CN115162013A - Biodegradable TPU synthetic leather and preparation method thereof - Google Patents
Biodegradable TPU synthetic leather and preparation method thereof Download PDFInfo
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- CN115162013A CN115162013A CN202210662329.9A CN202210662329A CN115162013A CN 115162013 A CN115162013 A CN 115162013A CN 202210662329 A CN202210662329 A CN 202210662329A CN 115162013 A CN115162013 A CN 115162013A
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- synthetic leather
- tpu
- biodegradable
- polypropylene carbonate
- coating
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- -1 polypropylene carbonate Polymers 0.000 claims abstract description 22
- 229920000379 polypropylene carbonate Polymers 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 12
- 239000004626 polylactic acid Substances 0.000 claims abstract description 12
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims description 43
- 239000011248 coating agent Substances 0.000 claims description 40
- 238000010521 absorption reaction Methods 0.000 claims description 26
- 238000005266 casting Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000011265 semifinished product Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- VMNKHSPZIGIPLL-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] dihydrogen phosphite Chemical compound OCC(CO)(CO)COP(O)O VMNKHSPZIGIPLL-UHFFFAOYSA-N 0.000 claims description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 4
- 239000004753 textile Substances 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 abstract description 63
- 229920002803 thermoplastic polyurethane Polymers 0.000 abstract description 63
- 239000000463 material Substances 0.000 abstract description 10
- 238000006065 biodegradation reaction Methods 0.000 abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 229920001971 elastomer Polymers 0.000 abstract description 3
- 239000000806 elastomer Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 229920005586 poly(adipic acid) Polymers 0.000 abstract description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 description 12
- 229920002635 polyurethane Polymers 0.000 description 11
- 239000004814 polyurethane Substances 0.000 description 11
- 238000013461 design Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 125000001931 aliphatic group Chemical group 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 238000003490 calendering Methods 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004630 mental health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0036—Polyester fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—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
- D06N3/0088—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 directly applying the resin
-
- 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
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention belongs to the technical field of synthetic leather, and particularly relates to biodegradable TPU synthetic leather and a preparation method thereof. The invention utilizes biodegradable polypropylene carbonate-based thermoplastic polyurethane elastomer, polylactic acid and poly adipic acid/butylene terephthalate-based non-woven fabrics as the surface layer and the base material respectively to manufacture the synthetic leather, thereby realizing the integral biodegradation and ecological sustainability of the synthetic leather; meanwhile, the preparation of the polypropylene carbonate is derived from industrial waste gas carbon dioxide, the preparation of the synthetic leather realizes the reutilization of waste resources, reduces the carbon emission, is natural and natural, and realizes the industrial sustainable development from the source.
Description
Technical Field
The invention belongs to the technical field of synthetic leather, and particularly relates to biodegradable TPU synthetic leather and a preparation method thereof.
Background
Polyurethanes are polar polymeric materials containing repeating urethane structures that are formed by polyaddition reactions of polyisocyanates and polyols. The polyurethane resin can be regarded as a block copolymer in which soft and hard segments are alternately connected to each other. The soft segment determines the elongation at break, elasticity, etc. of the resin, while the hard segment determines the strength, heat resistance, etc. of the resin, and generally contains groups such as ester bond, ether bond, urea bond, urethane bond, and aromatic ring in the molecular chain. Because of its special structure, polyurethane has many excellent properties, such as good mechanical properties, adhesion, wide adjustable range of hardness and softness, etc., and has been widely used as a main coating material in synthetic leather manufacture for a long time.
At present, solvent type polyurethane is mostly adopted as a coating material in the production of domestic polyurethane synthetic leather. However, due to the use of a large amount of organic solvents, such as N, N-dimethylformamide, toluene, etc., on the one hand, serious environmental pollution and resource waste are caused; on the other hand, the organic solvent is flammable and explosive, has a strong smell and a high toxicity, seriously harms the physical and mental health of workers, and the residual volatile organic matters in the finished leather reaches more than 1000mg/kg, which threatens the physical and mental health of consumers, so that the requirement of domestic and foreign markets on the ecological environmental protection property of the synthetic leather can not be met gradually. With the continuous development and promotion of synthetic leather cleaning production technology, the coating material for polyurethane synthetic leather begins to develop towards environmental-friendly waterborne polyurethane, solvent-free bi-component polyurethane, thermoplastic polyurethane elastomer (TPU) and the like.
Patent CN 107083690B discloses a high-performance TPU superfine fiber synthetic leather and a clean production method thereof, dipping a superfine fiber synthetic leather base cloth in a dipping tank filled with kneading liquid, and then entering a continuous type kneading machine to obtain a kneaded base cloth; a calendering production line is adopted, the calendered materials are put into a high-speed kneading machine to be stirred, and then the materials are banburied, plasticated and calendered and then are attached to release paper to obtain a release paper composite TPU film; and (3) adopting a synthetic leather dry production line provided with PUR (polyurethane) blade coating equipment, coating the PUR on a release paper composite TPU film by blade coating, then attaching the release paper to the kneaded base cloth, and stripping the release paper. The invention adopts a kneading technology to greatly improve the flexibility, air permeability and water vapor permeability of the base fabric of the superfine fiber synthetic leather, and then adopts a release paper transfer coating and reactive polyurethane hot melt adhesive blade coating composite technology to compound the thermoplastic polyurethane calendered film on the base fabric of the superfine fiber synthetic leather, thereby obtaining the TPU superfine fiber synthetic leather with soft hand feeling and good mechanical property and service performance.
The above patent does not have biodegradability, and the synthetic leather manufacturing process is loaded down with trivial details moreover, adopts the transfer coating method to make TPU synthetic leather, consumes from type paper.
Disclosure of Invention
The invention provides a preparation method of biodegradable TPU synthetic leather, which comprises the following steps:
s1: mixing the polypropylene carbonate-based TPU, the toner and the antioxidant, and banburying to obtain a TPU molten coating;
s2: coating the TPU molten coating on the surface of a textile substrate to obtain a TPU synthetic leather semi-finished product;
s3: and (3) carrying out line absorption treatment on the surface of the TPU synthetic leather semi-finished product, and cooling to obtain the biodegradable TPU synthetic leather.
Preferably, the mass ratio of the toner to the polypropylene carbonate-based TPU is 3-6:100.
preferably, the mass ratio of the antioxidant to the polypropylene carbonate-based TPU is 0.1-0.2:100.
preferably, in the step S1, a single-screw casting machine is adopted for mixing, the feeding temperature is 90-110 ℃, and the melting temperature is 130-150 ℃.
Preferably, in the step S2, the coating method is a casting method, and the die temperature is 170 to 200 ℃.
Preferably, in the step S2, the thickness of the coating is 0.8 to 1.2mm.
Preferably, in the step S3, the temperature of the texture adsorption treatment is 80-100 ℃ and the time is 8-15S.
Preferably, the content of the polypropylene carbonate in the polypropylene carbonate-based TPU is 40 to 60wt%.
Preferably, the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite and/or pentaerythritol phosphite.
Preferably, the textile substrate is a polylactic acid non-woven fabric or a polybutylene adipate/terephthalate non-woven fabric.
The invention also provides the biodegradable TPU synthetic leather prepared by the preparation method.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) The invention utilizes biodegradable polypropylene carbonate-based thermoplastic polyurethane elastomer, polylactic acid (PLA) and poly adipic acid/butylene terephthalate (PBAT) based non-woven fabrics as the surface layer and the base material respectively to manufacture the synthetic leather, thereby realizing the integral biodegradation and ecological sustainability of the synthetic leather; meanwhile, the preparation of the polypropylene carbonate is derived from industrial waste gas carbon dioxide, the preparation of the synthetic leather realizes the reutilization of waste resources, reduces the carbon emission, is natural and natural, and realizes the industrial sustainable development from the source.
(2) The invention adopts the direct coating process, effectively shortens the manufacturing flow of the synthetic leather, improves the production efficiency and greatly saves the release paper resource.
(3) The synthetic leather manufactured by the invention does not need any organic solvent in the whole process, and the final product meets the requirements of green and environmental protection.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1
A manufacturing method of biodegradable TPU synthetic leather comprises the following steps:
(1) The preparation method comprises the steps of putting 100 parts by weight of aliphatic TPU with the content of polypropylene carbonate of 40wt%, 3.0 parts by weight of toner and 0.1 part by weight of pentaerythritol phosphite into a single-screw casting machine, controlling the temperature of a charging section charging barrel to be 90 ℃ and the temperature of a melting section charging barrel to be 130 ℃, banburying, mixing, then directly coating the TPU on the surface of PLA non-woven fabric by casting equipment, controlling the temperature of a casting die head to be 170 ℃, and controlling the thickness of a coating film to be 0.8mm, and cooling to obtain a TPU synthetic leather semi-finished product.
(2) Coating line absorption and surface treatment: and (3) carrying out grain absorption treatment on the surface of the coating through a vacuum grain absorption machine, enriching the design and color variety of the synthetic leather, carrying out grain absorption temperature of 80 ℃ for 8s, cooling, and carrying out surface treatment to obtain a biodegradable TPU synthetic leather finished product.
The biodegradable TPU synthetic leather manufactured by the technology has excellent biodegradability, the biodegradation degree reaches 92% in 21 days, and the biodegradable TPU synthetic leather has good hydrolysis resistance, wear resistance and flame retardance.
Example 2
A manufacturing method of biodegradable TPU synthetic leather comprises the following steps:
(1) The preparation method comprises the steps of putting 100 parts by weight of aliphatic TPU with the polypropylene carbonate content of 50wt%, 5.0 parts by weight of toner and 0.1 part by weight of pentaerythritol phosphite into a single-screw casting machine, controlling the temperature of a charging barrel at a feeding section to be 100 ℃ and the temperature of a charging barrel at a melting section to be 140 ℃, banburying and mixing, directly coating the TPU on the surface of PLA non-woven fabric by casting equipment, controlling the temperature of a casting die head to be 180 ℃, and controlling the thickness of a coating film to be 1.0mm, and cooling to obtain a TPU synthetic leather semi-finished product.
(2) Coating line absorption and surface treatment: and (3) carrying out grain absorption treatment on the surface of the coating by using a vacuum grain absorption machine, enriching the design and color variety of the synthetic leather, carrying out grain absorption temperature of 90 ℃ for 10s, cooling, and carrying out surface treatment to obtain a biodegradable TPU synthetic leather finished product.
The biodegradable TPU synthetic leather manufactured by the technology has excellent biodegradability, the biodegradation degree reaches 96% in 21 days, and the biodegradable TPU synthetic leather has good hydrolysis resistance, wear resistance and flame retardance.
Example 3
A manufacturing method of biodegradable TPU synthetic leather comprises the following steps:
(1) The preparation method comprises the following steps of putting 100 parts by weight of aromatic TPU with the content of 60wt% of polypropylene carbonate, 6.0 parts by weight of toner and 0.2 part by weight of tri (2, 4-di-tert-butylphenyl) phosphite into a single-screw casting machine, controlling the temperature of a charging barrel at a feeding section to be 110 ℃ and the temperature of a charging barrel at a melting section to be 150 ℃, carrying out banburying and mixing, directly coating the TPU on the surface of PBAT non-woven fabric by casting equipment, controlling the temperature of a casting die head to be 200 ℃, controlling the thickness of a coating film to be 1.2mm, and cooling to obtain a TPU synthetic leather semi-finished product.
(2) Coating line absorption and surface treatment: and (3) carrying out grain absorption treatment on the surface of the coating by using a vacuum grain absorption machine, enriching the design and color variety of the synthetic leather, carrying out grain absorption temperature of 100 ℃ for 15s, cooling, and carrying out surface treatment to obtain a biodegradable TPU synthetic leather finished product.
The biodegradable TPU synthetic leather manufactured by the technology has excellent biodegradability, the biodegradation degree reaches 98 percent in 21 days, and the biodegradable TPU synthetic leather has good hydrolysis resistance, wear resistance and flame retardance.
Example 4
A manufacturing method of biodegradable TPU synthetic leather comprises the following steps:
(1) The preparation method comprises the following steps of putting 100 parts by weight of aliphatic TPU (thermoplastic polyurethane) with the content of polypropylene carbonate of 55wt%, 3.0 parts by weight of toner and 0.2 part by weight of pentaerythritol phosphite into a single-screw casting machine, controlling the temperature of a feeding section material cylinder to be 90 ℃ and the temperature of a melting section material cylinder to be 150 ℃, carrying out banburying and mixing, then directly coating the TPU on the surface of PLA (polylactic acid) non-woven fabric by casting equipment, controlling the temperature of a casting die head to be 190 ℃, and controlling the thickness of a coating film to be 0.8mm, and cooling to obtain a TPU synthetic leather semi-finished product.
(2) Coating line absorption and surface treatment: and (3) carrying out grain absorption treatment on the surface of the coating by using a vacuum grain absorption machine, enriching the design and color variety of the synthetic leather, carrying out grain absorption temperature of 95 ℃ for 12s, cooling, and carrying out surface treatment to obtain a biodegradable TPU synthetic leather finished product.
Example 5
A manufacturing method of biodegradable TPU synthetic leather comprises the following steps:
(1) The preparation method comprises the following steps of putting 100 parts by weight of aliphatic TPU (thermoplastic polyurethane) containing 49wt% of polypropylene carbonate, 5.0 parts by weight of toner and 0.1 part by weight of pentaerythritol phosphite into a single-screw casting machine, controlling the temperature of a charging barrel at a feeding section to be 95 ℃ and the temperature of a charging barrel at a melting section to be 135 ℃, banburying and mixing, directly coating the TPU on the surface of PLA (polylactic acid) non-woven fabric by casting equipment, controlling the temperature of a casting die head to be 180 ℃, and controlling the thickness of a coating film to be 1.0mm, and cooling to obtain a TPU synthetic leather semi-finished product.
(2) Coating line absorption and surface treatment: and (3) carrying out grain absorption treatment on the surface of the coating through a vacuum grain absorption machine, enriching the design and color variety of the synthetic leather, carrying out grain absorption temperature of 90 ℃ for 10s, cooling, and carrying out surface treatment to obtain a biodegradable TPU synthetic leather finished product.
Example 6
A manufacturing method of biodegradable TPU synthetic leather comprises the following steps:
(1) The preparation method comprises the following steps of putting 100 parts by weight of aliphatic TPU (thermoplastic polyurethane) with the content of polypropylene carbonate being 44wt%, 6.0 parts by weight of toner and 0.2 part by weight of pentaerythritol phosphite into a single-screw casting machine, controlling the temperature of a charging barrel at a feeding section to be 100 ℃ and the temperature of a charging barrel at a melting section to be 130 ℃, carrying out banburying and mixing, then directly coating the TPU on the surface of PLA (polylactic acid) non-woven fabric by casting equipment, controlling the temperature of a casting die head to be 200 ℃, and controlling the thickness of a coating film to be 1.0mm, and cooling to obtain a TPU synthetic leather semi-finished product.
(2) Coating line absorption and surface treatment: and (3) carrying out grain absorption treatment on the surface of the coating through a vacuum grain absorption machine, enriching the design and color variety of the synthetic leather, carrying out grain absorption temperature of 90 ℃ for 10s, cooling, and carrying out surface treatment to obtain a biodegradable TPU synthetic leather finished product.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A preparation method of biodegradable TPU synthetic leather is characterized by comprising the following steps:
s1: mixing the polypropylene carbonate-based TPU, the toner and the antioxidant, and banburying to obtain a TPU molten coating;
s2: coating the TPU molten coating on the surface of a textile substrate to obtain a TPU synthetic leather semi-finished product;
s3: and (3) carrying out line absorption treatment on the surface of the TPU synthetic leather semi-finished product, and cooling to obtain the biodegradable TPU synthetic leather.
2. The production method according to claim 1, wherein the mass ratio of the toner to the polypropylene carbonate based TPU is 3 to 6:100.
3. the method according to claim 1, wherein the ratio of the antioxidant to the polypropylene carbonate-based TPU is from 0.1 to 0.2:100.
4. the method of claim 1, wherein the mixing in step S1 is performed by using a single screw casting machine, and the feeding temperature is 90 to 110 ℃ and the melting temperature is 130 to 150 ℃.
5. The method of claim 1, wherein the coating thickness in step S2 is 0.8 to 1.2mm.
6. The method according to claim 1, wherein in the step S3, the temperature of the blotting treatment is 80 to 100 ℃ and the time is 8 to 15 seconds.
7. The method of claim 1, wherein the content of the polypropylene carbonate in the polypropylene carbonate based TPU is 40 to 60wt%.
8. The method according to claim 1, wherein the antioxidant is tris (2, 4-di-t-butylphenyl) phosphite and/or pentaerythritol phosphite.
9. The method of claim 1, wherein the textile substrate is a polylactic acid nonwoven fabric or a polybutylene adipate/terephthalate nonwoven fabric.
10. A biodegradable TPU synthetic leather prepared by the method of any one of claims 1-9.
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| CN105908518A (en) * | 2016-05-30 | 2016-08-31 | 苏州瑞高新材料有限公司 | Method of preparing environment-friendly high-strength TPU synthetic leather |
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