel synthetic leather - Google Patents
Method for manufacturing ultra-soft yellowing-resistant water-based skin-feel synthetic leather Download PDFInfo
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- CN110983798A CN110983798A CN201911333108.1A CN201911333108A CN110983798A CN 110983798 A CN110983798 A CN 110983798A CN 201911333108 A CN201911333108 A CN 201911333108A CN 110983798 A CN110983798 A CN 110983798A
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- 238000004383 yellowing Methods 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000002649 leather substitute Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 238000010409 ironing Methods 0.000 claims abstract description 28
- 239000004814 polyurethane Substances 0.000 claims abstract description 26
- 239000004744 fabric Substances 0.000 claims abstract description 24
- 230000008033 biological extinction Effects 0.000 claims abstract description 21
- 229920002635 polyurethane Polymers 0.000 claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 57
- 238000001035 drying Methods 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 36
- 238000000576 coating method Methods 0.000 claims description 36
- 229920005989 resin Polymers 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 28
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 21
- 239000010985 leather Substances 0.000 claims description 16
- 239000011527 polyurethane coating Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 9
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- 239000012756 surface treatment agent Substances 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 239000003945 anionic surfactant Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002932 luster Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 abstract 2
- 239000011265 semifinished product Substances 0.000 abstract 2
- 238000004049 embossing Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 abstract 1
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 4
- 238000007712 rapid solidification Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 230000001114 myogenic effect Effects 0.000 description 2
- 230000022379 skeletal muscle tissue development Effects 0.000 description 2
- 239000013032 Hydrocarbon resin Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- D06N3/145—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
- D06N2209/14—Properties of the materials having chemical properties
- D06N2209/146—Soilproof, soil repellent
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention relates to the field of synthetic leather, in particular to a method for manufacturing ultra-soft yellowing-resistant polyurethane synthetic leather, which comprises a base cloth layer, a wet-method base layer and a dry-method polyurethane layer coated on the wet-method base layer, wherein a plate is coated on the yellowing-resistant treatment layer on the dry-method polyurethane layer, a pattern-absorbing semi-finished product is obtained on the yellowing-resistant treatment layer through high-temperature pattern absorption, an extinction treatment layer coated on the pattern-absorbing semi-finished product, and a water-based lustring layer coated on the extinction treatment layer. The invention researches a super-soft bass which has strong silky feeling on the surface, good resilience performance, soft bass but not empty hand feeling, and very clear lines after embossing or absorbing the lines. By structurally adding the yellowing resistant layer and improving the manufacturing method of the extinction treatment layer, the synthetic leather product has excellent physical and chemical properties such as yellowing resistance, dry and comfortable surface hand feeling, skin feeling and the like, and the skin feeling and the ironing effect in the aqueous treatment agent are exerted, so that the surface hand feeling of the product is smoother.
Description
Technical Field
The invention relates to the field of synthetic leather, and particularly relates to a method for manufacturing ultra-soft yellowing-resistant aqueous skin-feel synthetic leather.
Background
Synthetic leather has higher market share as a substitute of genuine leather, but the situation faced by the industry is more and more severe, and the requirements of consumers on hand feeling, surface effect, physical and chemical properties, environmental protection and the like are more and more strict. The existing synthetic leather products which can simultaneously meet the requirements of soft hand feeling and excellent physicochemical properties in the market have a large development space.
Disclosure of Invention
The invention aims to provide a method for manufacturing ultra-soft yellowing-resistant water-based skin-feel synthetic leather, and aims to solve the technical problems of improving the touch feeling of the synthetic leather and improving the yellowing-resistant capability.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for manufacturing ultra-soft yellowing-resistant water-based skin-feel synthetic leather comprises the following steps:
(1) preparing a wet coating: adding 41-42 parts of N, N-dimethylformamide, 0.3-0.4 part of penetrating agent, 0.8-0.9 part of emulsifying agent, 0.1 part of strong hydrophobic surfactant, 0.1-0.3 part of water-based color paste, 10-11 parts of synthetic fiber powder and 45-47 parts of high-elasticity super-soft wet PU resin into a reaction kettle in sequence, uniformly stirring, vacuumizing for 50-60min, and filtering by using a 60-80 mesh net to prepare the wet coating;
manufacturing a wet method base layer: cleaning a high-F matt velvet base fabric with the thickness of 0.7mm in clear water, ironing the base fabric uniformly by using a fabric ironing wheel, ironing the base fabric, ironing partial moisture, uniformly coating the wet coating prepared in the step (1) on the base fabric, penetrating the wet coating into the base fabric through a solution pre-solidification tank with the content of N, N-dimethylformamide of 18%, washing, ironing by 12 rounds, fixing the broad width, drying, and cooling by using a circulating cooling wheel to prepare wet base fabric;
(2) preparing a dry-process polyurethane layer: preparing a dry polyurethane coating: and diluting the yellowing-resistant resin with a solvent according to a ratio. Weighing 6-7g of yellowing-resistant toner, adding the yellowing-resistant toner into 100 parts of diluted resin, stirring for 5-10min, and uniformly dissolving the toner into the resin by a stirrer to prepare the dry-process polyurethane coating;
coating the dry-process polyurethane coating on release paper through a precise coating platform, wherein the coating thickness is 0.15mm, and drying in an oven at the temperature of 110-;
coating a layer of dry polyurethane coating on the dried coating, wherein the coating thickness is 0.15mm, and drying in an oven at the temperature of 110-;
placing the wet base in an oven at the temperature of 110-;
and (3) attaching the coating layer dried in the step (3) to the softened wet base through a high-pressure roller, drying the coating layer through an oven at the temperature of 120-150 ℃, and stripping release paper and veneering leather to obtain a dry polyurethane layer.
(3) Preparing a yellowing-resistant treatment layer: treating the yellowing-resistant extinction treatment agent on the dry-process polyurethane layer through a mesh wheel, and drying the dry-process polyurethane layer through a drying oven at the temperature of 120-150 ℃ to prepare a yellowing-resistant treatment layer;
(4) manufacturing the absorption line layer: heating the flower suction machine to 170-180 ℃, preheating the leather, quickly spreading the front side of the preheated leather on the grain road surface of the flower suction plate, tightly adhering for 30-40s, and removing the leather to obtain a grain suction layer;
(5) preparation of the matting layer: treating the extinction treatment agent on the absorption line layer through a mesh wheel, and drying the absorption line layer through a drying oven at the temperature of 120-;
(6) preparing a water-based luster finishing layer: adding 2 parts of curing agent into 100 parts of aqueous ironing treatment agent, uniformly stirring at a high speed by a stirrer to prepare a mixture A, treating the mixture A on an extinction treatment layer through a mesh wheel, and drying through a drying oven at 150 ℃ under 130-.
Preferably, the penetrating agent in the wet coating prepared in the step (1) is a compound of an anionic surfactant, the emulsifier is a negative nonionic surfactant, and the PU resin is a high-elasticity super-soft PU resin for embossed clothes.
Preferably, all the raw materials in the wet coating prepared in the step (1) are added while stirring, and the stirring speed is 35-45 r/min.
Preferably, the temperature of the cloth ironing wheel in the wet-process bass layer manufactured in the step (1) is 85 ℃, the temperature of the pre-coagulation tank is 30 ℃, the temperature of the 12-wheel ironing is 140 ℃, the fixed width is 1.35m, and the temperature during drying is 150 ℃.
Preferably, the yellowing-resistant resin in the dry-process polyurethane layer prepared in the step (2) is non-yellowing aliphatic solvent-resistant dry-process surface layer resin, the viscosity is 6-12 ten thousand mPa · s, the dilution ratio of the yellowing-resistant resin to the solvent is 90 parts of yellowing-resistant resin, 70 parts of acetone solution and 20 parts of dimethylformamide solution are uniformly mixed, the rotating speed of a stirrer is 4000-.
Preferably, the mesh wheel in the yellowing-resistant treatment layer prepared in the step (3) is 16 meshes of 220 meshes.
Preferably, the linear speed of the conveying belt is 6-8m/min when the leather material is preheated in the texture absorbing layer manufactured in the step (4).
Preferably, the matting agent in the matting layer prepared in the step (5) is a strong matting surface treating agent, the viscosity is 500-1000cps, and the mesh wheel used in the matting layer is 180-mesh for 20 times.
Preferably, the curing agent in the step (6) for preparing the water-based lustring layer is a cross-linking agent, the water-based lustring treatment agent is a water-based skin feel treatment agent and is matched with the curing agent for use, and the mesh wheel in the step for preparing the water-based lustring layer is 10 mesh wheels for 300 mesh treatment.
The invention has the beneficial effects that:
according to the invention, the penetrant is added in the manufacturing process of the wet-process bass to accelerate the solidification speed, increase the foam pores, improve the myogenic property and reduce the production cost, the anionic nonionic surfactant is used as an emulsifier to effectively slow down the rapid solidification of the surface in the wet-process PU solidification process, the foam pore architecture is adjusted, so that the foam pores are fine and uniform, the bass thick feeling is enhanced, and the PU resin is added to enable the bass to have the characteristics of high myogenic property, strong meat feeling, high elasticity, super softness and the like; the anti-yellowing layer is added on the structure, so that the synthetic leather has excellent anti-pollution performance, is easy to clean and does not become yellow when being irradiated by sunlight; the water-based lustring layer adopts the water-based skin feel treating agent and is matched with the curing agent for use, and after the water-based lustring layer is coated on the surface of leather, the light feel is natural and soft, and the hand feel is extremely smooth.
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
In the wet process bass manufacturing process, 41-42 parts of N, N-dimethylformamide, 0.3-0.4 part of penetrating agent, 0.8-0.9 part of emulsifier, 0.1 part of strong hydrophobic surfactant, 0.1-0.3 part of water-based color paste, 10-11 parts of synthetic fiber powder and 45-47 parts of high-elasticity super-soft wet process PU resin are sequentially added into a reaction kettle, and after uniform stirring, the mixture is vacuumized for 50-60min and filtered by a 60-80 mesh net to prepare the wet process coating; manufacturing a wet base: cleaning a high-F matt velvet base fabric with the thickness of 0.7mm in clear water, ironing the base fabric uniformly by using a fabric ironing wheel, ironing the base fabric, ironing partial moisture, uniformly coating the wet coating prepared in the step (1) on the base fabric, penetrating the wet coating into the base fabric through a solution pre-solidification tank with the content of N, N-dimethylformamide of 18%, washing, ironing by 12 rounds, fixing the broad width, drying, and cooling by using a circulating cooling wheel to prepare the wet base fabric.
The penetrant in the wet bass layer is a compound of anionic surfactants, has rapid and uniform permeability, can accelerate the solidification speed, enlarge foam pores, improve the myogenesis and reduce the production cost; the emulsifier is a negative nonionic surfactant, can effectively slow down the rapid solidification of the surface in the wet PU solidification process, adjusts the cell structure, enables cells to be fine and uniform, enhances the betes thick feeling, is a strong hydrophobic surfactant, can slow down the rapid solidification of the surface in the wet solidification process, delays the overall solidification speed, gives betes dense multiple pores, is a PU resin for high-elasticity super-soft embossed clothes, has the viscosity of 18-30 ten thousand CPS/25 ℃, the 100% modulus of 2.0-3.0MPa and the elongation of more than 600 percent, has the characteristics of high myogenesis, strong meat feeling, high elasticity, super softness and the like, and the prepared wet betes have the super-soft characteristic.
Example 2
In the dry-process polyurethane layer preparation: firstly, preparing dry-process polyurethane coating, and diluting yellowing-resistant resin with a solvent according to a proportion. Weighing 6-7g of yellowing-resistant toner, adding the yellowing-resistant toner into 100 parts of diluted resin, stirring for 5-10min, and uniformly dissolving the toner into the resin by a stirrer to prepare the dry-process polyurethane coating; coating the dry-process polyurethane coating on release paper through a precise coating platform, wherein the coating thickness is 0.15mm, and drying in an oven at the temperature of 110-; coating a layer of dry polyurethane coating on the dried coating, wherein the coating thickness is 0.15mm, and drying in an oven at the temperature of 110-; placing the wet base in an oven at the temperature of 110-; and (3) attaching the coating layer dried in the step (3) to the softened wet base through a high-pressure roller, drying the coating layer through an oven at the temperature of 120-150 ℃, and stripping release paper and veneering leather to obtain a dry polyurethane layer.
The yellowing-resistant resin is non-yellowing aliphatic solvent-resistant dry-process surface resin, has the viscosity of 6-12 ten thousand mPa & s, has excellent stain resistance, ensures that a synthetic leather product is easy to clean and does not turn yellow under the irradiation of sunlight, the non-yellowing treatment agent is a non-yellowing extinction surface treatment agent, has the viscosity of 200-800cps, can be directly printed on the surface of leather, ensures that the yellowing resistance of the synthetic leather is enhanced, and has dry and comfortable hand feeling and good transparency.
Example 3
The extinction treatment agent in the extinction treatment layer manufactured in the step (5) is a strong extinction type surface treatment agent, the viscosity is 500-1000cps, the mesh wheel used in the extinction treatment layer is 180-mesh treatment for 20 rounds, preferably, the curing agent in the water-based ironing layer manufactured in the step (6) is a cross-linking agent, the water-based ironing treatment agent is a water-based skin feel treatment agent and is matched with the curing agent, and the mesh wheel in the water-based ironing layer manufacturing is 300-mesh treatment for 10 rounds.
The extinction treating agent is a strong extinction type surface treating agent, the viscosity is 500-1000cps, the surface of the leather can be directly treated, the synthetic leather has good temperature resistance and solvent resistance after treatment, the curing agent in the water-based ironing layer is also called a cross-linking agent, the cross-linking agent generates a diradical after exposure, the diradical interacts with the hydrocarbon resin to form a bridge bond between polymer molecular chains and becomes an insoluble substance with a three-dimensional structure, the water-based ironing treating agent in the water-based ironing layer is a water-based skin feel treating agent and is matched with the curing agent for use, after the surface of the leather is coated, the light feel is natural and soft, and the hand feeling is extremely smooth.
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 (9)
1. A preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather is characterized by comprising the following steps: the method comprises the following steps:
preparing a wet coating: adding 41-42 parts of N, N-dimethylformamide, 0.3-0.4 part of penetrating agent, 0.8-0.9 part of emulsifying agent, 0.1 part of strong hydrophobic surfactant, 0.1-0.3 part of water-based color paste, 10-11 parts of synthetic fiber powder and 45-47 parts of high-elasticity super-soft wet PU resin into a reaction kettle in sequence, uniformly stirring, vacuumizing for 50-60min, and filtering by using a 60-80 mesh net to prepare the wet coating;
manufacturing a wet method base layer: cleaning a high-F matt velvet base fabric with the thickness of 0.7mm in clear water, ironing the base fabric uniformly by using a fabric ironing wheel, ironing the base fabric, ironing partial water, uniformly coating the wet coating prepared in the step (1) on the base fabric, penetrating the wet coating into the base fabric through an N-N-dimethylformamide solution pre-coagulation tank with the content of 18%, washing, ironing by 12 rounds, fixing the broad width, drying, and cooling by using a circulating cooling wheel to prepare wet base fabric;
(2) preparing a dry-process polyurethane layer: preparing a dry polyurethane coating: diluting the yellowing-resistant resin with a solvent according to a ratio; weighing 6-7g of yellowing-resistant toner, adding the yellowing-resistant toner into 100 parts of diluted resin, stirring for 5-10min, and uniformly dissolving the toner into the resin by a stirrer to prepare the dry-process polyurethane coating;
coating the dry-process polyurethane coating on release paper through a precise coating platform, wherein the coating thickness is 0.15mm, and drying in an oven at the temperature of 110-;
coating a layer of dry polyurethane coating on the dried coating, wherein the coating thickness is 0.15mm, and drying in an oven at the temperature of 110-;
placing the wet base in an oven at the temperature of 110-;
the coating layer dried in the step (3) is attached to the softened wet base through a high-pressure roller, and is dried through an oven at the temperature of 120-150 ℃, and the release paper and the veneering leather are peeled off to prepare a dry polyurethane layer;
(3) preparing a yellowing-resistant treatment layer: treating the yellowing-resistant extinction treatment agent on the dry-process polyurethane layer through a mesh wheel, and drying the dry-process polyurethane layer through a drying oven at the temperature of 120-150 ℃ to prepare a yellowing-resistant treatment layer;
(4) manufacturing the absorption line layer: heating the flower suction machine to 170-180 ℃, preheating the leather, quickly spreading the front side of the preheated leather on the grain road surface of the flower suction plate, tightly adhering for 30-40s, and removing the leather to obtain a grain suction layer;
(5) preparation of the matting layer: treating the extinction treatment agent on the absorption line layer through a mesh wheel, and drying the absorption line layer through a drying oven at the temperature of 120-;
(6) preparing a water-based luster finishing layer: adding 2 parts of curing agent into 100 parts of aqueous ironing treatment agent, uniformly stirring at a high speed by a stirrer to prepare a mixture A, treating the mixture A on an extinction treatment layer through a mesh wheel, and drying through a drying oven at 150 ℃ under 130-.
2. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the penetrant in the wet coating prepared in the step (1) is a complex of anionic surfactants, the emulsifier is a negative nonionic surfactant, and the PU resin is high-elasticity and super-soft PU resin for embossed clothes.
3. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the raw materials in the wet coating prepared in the step (1) are added while stirring, and the stirring speed is 35-45 r/min.
4. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the temperature of the cloth ironing wheel in the wet method Bass layer manufactured in the step (1) is 85 ℃, the temperature of the pre-coagulation tank is 30 ℃, the temperature of the 12-wheel ironing is 140 ℃, the fixed width is 1.35m, and the temperature during drying is 150 ℃.
5. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the yellowing-resistant resin in the dry-method polyurethane layer prepared in the step (2) is non-yellowing aliphatic solvent-resistant dry-method surface layer resin, the viscosity is 6-12 ten thousand mPa.s, the dilution ratio of the yellowing-resistant resin to the solvent is 90 parts of yellowing-resistant resin, 70 parts of acetone solution and 20 parts of dimethylformamide solution are uniformly mixed, the rotating speed of a stirrer is 4000-8000r/min, the non-yellowing treatment agent is a non-yellowing extinction surface treatment agent, and the viscosity is 200-800 cps.
6. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the mesh wheel in the yellowing-resistant treatment layer prepared in the step (3) is 16 meshes of 220 meshes.
7. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: and (4) when the leather is preheated in the grain absorption layer, the linear speed of the conveying belt is 6-8 m/min.
8. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the extinction treatment agent in the extinction treatment layer manufactured in the step (5) is a strong extinction type surface treatment agent, the viscosity is 500-1000cps, and the mesh wheel used in the extinction treatment layer is 180-mesh treatment for 20 wheels.
9. The preparation method of the ultra-soft anti-yellowing aqueous skin-feel synthetic leather according to claim 1, characterized in that: the curing agent in the step (6) is a cross-linking agent, the water-based lustring treatment agent is a water-based skin feel treatment agent and is matched with the curing agent for use, and the mesh wheel in the step (6) is a 300-mesh treatment wheel for 10 times.
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