A kind of preparation method of water-based superfine fiber synthetic leather

A technology of superfine fiber and synthetic leather, applied in fiber processing, textiles and papermaking, etc., can solve the problems of tightness and inactivity of synthetic leather surface, poor leather feeling, etc., and achieve the effect of full hand feeling and strong leather feeling.

Active Publication Date: 2022-06-24
ZHEJIANG TRANSFAR FUNCTIONAL NEW MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyurethane resin in the water-based superfine fiber synthetic leather is evenly distributed from the surface to the inside, resulting in a tight and inactive surface of the synthetic leather, and a poor leather feel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Coat the surface of the water-soluble polyester / polyamide sea-island fiber non-woven fabric with a water-based hydrophobic aid, and then dry it at 100 °C. The hydrophobic aid after drying and curing accounts for the majority of the quality of the non-woven fabric. 2%, so as to obtain the base fabric A with surface hydrophobic pretreatment;

[0024] Among them, the water-based hydrophobic auxiliary agent is Dow Corning's water-based hydrophobic agent DC-51.

[0025] (2) Immerse the base fabric A obtained in step (1) into the water-based polyurethane impregnating resin evenly for 5 minutes, and then pass the roller to control the impregnation amount of the polyurethane impregnating resin to be 60% of the weight of the non-woven fabric, and then at 100 ° C Under the conditions of drying, the polyurethane impregnated resin is cured to obtain the composite base fabric B;

[0026] Among them, the water-based polyurethane impregnating resin is Covestro's water-based polyu...

Embodiment 2

[0030] (1) Coat the surface of the water-soluble polyester / polyamide sea-island fiber non-woven fabric with a water-based hydrophobic aid, and then dry it at 110 °C. The hydrophobic aid after drying and curing accounts for the majority of the quality of the non-woven fabric. 3%, so as to obtain the base fabric A with surface hydrophobic pretreatment;

[0031] Among them, the water-based hydrophobic auxiliary agent is Dow Corning's water-based hydrophobic agent IE-6683.

[0032] (2) Immerse the base fabric A obtained in step (1) into the water-based polyurethane impregnating resin evenly for 5 minutes, and then pass the roller to control the impregnation amount of the polyurethane impregnating resin to be 50% of the weight of the non-woven fabric, and then at 110 ° C Under the conditions of drying, the polyurethane impregnated resin is cured to obtain the composite base fabric B;

[0033] Among them, the waterborne polyurethane impregnating resin is Covestro's waterborne polyu...

Embodiment 3

[0037](1) The surface of the water-soluble polyester / polyester sea-island fiber non-woven fabric is coated with water-based hydrophobic auxiliary, and then dried at 90 °C. The hydrophobic auxiliary after drying and curing accounts for the majority of the quality of the non-woven fabric. 3%, so as to obtain the base fabric A with surface hydrophobic pretreatment;

[0038] Among them, the water-based hydrophobic additive is the water-based hydrophobic agent HY-4100 of Chengdu Zhaojiang Technology.

[0039] (2) Dip the base fabric A obtained in step (1) into the water-based polyurethane impregnating resin evenly for 6 minutes, and then pass the roller to control the impregnation amount of the polyurethane impregnating resin to be 60% of the weight of the non-woven fabric, and then at 120 ° C Under the conditions of drying, the polyurethane impregnated resin is cured to obtain the composite base fabric B;

[0040] Among them, the water-based polyurethane impregnating resin is Cov...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention discloses a preparation method of water-based superfine fiber synthetic leather. The invention comprises steps: 1) coating the surface of the island-in-sea fiber nonwoven fabric with a water-based hydrophobic auxiliary agent and then drying and curing to obtain a base cloth A pretreated with surface hydrophobicity; 2) the base cloth A is evenly immersed in the water-based polyurethane impregnating resin, The base cloth A is fully impregnated by rolling, and then dried and solidified to obtain the composite base cloth B; 3) The composite base cloth B is subjected to alkali reduction, water washing, acid neutralization and drying treatment to remove the ” components and hydrophobic additives to obtain superfine fiber base fabric C; 4) microfiber base fabric C was sanded, dyed, and softened to obtain water-based microfiber synthetic leather with a gradient distribution of polyurethane impregnated resin. In the present invention, the density of the superfine fiber synthetic leather has obvious gradient change, the surface is flexible, and the inside is compact, so that the sensual elasticity and fullness of the product are increased, and the simulation effect is better.

Description

technical field [0001] The invention relates to the field of superfine fiber synthetic leather, in particular to a preparation method of water-based superfine fiber synthetic leather. Background technique [0002] The surface of natural leather is formed by the interweaving of very small collagen fibers, and the inside is interwoven with bundles of collagen fibers to form a three-dimensional interwoven three-dimensional network structure. This active surface and internal compact structure determine the excellent feel of natural leather. Microfiber synthetic leather is based on a non-woven fabric made of sea-island microfibers into a three-dimensional network structure. After the microfiber non-woven fabric is opened, each sea-island fiber is separated into a bundle of fibers, and a three The interwoven network structure is very similar to the bundled collagen fibers in natural leather, and can be comparable to natural leather in terms of physical properties, making it the be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14D06N3/00D06M15/643
CPCD06N3/14D06N3/0004D06M15/643D06N2211/28
Inventor 余冬梅王小君熊露王胜鹏牟静余学康陈八斤
Owner ZHEJIANG TRANSFAR FUNCTIONAL NEW MATERIAL CO LTD
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