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Polyurethane dry process middle layer, polyurethane synthetic leather and preparation method thereof

A polyurethane and synthetic leather technology, applied in the field of synthetic leather, can solve the problems of poor wear resistance and scratch resistance, and achieve the effect of strong performance

Active Publication Date: 2017-11-24
HESHAN XINKEDA ENTERPRISE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor wear resistance and scratch resistance existing in the existing polyurethane synthetic leather, the present invention proposes a polyurethane dry process middle layer, which not only has a compact structure and no cells, but also the middle layer can penetrate into the substrate layer, greatly improving the synthetic leather. Wear resistance of leather

Method used

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  • Polyurethane dry process middle layer, polyurethane synthetic leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A polyurethane dry-process middle layer, calculated according to parts by weight, its formula is:

[0026] The hydrolysis-resistant polyurethane is 80 parts of Asahikawa Chemical (XCS-3082S), 30 parts of calcium carbonate, and the polyurethane curing agent is Asahikawa (XAC-77)-curing agent (the content of isocyanate is 13-14%) 5 parts , 15 parts each of ethyl acetate and dimethylformamide.

[0027] The preparation method is as follows: dissolve Asahikawa Chemical (XCS-3082S) in ethyl acetate and dimethylformamide, and stir evenly, then slowly add calcium carbonate and store the stirred material for production, and quickly add Asahikawa (XCS-3082S) before production XAC-77)-The curing agent should be stirred quickly, and it should be used as soon as possible after stirring evenly (this step avoids the failure of the NCO active group of the curing agent).

[0028] A polyurethane synthetic leather, comprising a polyurethane dry-process surface layer, a polyurethane dry-p...

Embodiment 2

[0030] A polyurethane dry-process middle layer, calculated in parts by weight, comprises the following components:

[0031] 70 parts of hydrolysis-resistant polyurethane with a molecular weight of 350,000-400,000, 20 parts of lignocellulose and diatomaceous earth, 2 parts of polyurethane curing agent (the content of isocyanate is 10%) and 40 parts of dimethylformamide.

[0032] The preparation method is as follows: dissolve the hydrolysis-resistant polyurethane in dimethylformamide, and stir evenly, then slowly add lignocellulose and diatomaceous earth to store the stirred material for production, and quickly add polyurethane curing agent before production. Stir quickly, and use it as soon as possible after stirring evenly (this step prevents the NCO active group of the curing agent from becoming invalid).

[0033] A polyurethane synthetic leather, comprising a polyurethane dry-process surface layer, a polyurethane dry-process middle layer and a substrate layer, the polyuretha...

Embodiment 3

[0035] A polyurethane dry-process middle layer, calculated in parts by weight, comprises the following components:

[0036] 100 parts of hydrolysis-resistant polyurethane with a molecular weight of 100,000-150,000, 30 parts of lignocellulose and diatomaceous earth, 8 parts of polyurethane curing agent (with an isocyanate content of 15%) and 60 parts of butyl acetate.

[0037] The preparation method is as follows: dissolve the hydrolysis-resistant polyurethane in butyl acetate, and stir evenly, then slowly add lignocellulose and diatomaceous earth to store the stirred material for production, and quickly add polyurethane curing agent for rapid stirring before production After stirring evenly, use it as soon as possible (this step avoids the NCO active group of the curing agent from being invalidated).

[0038] A polyurethane synthetic leather, comprising a polyurethane dry-process surface layer, a polyurethane dry-process middle layer and a substrate layer, the polyurethane dry...

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Abstract

The invention provides a polyurethane dry method intermediate layer as well as polyurethane synthetic leather and a preparation method thereof. The polyurethane dry method intermediate layer comprises the following components in parts by weight: 70-100 parts of anti-hydrolysis polyurethane, 30-60 parts of a filler, 2-10 parts of a polyurethane curing agent and 30-60 parts of an organic solvent. The polyurethane leather comprises a polyurethane dry method surface layer, the polyurethane dry method intermediate layer and a substrate layer, wherein the polyurethane dry method intermediate layer is positioned between the polyurethane dry method surface layer and the substrate layer. The preparation method for the polyurethane synthetic leather comprises the following steps: coating release paper with a sizing agent of the polyurethane dry method surface layer, heating, drying, coating the dried polyurethane dry method surface layer with a binder of the polyurethane dry method intermediate layer, heating, drying, using a fit wheel to enable the base substrate layer to be pressed on the dried polyurethane dry method intermediate layer, heating, drying, curing, and finally cooling and stripping. The polyurethane dry method intermediate layer not only is compact in structure and free of bubble holes, but also can be permeated into the substrate layer, so that the wear resisting property of synthetic leather is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, and in particular relates to a polyurethane dry-process middle layer, polyurethane synthetic leather and a preparation method thereof. Background technique [0002] Polyurethane synthetic leather generally consists of a three-layer structure of polyurethane dry-process surface layer, polyurethane wet-process middle layer and cloth material, among which the polyurethane wet-process middle layer is a porous structure. There are a large number of microporous structures in the middle layer of polyurethane wet process, resulting in poor wear resistance and scratch resistance of the product. The basic wear resistance can only reach the H-18 grinding wheel tested by TABER, with a load of 500g, 500-1000 revolutions, and a load of 1KG, the scratch resistance is only about 100-1000 times, not to mention the sharp objects such as keys. The peel strength of ordinary polyurethane synthetic leather ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D06N3/14C09D175/04C09D7/12
CPCC08K3/26C08K2003/265C09D7/61C09D7/65C09D175/04D06N3/0061D06N3/0063D06N3/0097D06N3/141D06N2211/28C08L97/00C08K3/34
Inventor 任志军任志营冯海钊
Owner HESHAN XINKEDA ENTERPRISE CO LTD
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