Method for preparing suede waterborne polyurethane superfine fiber synthetic leather

A water-based polyurethane and microfiber technology, applied in dyeing, textile and papermaking, etc., can solve the problems of heavy metals easily exceeding the standard in neutral dye dyeing, poor thermal migration resistance of disperse dyes, DMF pollution, etc., and achieve good health. , The effect of solving product safety problems and safe production environment

Inactive Publication Date: 2013-01-16
FUJIAN KELIDA SYNTHETIC FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a method that can solve the problem of DMF pollution generated in the production of suede solvent-type ultra-fine fiber polyurethane synthetic leather, the product safety problem caused by the residue of DMF in the product, the problem that the heavy metal dyeing of neutral dyes is easy to exceed the standard, and The problem of poor thermal migration resistance of disperse dyes, the preparation method of suede water-based polyurethane superfine fiber synthetic leather with good dyeing effect and production environment friendly

Method used

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  • Method for preparing suede waterborne polyurethane superfine fiber synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Impregnation compounding of non-woven fabric and cationic water-based polyurethane

[0045] 1.1) Preparation of immersion solution

[0046] Mix 20 parts of cationic water-based polyurethane with a solid content of 30% and 35 parts of water by weight to obtain an impregnating liquid;

[0047] 1.2) Preparation of coagulation liquid

[0048] Mix 10 parts by weight of inorganic salt sodium sulfate, 5 parts of inorganic alkali sodium carbonate and 60 parts of water under stirring to dissolve inorganic salt and inorganic alkali to obtain coagulation liquid;

[0049] 1.3) Impregnation compounding process

[0050] First, pass the nylon 6 / polyethylene bi-component fiber non-woven fabric through an impregnation tank equipped with an impregnation liquid with a temperature of 35 ° C, so that the impregnation liquid is saturated with the nylon 6 / polyethylene bi-component fiber non-woven fabric;

[0051] Secondly, the impregnated nylon 6 / polyethylene bicomponent fiber non-woven...

Embodiment 2

[0060] 1) Impregnation compounding of non-woven fabric and cationic water-based polyurethane

[0061] 1.1) Preparation of immersion solution

[0062] Mix 65 parts of cationic water-based polyurethane with a solid content of 30% and 70 parts of water by weight to obtain an impregnating liquid;

[0063] 1.2) Preparation of coagulation liquid

[0064] By weight, 20 parts of inorganic salt sodium chloride, 8 parts of inorganic alkali sodium bicarbonate and 80 parts of water are mixed under stirring to dissolve inorganic salt and inorganic alkali to obtain coagulation liquid;

[0065] 1.3) Impregnation compounding process

[0066] First, pass the nylon 6 / polyethylene bicomponent fiber non-woven fabric through an impregnation tank equipped with an impregnation liquid with a temperature of 30 ° C, so that the impregnation liquid is saturated with the nylon 6 / polyethylene bicomponent fiber nonwoven fabric;

[0067] Secondly, the impregnated nylon 6 / polyethylene bicomponent fiber no...

Embodiment 3

[0076] 1) Impregnation compounding of non-woven fabric and cationic water-based polyurethane

[0077] 1.1) Preparation of immersion solution

[0078] Mix 60 parts of cationic water-based polyurethane with a solid content of 30% and 80 parts of water by weight to obtain an impregnating liquid;

[0079] 1.2) Preparation of coagulation liquid

[0080] Mix by weight 15 parts of inorganic salt ammonium sulfate, 9 parts of inorganic alkali sodium hydroxide and 85 parts of water under stirring to dissolve inorganic salt and inorganic alkali to obtain coagulation liquid;

[0081] 1.3) Impregnation compounding process

[0082] First, pass the nylon 6 / polyethylene bi-component fiber non-woven fabric through an impregnation tank equipped with an impregnation liquid with a temperature of 40 ° C, so that the impregnating liquid is saturated with the nylon 6 / polyethylene bi-component fiber non-woven fabric;

[0083] Secondly, the impregnated nylon 6 / polyethylene bicomponent fiber non-wov...

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Abstract

The invention provides a method for preparing suede waterborne polyurethane superfine fiber synthetic leather. The method comprises the following steps of: obtaining superfine fiber waterborne polyurethane synthetic leather bass by taking a polyamide 6 / polyethylene (PA6 / PE) bicomponent fiber non-woven fabric as a base material by a cationic waterborne polyurethane impregnation / demulsification agglomeration composite method and a methylbenzene decrement fiber separation method; and finally, obtaining the suede waterborne polyurethane superfine fiber synthetic leather by strong acid dye and weak acid dye matched dyeing and buffing after-treatment technologies. The problem of dimethyl formamide (DMF) pollution which is caused by a current solvent type production system, the problem of product safety which is caused by the residue of DMF in products, and the problems that heavy metals can exceed the standard easily and the heat migration resistance of dyes is low are solved.

Description

technical field [0001] The invention relates to the technical field of superfine fiber synthetic leather, in particular to a preparation method of a suede water-based polyurethane superfine fiber synthetic leather Background technique [0002] Natural leather resources are limited, and the production process will produce large pollution. Therefore, the development of artificial synthetic leather with excellent performance has become the pursuit of mankind. Among them, the microfiber non-woven fabric with a three-dimensional network structure is used as the reinforcing material, and the microfiber synthetic leather obtained by impregnating polyurethane is close in terms of internal microstructure, appearance, texture, physical properties, and people's wearing comfort. natural leather. At present, more than 90% of high-end sports shoes in the world are made of microfiber synthetic leather. Most of the three major ball leathers are made of microfiber synthetic leather. High-e...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06P1/39D06P3/24
Inventor 施凌山马兴元牛建民张晓镭
Owner FUJIAN KELIDA SYNTHETIC FIBER
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