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Polyurethane synthetic leather with high moisture absorption and air permeability and preparation method thereof

A moisture-absorbing, breathable, water-based polyurethane technology, applied in the field of synthetic leather, can solve problems such as affecting the hand feel and burr feeling on the surface of synthetic leather, and achieve the effect of good hand feeling

Active Publication Date: 2021-11-09
东阳德彩纺织品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent document with the application number CN201810850749.3 discloses "preparation method of hygroscopic, antibacterial and water vapor permeable graphene-modified polyurethane synthetic leather", wherein, by adding graphene wit

Method used

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  • Polyurethane synthetic leather with high moisture absorption and air permeability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A polyurethane synthetic leather with high moisture absorption and air permeability, comprising a non-woven base cloth and a polyurethane coating, wherein the polyurethane coating includes the following raw materials in parts by weight: 80 parts of water-based polyurethane emulsion, 2 parts of surfactant, and moisture-absorbing and breathable particles 5 parts, 0.1 part of water-soluble cellulose thickener, 0.1 part of isocyanate crosslinking agent.

[0031] The moisture-absorbing and air-permeable particles include diatomaceous earth and a porous hydrophilic polymer coating layer with a thickness of 10-20 μm coated on the diatomite, and its preparation method includes the following steps:

[0032] (A) Diatomite surface treatment: Mix 3-aminopropyltrimethoxysilane and water at a mass ratio of 1:70 to make a coupling agent solution; add a particle size of 300- 400 mesh diatomite, the mass ratio of the diatomite to the coupling agent solution is 1:50, after fully disperse...

Embodiment 2

[0039] A polyurethane synthetic leather with high moisture absorption and air permeability, comprising a non-woven base cloth and a polyurethane coating, wherein the polyurethane coating includes the following raw materials in parts by weight: 90 parts of water-based polyurethane emulsion, 2 parts of surfactant, and moisture-absorbing and breathable particles 8 parts, 1 part of water-soluble cellulose thickener, 1 part of isocyanate crosslinking agent, 4 parts of water-based pigment paste.

[0040]The moisture-absorbing and air-permeable particles include diatomaceous earth and a porous hydrophilic polymer coating layer with a thickness of 10-20 μm coated on the diatomite, and its preparation method includes the following steps:

[0041] (A) Diatomite surface treatment: Mix 3-aminopropyltrimethoxysilane and water at a mass ratio of 1:65 to make a coupling agent solution; add a particle size of 300- 400-mesh diatomite, the mass ratio of diatomite to coupling agent solution is 1...

Embodiment 3

[0048] A polyurethane synthetic leather with high moisture absorption and air permeability, comprising a non-woven base cloth and a polyurethane coating, wherein the polyurethane coating includes the following raw materials in parts by weight: 100 parts of water-based polyurethane emulsion, 6 parts of surfactant, and moisture-absorbing and breathable particles 10 parts, 2 parts of water-soluble cellulose thickener, 2 parts of isocyanate crosslinking agent, 8 parts of water-based pigment paste.

[0049] The superfine fiber is fixed island superfine fiber; the thickener is polyurethane associative thickener; the colorant is water-based color paste and / or water-based toner.

[0050] The moisture-absorbing and air-permeable particles include diatomaceous earth and a porous hydrophilic polymer coating layer with a thickness of 10-20 μm coated on the diatomite, and its preparation method includes the following steps:

[0051] (A) Diatomite surface treatment: Mix 3-aminopropyltrimeth...

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Abstract

The invention relates to the technical field of synthetic leather, and discloses polyurethane synthetic leather with high moisture absorption and air permeability and a preparation method thereof. The polyurethane synthetic leather comprises non-woven fabric base cloth and a polyurethane coating, wherein the polyurethane coating comprises the following raw materials in parts by weight of 80-100 parts of a waterborne polyurethane emulsion, 2-6 parts of a surfactant, 5-10 parts of moisture-absorbing and breathable particles, 0.1-2 parts of a water-soluble cellulose thickener, 0.1-2 parts of an isocyanate cross-linking agent and 0-8 parts of a waterborne coloring agent; and the moisture-absorbing and breathable particles comprise diatomite and a porous hydrophilic polymer coating layer which coats the diatomite. In the moisture-absorbing breathable particles, the surface of the diatomite is coated with the porous hydrophilic polymer coating layer, so that a burr feeling on the surface of the synthetic leather due to addition of the diatomite can be prevented, and the moisture absorption and breathability of the diatomite cannot be greatly influenced.

Description

technical field [0001] The invention relates to the technical field of synthetic leather, in particular to a polyurethane synthetic leather with high moisture absorption and air permeability and a preparation method thereof. Background technique [0002] Synthetic leather is also called imitation leather or rubber. It is made of various formulas of polyvinyl chloride (PVC) or polyurethane (PU) foamed or coated on a textile or non-woven fabric base. It can be processed according to the requirements of different strength, wear resistance, cold resistance, color, luster, pattern, etc. It has the characteristics of various designs and colors, good waterproof performance, neat edges, high utilization rate and relatively cheap price compared with real leather. [0003] Synthetic leather with textile fabric as the base and polyurethane as the coating has a history of more than 80 years, and has been widely used in various aspects of people's lives. The traditional polyurethane s...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/14D06N3/0011D06N3/0063D06N3/0059D06N2211/28D06N2209/123D06N2209/1642D06N2209/148Y02P70/62
Inventor 胡玉婷
Owner 东阳德彩纺织品有限公司