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Manufacturing method of unidirectional solvent-free polyurethane resin artificial leather

A solvent-free polyurethane and artificial leather technology, which is applied in textiles and papermaking, can solve the problems of unfavorable human health and the environment, complicated artificial leather methods, and uneconomical benefits, and achieves the goal of being suitable for large-scale promotion, enhancing mechanical properties, and manufacturing The effect of simplicity

Pending Publication Date: 2020-08-18
TIANSHOU FUJIAN SUPERFIBER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the method of manufacturing artificial leather in the prior art is quite complicated and time-consuming, and is not economical, and the organic solvents involved in the manufacturing process and the organic solvents left in the final product are not conducive to human health and the environment. Meets today's requirements for green chemical processes and materials

Method used

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  • Manufacturing method of unidirectional solvent-free polyurethane resin artificial leather
  • Manufacturing method of unidirectional solvent-free polyurethane resin artificial leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix unidirectional solvent-free polyurethane resin and leveling agent, heat to a molten state to obtain slurry; coat the slurry prepared in step S1 on the release layer, dry and solidify, and obtain a surface coated with a solvent-free polyurethane layer layer, the substrate layer is rolled and bonded to the surface layer coated with a solvent-free polyurethane layer, and then dried and cured to obtain artificial leather; wherein, the unidirectional solvent-free polyurethane resin consists of the following raw materials in parts by weight Prepared: 25 parts of polyether polyol with a functionality of 4 and a number average molecular weight of 4000, 4,4-dicyclohexane diisocyanate and 1,4-cyclohexane diisocyanate at a mass ratio of 3:1 65 parts of mixture, 5 parts of modified nanocrystalline cellulose, 5 parts of N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, the preparation method is: polyether polyol , a mixture of 4,4-dicyclohexane diisocyanate and 1,4-cyclohexan...

Embodiment 2

[0028] Mix unidirectional solvent-free polyurethane resin and leveling agent, heat to a molten state to obtain slurry; coat the slurry prepared in step S1 on the release layer, dry and solidify, and obtain a surface coated with a solvent-free polyurethane layer layer, the substrate layer is rolled and bonded to the surface layer coated with a solvent-free polyurethane layer, and then dried and cured to obtain artificial leather; wherein, the unidirectional solvent-free polyurethane resin consists of the following raw materials in parts by weight Prepared: 30 parts of polyether polyol with a functionality of 5 and a number average molecular weight of 2000, 1-methyl-2,4-diisocyanatocyclohexane, 1-isocyanomethyl-3- 58 parts of a mixture of isocyano-1,5,5-trimethylcyclohexane and xylene diisocyanate, 8 parts of modified nanocrystalline cellulose (same as Example 1), N-ethylaminoisopropyl 4 parts of a mixture of phenyl trimethoxysilane, anilinopropyl trimethoxysilane and γ-ureaprop...

Embodiment 3

[0030] Mix unidirectional solvent-free polyurethane resin and leveling agent, heat to a molten state to obtain slurry; coat the slurry prepared in step S1 on the release layer, dry and solidify, and obtain a surface coated with a solvent-free polyurethane layer layer, the substrate layer is rolled and bonded to the surface layer coated with a solvent-free polyurethane layer, and then dried and cured to obtain artificial leather; wherein, the unidirectional solvent-free polyurethane resin consists of the following raw materials in parts by weight Prepared: 26 parts of polyether polyol with a functionality of 4 and a number average molecular weight of 6000, 1-isocyanomethyl-3-isocyano-1,5,5-trimethylcyclohexane and di 62 parts of a mixture of toluene diisocyanate, 8 parts of modified nanocrystalline cellulose (same as Example 1), 4 parts of a mixture of anilinopropyltrimethoxysilane and γ-ureapropyltrimethoxysilane, the preparation Method is with embodiment 1.

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Abstract

The invention discloses a manufacturing method of an unidirectional solvent-free polyurethane resin artificial leather. A surface layer, a matrix layer and a solvent-free polyurethane layer coated between the surface layer and the matrix layer are included, the manufacturing method comprises the following steps that S1, an unidirectional solvent-free polyurethane resin and a leveling agent are mixed and heated to a molten state to obtain slurry; S2, a release layer is coated with the slurry prepared by the step S1, and drying and curing are conducted to obtain the surface layer coated with thesolvent-free polyurethane layer; and S3, the matrix layer is rolled onto the surface, coated with the solvent-free polyurethane layer, of the surface layer, and then drying and curing are conducted to obtain the artificial leather; and wherein with the polyurethane resin as the total weight, the unidirectional solvent-free polyurethane resin is prepared from the following raw materials in parts by weight: 25-30 parts of polyether polyol, 58-65 parts of cyclic isocyanate, 5-8 parts of modified nanocrystalline cellulose and 2-6 parts of an amino silane coupling agent. The manufacturing method is simple, low in cost and suitable for large-scale promotion.

Description

technical field [0001] The invention relates to the technical field of artificial leather, in particular to a method for manufacturing unidirectional solvent-free polyurethane resin artificial leather. Background technique [0002] With the development of industrial technology, the production technology of artificial leather is also improving day by day. Polyurethane is used as raw material to match different substrate layers (plain woven fabric, double-sided / four-sided elastic fabric, non-woven superfiber fabric, etc.), and appropriate processing Therefore, compared with natural leather, artificial leather has the advantages of multi-function and diversification. [0003] Existing artificial leather usually uses solvent-based polyurethane resin (Polyurethane, PU for short) with a solid content of 40 to 60% as the main raw material for the leather surface of artificial leather. In addition to the organic solvents contained in the polyurethane resin itself (for example: dime...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00C08G18/48C08B15/02
CPCD06N3/145D06N3/146D06N3/148D06N3/0097D06N3/0061C08G18/4829C08B15/02D06N2211/28D06N2209/16D06N2209/1642D06N2209/1621D06N2209/103
Inventor 张哲黄从东周文贽
Owner TIANSHOU FUJIAN SUPERFIBER TECH
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