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Preparation method of water-based superfine fiber synthetic leather

A technology of superfine fiber and synthetic leather, which is applied in fiber processing, textiles and papermaking, etc. It can solve the problems of poor leather feel, tight and inflexible surface of synthetic leather, etc., and achieve the effect of strong leather feeling and full hand feeling

Active Publication Date: 2020-04-21
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 nonwoven with a water-based hydrophobic additive, and then dry it at 100°C. The hydrophobic additive after drying and curing accounts for 2%, thereby making the base cloth A of surface hydrophobic pretreatment;

[0024] Wherein, the water-based hydrophobic additive is the water-based hydrophobic agent DC-51 of American Dow Corning.

[0025] (2) Evenly immerse the base fabric A prepared in step (1) into the water-based polyurethane impregnated resin for 5 minutes, and then pass it through the rollers to control the impregnation amount of the polyurethane impregnated resin to 60% of the weight of the nonwoven fabric, and then heat it at 100°C Drying treatment is carried out under certain conditions to solidify the polyurethane impregnated resin, so as to obtain the composite base cloth B;

[0026] Among them, the waterborne polyurethane impregnation resin is Covestro's waterborne polyurethane ...

Embodiment 2

[0030] (1) Coat the surface of the water-soluble polyester / polyamide sea-island fiber nonwoven with a water-based hydrophobic additive, and then dry it at 110°C. The hydrophobic additive after drying and curing accounts for 3%, thereby making the base cloth A of surface hydrophobic pretreatment;

[0031] Wherein, the water-based hydrophobic additive is the water-based hydrophobic agent IE-6683 of Dow Corning in the United States.

[0032] (2) Evenly immerse the base fabric A prepared in step (1) into the water-based polyurethane impregnated resin for 5 minutes, and then pass through the rollers to control the impregnation amount of the polyurethane impregnated resin to 50% of the weight of the nonwoven fabric, and then heat it at 110°C Drying treatment is carried out under certain conditions to solidify the polyurethane impregnated resin, so as to obtain the composite base cloth B;

[0033] Among them, the waterborne polyurethane impregnation resin is Covestro's waterborne po...

Embodiment 3

[0037](1) Coat the surface of the water-soluble polyester / polyester island-in-the-sea fiber nonwoven fabric with a water-based hydrophobic additive, and then dry it at 90°C. The hydrophobic additive after drying and curing accounts for 3%, thereby making the base cloth A of surface hydrophobic pretreatment;

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

[0039] (2) Evenly immerse the base fabric A prepared in step (1) into the water-based polyurethane impregnated resin for 6 minutes, and then pass through the rollers to control the impregnation amount of the polyurethane impregnated resin to 60% of the weight of the nonwoven fabric, and then heat it at 120°C Drying treatment is carried out under certain conditions to solidify the polyurethane impregnated resin, so as to obtain the composite base cloth B;

[0040] Among them, the waterborne polyurethane impregnation resin is Covestro's waterbo...

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PUM

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Abstract

The invention discloses a preparation method of water-based superfine fiber synthetic leather. The preparation method comprises the steps of: 1, coating the surface of a sea-island fiber non-woven fabric with a water-based hydrophobic assistant and then carrying out drying curing to obtain a base fabric A subjected to surface hydrophobic pretreatment; 2, uniformly immersing the base fabric A intowater-based polyurethane impregnation resin, sufficiently impregnating the base fabric A by a roller, and then carrying out drying curing to obtain a composite base fabric B; 3, carrying out alkali decrement, washing, acid neutralization and drying treatment on the composite base fabric B, and removing a 'sea' component and the hydrophobic assistant in the composite base fabric B to obtain a superfine fiber base fabric C; and 4, carrying out sueding, dyeing and softening treatment on the superfine fiber base fabric C so as to obtain the water-based superfine fiber synthetic leather with polyurethane impregnation resin gradient distribution. In the invention, a density of the superfine fiber synthetic leather has an obvious gradient change; the surface of the superfine fiber synthetic leather is active and the inside of the superfine fiber synthetic leather is compact; sensuality elasticity and hand feel fullness of the product are improved; and a 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 fine collagen fibers, and the interior 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 hand feel of natural leather. Microfiber synthetic leather is based on a nonwoven fabric with a three-dimensional network structure made of sea-island superfine fibers. After the superfine fiber nonwoven fabric is opened, each sea-island fiber is separated into a bundle of fibers and forms a three-dimensional fabric. The interwoven network structure is very similar to the bundled collagen fibers in natural leather, and can be compared with natural leather in terms o...

Claims

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Application Information

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Patent Type & Authority Applications(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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