CN113622203A - Method for preparing environment-friendly synthetic leather by dry method - Google Patents
Method for preparing environment-friendly synthetic leather by dry method Download PDFInfo
- Publication number
- CN113622203A CN113622203A CN202111097974.2A CN202111097974A CN113622203A CN 113622203 A CN113622203 A CN 113622203A CN 202111097974 A CN202111097974 A CN 202111097974A CN 113622203 A CN113622203 A CN 113622203A
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- China
- Prior art keywords
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- synthetic leather
- steps
- drying
- preparing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 107
- 239000002649 leather substitute Substances 0.000 title claims abstract description 62
- 239000011248 coating agent Substances 0.000 claims abstract description 110
- 238000001035 drying Methods 0.000 claims abstract description 75
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 229920002635 polyurethane Polymers 0.000 claims abstract description 37
- 239000004814 polyurethane Substances 0.000 claims abstract description 37
- 239000000853 adhesive Substances 0.000 claims abstract description 31
- 230000001070 adhesive effect Effects 0.000 claims abstract description 31
- 230000008569 process Effects 0.000 claims abstract description 15
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 158
- 239000004744 fabric Substances 0.000 claims description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 238000005470 impregnation Methods 0.000 claims description 40
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 24
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 24
- -1 polydimethylsiloxane Polymers 0.000 claims description 22
- 239000002002 slurry Substances 0.000 claims description 19
- DWHIUNMOTRUVPG-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-(2-dodecoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCO DWHIUNMOTRUVPG-UHFFFAOYSA-N 0.000 claims description 16
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 16
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 claims description 16
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- 229940031674 laureth-7 Drugs 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 239000001587 sorbitan monostearate Substances 0.000 claims description 16
- 235000011076 sorbitan monostearate Nutrition 0.000 claims description 16
- 229940035048 sorbitan monostearate Drugs 0.000 claims description 16
- 230000015271 coagulation Effects 0.000 claims description 14
- 238000005345 coagulation Methods 0.000 claims description 14
- YZUUTMGDONTGTN-UHFFFAOYSA-N nonaethylene glycol Chemical compound OCCOCCOCCOCCOCCOCCOCCOCCOCCO YZUUTMGDONTGTN-UHFFFAOYSA-N 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 8
- IJCWFDPJFXGQBN-RYNSOKOISA-N [(2R)-2-[(2R,3R,4S)-4-hydroxy-3-octadecanoyloxyoxolan-2-yl]-2-octadecanoyloxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCCCCCCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCCCCCCCCCCCC IJCWFDPJFXGQBN-RYNSOKOISA-N 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 8
- FDATWRLUYRHCJE-UHFFFAOYSA-N diethylamino hydroxybenzoyl hexyl benzoate Chemical compound CCCCCCOC(=O)C1=CC=CC=C1C(=O)C1=CC=C(N(CC)CC)C=C1O FDATWRLUYRHCJE-UHFFFAOYSA-N 0.000 claims description 8
- 229960001630 diethylamino hydroxybenzoyl hexyl benzoate Drugs 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 8
- 239000009719 polyimide resin Substances 0.000 claims description 8
- 229920005749 polyurethane resin Polymers 0.000 claims description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 8
- 229940092258 rosemary extract Drugs 0.000 claims description 8
- 235000020748 rosemary extract Nutrition 0.000 claims description 8
- 239000001233 rosmarinus officinalis l. extract Substances 0.000 claims description 8
- 229910000077 silane Inorganic materials 0.000 claims description 8
- 239000001589 sorbitan tristearate Substances 0.000 claims description 8
- 235000011078 sorbitan tristearate Nutrition 0.000 claims description 8
- 229960004129 sorbitan tristearate Drugs 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- HIQIXEFWDLTDED-UHFFFAOYSA-N 4-hydroxy-1-piperidin-4-ylpyrrolidin-2-one Chemical compound O=C1CC(O)CN1C1CCNCC1 HIQIXEFWDLTDED-UHFFFAOYSA-N 0.000 claims description 7
- 229920002385 Sodium hyaluronate Polymers 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004049 embossing Methods 0.000 claims description 7
- 238000010409 ironing Methods 0.000 claims description 7
- 238000004898 kneading Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000007639 printing Methods 0.000 claims description 7
- 229940010747 sodium hyaluronate Drugs 0.000 claims description 7
- YWIVKILSMZOHHF-QJZPQSOGSA-N sodium;(2s,3s,4s,5r,6r)-6-[(2s,3r,4r,5s,6r)-3-acetamido-2-[(2s,3s,4r,5r,6r)-6-[(2r,3r,4r,5s,6r)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2- Chemical compound [Na+].CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 YWIVKILSMZOHHF-QJZPQSOGSA-N 0.000 claims description 7
- 238000003892 spreading Methods 0.000 claims description 7
- 230000007480 spreading Effects 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 description 25
- 238000003756 stirring Methods 0.000 description 25
- 238000005303 weighing Methods 0.000 description 25
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 21
- 239000010410 layer Substances 0.000 description 21
- 238000012805 post-processing Methods 0.000 description 6
- 229940001468 citrate Drugs 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 229940083542 sodium Drugs 0.000 description 5
- 239000010985 leather Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229940008099 dimethicone Drugs 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- KIUKXJAPPMFGSW-YXBJCWEESA-N (2s,4s,5r,6s)-6-[(2s,3r,5s,6r)-3-acetamido-2-[(3s,4r,5r,6r)-6-[(3r,4r,5s,6r)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid Chemical compound CC(=O)N[C@H]1C(O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H](C(O[C@@H]3[C@@H]([C@@H](O)C(O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)C(C(O)=O)O1 KIUKXJAPPMFGSW-YXBJCWEESA-N 0.000 description 1
- AXISYYRBXTVTFY-UHFFFAOYSA-N Isopropyl tetradecanoate Chemical compound CCCCCCCCCCCCCC(=O)OC(C)C AXISYYRBXTVTFY-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006467 substitution reaction Methods 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
- D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
- D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
-
- 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
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- 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
- D06N3/125—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 polyamides
-
- 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
- D06N3/128—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 silicon polymers
-
- 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
-
- 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
- D06N2209/1664—Releasability
-
- 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
- D06N2209/1678—Resistive to light or to UV
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention relates to a method for preparing environment-friendly synthetic leather by a dry method, which comprises the steps of preparing a wet method bass, dry method veneering, multi-stage drying and post-treatment to obtain the synthetic leather; the dry-process veneering process comprises the steps of uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the coating film to wet-process bass at 95-105 ℃, drying, and separating the release paper to obtain the veneered bass. According to the invention, the coating structure and material of the dry-process veneering are optimized, and the adhesion of the coating is improved in a multi-stage drying manner, so that the aims of improving the light aging resistance and peeling resistance of the synthetic leather are fulfilled.
Description
Technical Field
The invention relates to the technical field of synthetic leather, in particular to a method for preparing environment-friendly synthetic leather by a dry method.
Background
Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute material for natural leather, and is generally manufactured by using a impregnated non-woven fabric as a mesh layer and a microporous polyurethane layer as a particle surface layer. The front and back surfaces of the synthetic leather are very similar to leather, have certain air permeability, are closer to natural leather than common artificial leather, and are widely used for manufacturing shoes, boots, bags, balls and the like.
After long-term use, the synthetic leather mainly has the problems of surface peeling, cracks in a low-temperature environment and the like. The main reason for this is that after long-term exposure to the sun, the ultraviolet rays in the sunlight damage the macromolecules in the intermediate layer through the surface layer of the synthetic leather, so that the fragile parts such as the aging of the macromolecules in the intermediate layer and the periphery of the cells are easily broken under the dynamic mechanical action, and the bonding strength of the intermediate layer is reduced.
At present, the synthetic leather on the market is mainly added with a light resisting agent in a surface layer and a middle layer for blocking ultraviolet rays and preventing damage to a coating. In this way, although the light aging resistant effect of the synthetic leather can be achieved, the light resistant material particles can be concentrated on the cell walls of the middle layer to form stress concentration points under dynamic mechanical behavior, crack initiation sources are formed, the dynamic physical properties of the foaming layer are reduced, perforation is broken, and the peeling property is poor. Therefore, improvement of a preparation method of the environment-friendly synthetic leather is needed, so that the synthetic leather obtained by dry veneering has the effects of light aging resistance and peeling resistance.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for preparing environment-friendly synthetic leather by a dry method, which achieves the aim of improving the light aging resistance and peeling resistance of the synthetic leather.
The above object of the present invention is achieved by the following technical solutions:
a method for preparing environment-friendly synthetic leather by a dry method comprises the steps of preparing a wet method bass, dry method veneering, multi-stage drying and post-processing to obtain the synthetic leather; the dry-process veneering process comprises the steps of uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the coating film to wet-process bass at 95-105 ℃, drying, and separating the release paper to obtain the veneered bass.
By adopting the technical scheme, after dry-process veneering, a coating film formed by a polyurethane adhesive, a light-resistant coating agent and a heat-insulating coating agent is sequentially adhered to the wet-process bass, and then a multi-stage drying mode is adopted, so that the polyurethane adhesive can quickly permeate into tissues of the wet-process bass and the light-resistant coating agent at a lower temperature and cannot be damaged by high temperature, and the deformation of components such as protein in the tissues of the wet-process bass can be accelerated at a higher temperature so as to fix the polyurethane coating agent entering the tissues in the tissues and interweave the tissues with the denatured tissues, and finally the adhesive force of the coating film is improved; after the synthetic leather is prepared, the heat-insulating coating agent on the outer layer can block, reflect and radiate sunlight near infrared heat and block partial ultraviolet rays so as to prevent the coating from aging, meanwhile, the light-resistant coating agent can absorb the residual ultraviolet rays, effective light-resistant particles in the coating agent are uniformly dispersed, and stress concentration points under dynamic mechanical behavior can be effectively prevented from being formed, so that the aim of light-resistant aging is fulfilled, cracks are prevented from being initiated, and the integrity of the coating is protected; in conclusion, the aim of improving the light aging resistance and peeling resistance of the synthetic leather is fulfilled by optimizing the structure and the material of the coating film of the dry veneering and assisting in improving the adhesive force of the coating film in a multi-stage drying mode.
Further, the wet-process bass preparation process comprises the steps of bending and laminating the base fabric into 15-20 layers, pressing to compress the base fabric to 40-60% of the original height, enabling the base fabric to be 0.5-1 kg in pressure, immersing the base fabric into an impregnation tank with impregnation slurry for impregnation, releasing the base fabric at a speed of 1.2-1.4 mm/min in the impregnation process, and continuing to impregnate the base fabric for 2 hours after the base fabric is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; and (3) washing the base cloth solidified by water for a plurality of times by using clean water, squeezing, drying, widening in a fixed width, ironing, cooling and coiling the fabric to obtain the wet-process bass.
Preferably, in the process of preparing the wet-process bass, the thickness of each layer of base cloth is 1.2-1.4 mm, the width is 1.4-1.5 mm, and the length is 12 m.
Preferably, the impregnation slurry is composed of the following raw materials by weight, 100 parts of polyurethane resin; 300-350 parts of DMF; 1.0-1.5 parts of sodium di (laureth-7) citrate; 0.5-1.5 parts of sorbitan monostearate; 0.2-0.5 parts of sorbitan tristearate; 1-15 parts of color paste.
Preferably, the DMF solution consists of raw materials of, by weight, DMF10 parts; and 90 parts of water.
Further, the heat insulation type coating agent is composed of the following raw materials in parts by weight, 100 parts of water-based polyimide resin; 10-25 parts of color paste; 35-40 parts of DMF; 15-20 parts of 2-butanone; 2-4 parts of rosemary extract; 2-4 parts of sodium hyaluronate; 0.5-1.0 part of sodium di (laureth-7) citrate; 1.0-2.0 parts of sorbitan monostearate.
Further, the light-resistant coating agent is composed of the following raw materials in parts by weight, 100 parts of hydrogenated polydimethylsiloxane; 10-25 parts of color paste; 35-40 parts of DMF (N, N-dimethylformamide); 15-20 parts of 2-butanone; 5-10 parts of diethyl amino hydroxybenzoyl hexyl benzoate; 5-10 parts of nano-grade zinc oxide; 5-10 parts of nano-scale titanium dioxide; 1-3 parts of PEG-9 polydimethylsiloxyethyl polydimethylsiloxane.
Further, the polyurethane adhesive is composed of the following raw materials in parts by weight, 100 parts of polyurethane; 4-8 parts of DMF; 20-30 parts of 2-butanone; 6-10 parts of toluene; 12-14 parts of a silane cross-linking agent; 2-4 parts of isopropyl myristate; 2-4 parts of PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; 1-3 parts of polyvinyl alcohol.
Further, the multistage drying process comprises the steps of firstly preserving heat of the veneered bass at 120 ℃ for 4min, then heating to 130 ℃ according to the speed of 1.0-1.5 ℃/min, then preserving heat at 130 ℃ for 6min, then heating to 140 ℃ according to the speed of 1.5-2.0 ℃/min, and finally preserving heat at 140 ℃ for 10 min.
Further, the post-treatment process comprises the steps of printing, embossing and kneading the multi-stage dried base, then washing with clean water, and drying to obtain the synthetic leather.
In conclusion, the beneficial technical effects of the invention are as follows: by optimizing the coating structure and material of the dry-process veneering and assisting in improving the adhesive force of the coating in a multi-stage drying mode, the aims of improving the light aging resistance and peeling resistance of the synthetic leather are fulfilled.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further described in the following with the specific embodiments.
Example 1: the invention discloses a method for preparing environment-friendly synthetic leather by a dry method, which comprises the steps of raw material preparation, wet method bass preparation, dry method veneering, multi-stage drying and post-treatment to obtain the synthetic leather. The dry-process veneering process comprises the steps of uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the coating film to the wet-process bass at 100 ℃, drying, and separating the release paper to obtain the veneering bass.
Example 2: the invention discloses a method for preparing environment-friendly synthetic leather by a dry method, which is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 raw material preparation, impregnation slurry: weighing the following components of polyurethane resin, DMF, sodium di (laureth-7) citrate, sorbitan monostearate, sorbitan tristearate and color paste according to the weight of the components in the table 1; stirring and mixing the components uniformly, and adjusting the viscosity to 40cps to obtain impregnation slurry;
DMF solution: weighing 10 parts of DMF (dimethyl formamide); 90 parts of water; stirring and mixing the components uniformly to obtain a DMF solution;
heat-insulating coating agent: weighing the following components of waterborne polyimide resin, color paste, DMF (dimethyl formamide), 2-butanone, rosemary extract, sodium hyaluronate, sodium di (laureth-7) citrate and sorbitan monostearate according to the weight in the following table 2; stirring and mixing the components uniformly to obtain a heat-insulating coating agent;
light-resistant coating agent: weighing the following components, namely hydrogenated polydimethylsiloxane, color paste, DMF (dimethyl formamide), 2-butanone, diethyl amino hydroxybenzoyl hexyl benzoate, nano zinc oxide, nano titanium dioxide and PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; stirring and mixing the components uniformly to obtain a light-resistant coating agent;
polyurethane adhesive: weighing the following components of polyurethane, DMF, 2-butanone, toluene, a silane cross-linking agent, isopropyl myristate, PEG-9 polydimethylsiloxyethyl polydimethylsiloxane and polyvinyl alcohol according to the weight shown in the table 4; uniformly stirring and mixing the components to obtain a polyurethane adhesive;
s2, preparing a wet method bass, cutting a synthetic leather blank into base cloth with the thickness of 1.2mm and the width of 1.5mm, bending and laminating the base cloth into 18 layers, pressing to compress the base cloth to 50% of the original height, wherein the length of each layer is 12m, the pressure is 0.5kg, immersing the base cloth into an impregnation tank with impregnation slurry for impregnation, releasing the base cloth at the speed of 1.3mm/min in the impregnation process, and continuing to impregnate for 2 hours after the base cloth is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; washing the base cloth solidified by water for a plurality of times by using clean water until no floating color appears in the clean water, squeezing, drying, fixing the width, widening, ironing, cooling and coiling the fabric to obtain a wet-process bass;
s3 dry-process veneering, namely uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the polyurethane adhesive to wet-process bass at 100 ℃, drying, and separating the release paper to obtain veneering bass;
s4, multi-stage drying, namely, performing multi-stage drying treatment on the veneering bass, and heating to 140 ℃ from 120 ℃ in stages so as to fix the color of the base cloth and dry the base cloth; specifically, the temperature is preserved for 4min at 120 ℃, then is raised to 130 ℃ according to the speed of 1.3 ℃/min, then is preserved for 6min at 130 ℃, then is raised to 140 ℃ according to the speed of 2.0 ℃/min, and finally is preserved for 10min at 140 ℃;
s5, post-processing, namely printing, embossing and kneading the multi-stage dried bass, then washing in clear water, and drying to obtain synthetic leather; after cleaning, the pH value of the finished synthetic leather is 15 +/-0.5, and the content of DMF is less than 10 ppm.
Example 3: the invention discloses a method for preparing environment-friendly synthetic leather by a dry method, which is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 raw material preparation, impregnation slurry: weighing the following components of polyurethane resin, DMF, sodium di (laureth-7) citrate, sorbitan monostearate, sorbitan tristearate and color paste according to the weight of the components in the table 1; stirring and mixing the components uniformly, and adjusting the viscosity to 50cps to obtain impregnation slurry;
DMF solution: weighing 10 parts of DMF (dimethyl formamide); 90 parts of water; stirring and mixing the components uniformly to obtain a DMF solution;
heat-insulating coating agent: weighing the following components of waterborne polyimide resin, color paste, DMF (dimethyl formamide), 2-butanone, rosemary extract, sodium hyaluronate, sodium di (laureth-7) citrate and sorbitan monostearate according to the weight in the following table 2; stirring and mixing the components uniformly to obtain a heat-insulating coating agent;
light-resistant coating agent: weighing the following components, namely hydrogenated polydimethylsiloxane, color paste, DMF (dimethyl formamide), 2-butanone, diethyl amino hydroxybenzoyl hexyl benzoate, nano zinc oxide, nano titanium dioxide and PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; stirring and mixing the components uniformly to obtain a light-resistant coating agent;
polyurethane adhesive: weighing the following components of polyurethane, DMF, 2-butanone, toluene, a silane cross-linking agent, isopropyl myristate, PEG-9 polydimethylsiloxyethyl polydimethylsiloxane and polyvinyl alcohol according to the weight shown in the table 4; uniformly stirring and mixing the components to obtain a polyurethane adhesive;
s2, preparing a wet method bass, cutting a synthetic leather blank into base cloth with the thickness of 1.3mm and the width of 1.4mm, bending and laminating the base cloth into 17 layers, pressing to compress the base cloth to 55% of the original height, wherein the length of each layer is 12m, the pressure is 0.7kg, immersing the base cloth into an impregnation tank with impregnation slurry for impregnation, releasing the base cloth at the speed of 1.2mm/min in the impregnation process, and continuing to impregnate for 2 hours after the base cloth is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; washing the base cloth solidified by water for a plurality of times by using clean water until no floating color appears in the clean water, squeezing, drying, fixing the width, widening, ironing, cooling and coiling the fabric to obtain a wet-process bass;
s3 dry-process veneering, namely uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the polyurethane adhesive to wet-process bass at 95 ℃, drying, and separating the release paper to obtain veneering bass;
s4, multi-stage drying, namely, performing multi-stage drying treatment on the veneering bass, and heating to 140 ℃ from 120 ℃ in stages so as to fix the color of the base cloth and dry the base cloth; specifically, the temperature is preserved for 4min at 120 ℃, then is raised to 130 ℃ according to the speed of 1.2 ℃/min, then is preserved for 6min at 130 ℃, then is raised to 140 ℃ according to the speed of 1.5 ℃/min, and finally is preserved for 10min at 140 ℃;
s5, post-processing, namely printing, embossing and kneading the multi-stage dried bass, then washing in clear water, and drying to obtain synthetic leather; after cleaning, the pH value of the finished synthetic leather is 15 +/-0.5, and the content of DMF is less than 10 ppm.
Example 4: the invention discloses a method for preparing environment-friendly synthetic leather by a dry method, which is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 raw material preparation, impregnation slurry: weighing the following components of polyurethane resin, DMF, sodium di (laureth-7) citrate, sorbitan monostearate, sorbitan tristearate and color paste according to the weight of the components in the table 1; stirring and mixing the components uniformly, and adjusting the viscosity to 55cps to obtain impregnation slurry;
DMF solution: weighing 10 parts of DMF (dimethyl formamide); 90 parts of water; stirring and mixing the components uniformly to obtain a DMF solution;
heat-insulating coating agent: weighing the following components of waterborne polyimide resin, color paste, DMF (dimethyl formamide), 2-butanone, rosemary extract, sodium hyaluronate, sodium di (laureth-7) citrate and sorbitan monostearate according to the weight in the following table 2; stirring and mixing the components uniformly to obtain a heat-insulating coating agent;
light-resistant coating agent: weighing the following components, namely hydrogenated polydimethylsiloxane, color paste, DMF (dimethyl formamide), 2-butanone, diethyl amino hydroxybenzoyl hexyl benzoate, nano zinc oxide, nano titanium dioxide and PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; stirring and mixing the components uniformly to obtain a light-resistant coating agent;
polyurethane adhesive: weighing the following components of polyurethane, DMF, 2-butanone, toluene, a silane cross-linking agent, isopropyl myristate, PEG-9 polydimethylsiloxyethyl polydimethylsiloxane and polyvinyl alcohol according to the weight shown in the table 4; uniformly stirring and mixing the components to obtain a polyurethane adhesive;
s2, preparing a wet method bass, cutting a synthetic leather blank into base cloth with the thickness of 1.4mm and the width of 1.5mm, bending and laminating the base cloth into 15 layers, pressing to compress the base cloth to 45% of the original height, wherein the length of each layer is 12m, the pressure is 0.8kg, immersing the base cloth into an impregnation tank with impregnation slurry for impregnation, releasing the base cloth at the speed of 1.4mm/min in the impregnation process, and continuing to impregnate for 2 hours after the base cloth is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; washing the base cloth solidified by water for a plurality of times by using clean water until no floating color appears in the clean water, squeezing, drying, fixing the width, widening, ironing, cooling and coiling the fabric to obtain a wet-process bass;
s3 dry-process veneering, namely uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the polyurethane adhesive to wet-process bass at 105 ℃, drying, and separating the release paper to obtain veneering bass;
s4, multi-stage drying, namely, performing multi-stage drying treatment on the veneering bass, and heating to 140 ℃ from 120 ℃ in stages so as to fix the color of the base cloth and dry the base cloth; specifically, the temperature is preserved for 4min at 120 ℃, then is raised to 130 ℃ according to the speed of 1.0 ℃/min, then is preserved for 6min at 130 ℃, then is raised to 140 ℃ according to the speed of 1.7 ℃/min, and finally is preserved for 10min at 140 ℃;
s5, post-processing, namely printing, embossing and kneading the multi-stage dried bass, then washing in clear water, and drying to obtain synthetic leather; after cleaning, the pH value of the finished synthetic leather is 15 +/-0.5, and the content of DMF is less than 10 ppm.
Example 5: the invention discloses a method for preparing environment-friendly synthetic leather by a dry method, which is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 raw material preparation, impregnation slurry: weighing the following components of polyurethane resin, DMF, sodium di (laureth-7) citrate, sorbitan monostearate, sorbitan tristearate and color paste according to the weight of the components in the table 1; stirring and mixing the components uniformly, and adjusting the viscosity to 45cps to obtain impregnation slurry;
DMF solution: weighing 10 parts of DMF (dimethyl formamide); 90 parts of water; stirring and mixing the components uniformly to obtain a DMF solution;
heat-insulating coating agent: weighing the following components of waterborne polyimide resin, color paste, DMF (dimethyl formamide), 2-butanone, rosemary extract, sodium hyaluronate, sodium di (laureth-7) citrate and sorbitan monostearate according to the weight in the following table 2; stirring and mixing the components uniformly to obtain a heat-insulating coating agent;
light-resistant coating agent: weighing the following components, namely hydrogenated polydimethylsiloxane, color paste, DMF (dimethyl formamide), 2-butanone, diethyl amino hydroxybenzoyl hexyl benzoate, nano zinc oxide, nano titanium dioxide and PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; stirring and mixing the components uniformly to obtain a light-resistant coating agent;
polyurethane adhesive: weighing the following components of polyurethane, DMF, 2-butanone, toluene, a silane cross-linking agent, isopropyl myristate, PEG-9 polydimethylsiloxyethyl polydimethylsiloxane and polyvinyl alcohol according to the weight shown in the table 4; uniformly stirring and mixing the components to obtain a polyurethane adhesive;
s2, preparing a wet method bass, cutting a synthetic leather blank into base cloth with the thickness of 1.3mm and the width of 1.4mm, bending and laminating the base cloth into 16 layers, pressing to compress the base cloth to 40% of the original height, wherein the length of each layer is 12m, the pressure is 1.0kg, immersing the base cloth into an impregnation tank with impregnation slurry for impregnation, releasing the base cloth at the speed of 1.2mm/min in the impregnation process, and continuing to impregnate for 2 hours after the base cloth is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; washing the base cloth solidified by water for a plurality of times by using clean water until no floating color appears in the clean water, squeezing, drying, fixing the width, widening, ironing, cooling and coiling the fabric to obtain a wet-process bass;
s3 dry-process veneering, namely uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the polyurethane adhesive to wet-process bass at 98 ℃, drying, and separating the release paper to obtain veneering bass;
s4, multi-stage drying, namely, performing multi-stage drying treatment on the veneering bass, and heating to 140 ℃ from 120 ℃ in stages so as to fix the color of the base cloth and dry the base cloth; specifically, the temperature is preserved for 4min at 120 ℃, then is raised to 130 ℃ according to the speed of 1.5 ℃/min, then is preserved for 6min at 130 ℃, then is raised to 140 ℃ according to the speed of 1.8 ℃/min, and finally is preserved for 10min at 140 ℃;
s5, post-processing, namely printing, embossing and kneading the multi-stage dried bass, then washing in clear water, and drying to obtain synthetic leather; after cleaning, the pH value of the finished synthetic leather is 15 +/-0.5, and the content of DMF is less than 10 ppm.
Example 6: the invention discloses a method for preparing environment-friendly synthetic leather by a dry method, which is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 raw material preparation, impregnation slurry: weighing the following components of polyurethane resin, DMF, sodium di (laureth-7) citrate, sorbitan monostearate, sorbitan tristearate and color paste according to the weight of the components in the table 1; stirring and mixing the components uniformly, and adjusting the viscosity to 60cps to obtain impregnation slurry;
DMF solution: weighing 10 parts of DMF (dimethyl formamide); 90 parts of water; stirring and mixing the components uniformly to obtain a DMF solution;
heat-insulating coating agent: weighing the following components of waterborne polyimide resin, color paste, DMF (dimethyl formamide), 2-butanone, rosemary extract, sodium hyaluronate, sodium di (laureth-7) citrate and sorbitan monostearate according to the weight in the following table 2; stirring and mixing the components uniformly to obtain a heat-insulating coating agent;
light-resistant coating agent: weighing the following components, namely hydrogenated polydimethylsiloxane, color paste, DMF (dimethyl formamide), 2-butanone, diethyl amino hydroxybenzoyl hexyl benzoate, nano zinc oxide, nano titanium dioxide and PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; stirring and mixing the components uniformly to obtain a light-resistant coating agent;
polyurethane adhesive: weighing the following components of polyurethane, DMF, 2-butanone, toluene, a silane cross-linking agent, isopropyl myristate, PEG-9 polydimethylsiloxyethyl polydimethylsiloxane and polyvinyl alcohol according to the weight shown in the table 4; uniformly stirring and mixing the components to obtain a polyurethane adhesive;
s2 preparing a wet method bass, cutting a synthetic leather blank into base cloth with the thickness of 1.2mm and the width of 1.5mm, bending and laminating the base cloth into 20 layers, pressing to compress the base cloth to 60% of the original height, wherein the length of each layer is 12m, the pressure is 0.6kg, immersing the base cloth into an impregnation tank with impregnation slurry for impregnation, releasing the base cloth at the speed of 1.3mm/min in the impregnation process, and continuing to impregnate for 2 hours after the base cloth is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; washing the base cloth solidified by water for a plurality of times by using clean water until no floating color appears in the clean water, squeezing, drying, fixing the width, widening, ironing, cooling and coiling the fabric to obtain a wet-process bass;
s3 dry-process veneering, namely uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the polyurethane adhesive to wet-process bass at 102 ℃, drying, and separating the release paper to obtain veneering bass;
s4, multi-stage drying, namely, performing multi-stage drying treatment on the veneering bass, and heating to 140 ℃ from 120 ℃ in stages so as to fix the color of the base cloth and dry the base cloth; specifically, the temperature is preserved for 4min at 120 ℃, then is raised to 130 ℃ according to the speed of 1.1 ℃/min, then is preserved for 6min at 130 ℃, then is raised to 140 ℃ according to the speed of 1.6 ℃/min, and finally is preserved for 10min at 140 ℃;
s5, post-processing, namely printing, embossing and kneading the multi-stage dried bass, then washing in clear water, and drying to obtain synthetic leather; after cleaning, the pH value of the finished synthetic leather is 15 +/-0.5, and the content of DMF is less than 10 ppm.
TABLE 1
| Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Polyurethane resin | 100 | 100 | 100 | 100 | 100 |
| DMF | 300 | 305 | 340 | 325 | 350 |
| Sodium di (laureth-7) citrate | 1.0 | 1.2 | 1.4 | 1.5 | 1.3 |
| Sorbitan monostearate | 1.2 | 1.0 | 1.5 | 0.7 | 0.5 |
| Sorbitan tristearate | 0.3 | 0.4 | 0.5 | 0.2 | 0.3 |
| Color paste | 1.0 | 7 | 5 | 10 | 15 |
TABLE 2
| Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Aqueous polyimide resin | 100 | 100 | 100 | 100 | 100 |
| Color paste | 15 | 22 | 25 | 10 | 18 |
| DMF | 37 | 35 | 40 | 38 | 36 |
| 2-butanone | 15 | 18 | 20 | 17 | 19 |
| Rosemary extract | 3 | 2 | 4 | 2 | 3 |
| Hyaluronic acid sodium salt | 2 | 3 | 4 | 3 | 2 |
| Sodium di (laureth-7) citrate | 0.5 | 0.5 | 0.6 | 0.8 | 1.0 |
| Sorbitan monostearate | 1.0 | 1.5 | 1.3 | 2.0 | 1.7 |
TABLE 3
| Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Hydrogenated polydimethylsiloxane | 100 | 100 | 100 | 100 | 100 |
| Color paste | 15 | 22 | 25 | 10 | 18 |
| DMF (N, N-dimethylformamide) | 37 | 35 | 40 | 38 | 36 |
| 2-butanone | 15 | 18 | 20 | 17 | 19 |
| Diethylamino hydroxybenzoyl hexyl benzoate | 5 | 8 | 10 | 6 | 5 |
| Nano-grade zinc oxide | 6 | 7 | 8 | 5 | 10 |
| Nano-grade titanium dioxide | 10 | 5 | 5 | 8 | 6 |
| PEG-9 Dimethylsiloxyethyl Dimethicone | 2 | 1 | 3 | 2 | 3 |
TABLE 4
| Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Polyurethane | 100 | 100 | 100 | 100 | 100 |
| DMF | 5 | 4 | 8 | 6 | 4 |
| 2-butanone | 22 | 20 | 28 | 30 | 25 |
| Toluene | 7 | 6 | 10 | 8 | 9 |
| Silane crosslinking agent | 13 | 12 | 12 | 14 | 14 |
| Myristic acid isopropyl ester | 3 | 2 | 2 | 4 | 4 |
| PEG-9 Dimethylsiloxyethyl Dimethicone | 3 | 4 | 4 | 2 | 2 |
| Polyvinyl alcohol | 1 | 2 | 3 | 2 | 2 |
Performance test
The following performance tests were performed on the synthetic leather products prepared in examples 2 to 6 of the present invention, respectively, using the commercially available synthetic leather products as comparative examples, and the results are shown in table 5.
1. And (3) low-temperature folding resistance measurement: the test is carried out according to the regulation of GB/T8949-2008;
2. measurement of peeling resistance: the test is carried out according to the regulation of GB/T8949-2008;
3. and (3) measuring light resistance: checking with reference to the provisions of QB/T2727-2005;
4. and (3) hand feeling test: the hand contacts with the synthetic leather product, and softness and resilience of each product are compared through the hand contact.
TABLE 5
As can be seen from Table 5, the coating structure and material of the dry-process veneering are optimized, the adhesion force of the coating is improved in a multi-stage drying mode, and the synthetic leather prepared by the method is soft and good in rebound resilience, and also has good low-temperature folding resistance, peeling resistance and light resistance.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. A method for preparing environment-friendly synthetic leather by a dry method is characterized by comprising the following steps: the method comprises the steps of preparing a wet method bass, dry method veneering, multi-stage drying and post-treatment to obtain the synthetic leather; the dry-process veneering process comprises the steps of uniformly coating a heat-insulating coating agent on the surface of release paper by a blade coating method, drying, uniformly coating a light-resistant coating agent on a coating film, drying, uniformly coating a polyurethane adhesive on the coating film, adhering the coating film to wet-process bass at 95-105 ℃, drying, and separating the release paper to obtain the veneered bass.
2. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 1, which is characterized by comprising the following steps of: the wet-process bass preparation method comprises the steps of bending and laminating 15-20 layers of base cloth, applying pressure to compress the base cloth to 40-60% of the original height, enabling the base cloth to be 0.5-1 kg in pressure, immersing the base cloth into an impregnation tank with impregnation slurry for impregnation, releasing the base cloth at a speed of 1.2-1.4 mm/min in the impregnation process, and continuing to impregnate the base cloth for 2 hours after the base cloth is completely released; then, completely spreading the impregnated base fabric, and entering a coagulation tank with a DMF solution for water coagulation; and (3) washing the base cloth solidified by water for a plurality of times by using clean water, squeezing, drying, widening in a fixed width, ironing, cooling and coiling the fabric to obtain the wet-process bass.
3. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 2, which is characterized by comprising the following steps: in the process of preparing the wet-process bass, the thickness of each layer of base cloth is 1.2-1.4 mm, the width is 1.4-1.5 mm, and the length is 12 m.
4. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 2, which is characterized by comprising the following steps: the impregnation slurry is composed of the following raw materials in parts by weight, 100 parts of polyurethane resin; 300-350 parts of DMF; 1.0-1.5 parts of sodium di (laureth-7) citrate; 0.5-1.5 parts of sorbitan monostearate; 0.2-0.5 parts of sorbitan tristearate; 1-15 parts of color paste.
5. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 2, which is characterized by comprising the following steps: the DMF solution consists of the following raw materials in parts by weight, 10 parts of DMF; and 90 parts of water.
6. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 1, which is characterized by comprising the following steps of: the heat-insulating coating agent is prepared from 100 parts by weight of water-based polyimide resin; 10-25 parts of color paste; 35-40 parts of DMF; 15-20 parts of 2-butanone; 2-4 parts of rosemary extract; 2-4 parts of sodium hyaluronate; 0.5-1.0 part of sodium di (laureth-7) citrate; 1.0-2.0 parts of sorbitan monostearate.
7. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 1, which is characterized by comprising the following steps of: the light-resistant coating agent is prepared from 100 parts by weight of hydrogenated polydimethylsiloxane; 10-25 parts of color paste; 35-40 parts of DMF (N, N-dimethylformamide); 15-20 parts of 2-butanone; 5-10 parts of diethyl amino hydroxybenzoyl hexyl benzoate; 5-10 parts of nano-grade zinc oxide; 5-10 parts of nano-scale titanium dioxide; 1-3 parts of PEG-9 polydimethylsiloxyethyl polydimethylsiloxane.
8. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 1, which is characterized by comprising the following steps of: the polyurethane adhesive consists of the following raw materials in parts by weight, namely 100 parts of polyurethane; 4-8 parts of DMF; 20-30 parts of 2-butanone; 6-10 parts of toluene; 12-14 parts of a silane cross-linking agent; 2-4 parts of isopropyl myristate; 2-4 parts of PEG-9 polydimethylsiloxyethyl polydimethylsiloxane; 1-3 parts of polyvinyl alcohol.
9. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 1, which is characterized by comprising the following steps of: the multistage drying process comprises the steps of firstly preserving heat of the veneered bass at 120 ℃ for 4min, then heating to 130 ℃ according to 1.0-1.5 ℃/min, then preserving heat at 130 ℃ for 6min, then heating to 140 ℃ according to 1.5-2.0 ℃/min, and finally preserving heat at 140 ℃ for 10 min.
10. The method for preparing the environment-friendly synthetic leather by the dry method according to claim 1, which is characterized by comprising the following steps of: and the post-treatment process comprises the steps of printing, embossing and kneading the multi-stage dried base, then adding clear water for cleaning, and drying to obtain the synthetic leather.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108978241A (en) * | 2018-08-20 | 2018-12-11 | 福建华夏合成革有限公司 | A kind of metal silk protein ultra-soft leather |
| CN109098008A (en) * | 2018-08-20 | 2018-12-28 | 福建华夏合成革有限公司 | A kind of suede nap ultra-soft albumen leather |
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978241A (en) * | 2018-08-20 | 2018-12-11 | 福建华夏合成革有限公司 | A kind of metal silk protein ultra-soft leather |
| CN109098008A (en) * | 2018-08-20 | 2018-12-28 | 福建华夏合成革有限公司 | A kind of suede nap ultra-soft albumen leather |
| 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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