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Method for producing superfine fiber synthetic leather base fabric by adopting waterborne polyurethane dipping compound method

A water-based polyurethane and ultra-fine fiber technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of MDF residue in ultra-fine fiber synthetic leather, so as to solve the residual problem and improve moisture absorption. Moisture removal performance, the effect of eliminating pollution problems

Inactive Publication Date: 2013-02-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method that can not only eliminate the pollution problem caused by the use of solvent DMF, but also solve the problem of MDF residue in ultrafine fiber synthetic leather, and can also improve the moisture absorption and dehydration performance of the base cloth, and improve the ultrafine fiber synthetic leather. The hygienic performance of fiber synthetic leather adopts the method of producing superfine fiber synthetic leather base cloth by water-based polyurethane impregnation composite method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) impregnated with water-based polyurethane

[0023] Mix 50 parts of water-based polyurethane, 1 part of polyacrylic resin thickener and 4 parts of higher alkanol with 8 to 31 carbon atoms, that is, higher carbon alcohol, in parts by mass, and then add 3 parts of chemical foaming agent to it Azobisisobutyronitrile (AIBN) is evenly dispersed to impregnate the aqueous polyurethane solution;

[0024] Using the impregnation equipment commonly used in the production of ultrafine fiber synthetic leather, pass the ultrafine fiber nonwoven fabric through the impregnation tank equipped with impregnated water-based polyurethane solution, so that the impregnated aqueous polyurethane solution completely soaks the ultrafine fiber nonwoven fabric; then pass through the paddle car, Control the width of the gap between the rollers to be 80% of the thickness of the superfine fiber nonwoven fabric, and squeeze out the excess slurry;

[0025] 2) dry foaming

[0026] Dry the microfiber ...

Embodiment 2

[0030] 1) impregnated with water-based polyurethane

[0031] Mix 70 parts of water-based polyurethane, 5 parts of polyacrylic resin thickener and 4.5 parts of higher alkanols with 8 to 31 carbon atoms, that is, high-carbon alcohols, in parts by mass, and then add 5 parts of chemical foaming agents to it Azobisisobutyronitrile (AIBN) is evenly dispersed to impregnate the aqueous polyurethane solution;

[0032] Using impregnation equipment commonly used in the production of ultrafine fiber synthetic leather, pass the ultrafine fiber nonwoven fabric through the impregnation tank equipped with impregnated water-based polyurethane solution, so that the impregnated aqueous polyurethane solution completely soaks the ultrafine fiber nonwoven fabric; then pass through the paddle car, Control the width of the gap between the rollers to 90% of the thickness of the superfine fiber nonwoven fabric, and squeeze out the excess slurry;

[0033] 2) dry foaming

[0034] Dry the superfine fibe...

Embodiment 3

[0038] 1) impregnated with water-based polyurethane

[0039] Mix 60 parts of water-based polyurethane, 3 parts of polyacrylic resin thickener and 3 parts of higher alkanol with 8 to 31 carbon atoms, that is, higher carbon alcohol, in parts by mass, and then add 2 parts of chemical foaming agent to it Azobisisobutyronitrile (AIBN) is evenly dispersed to impregnate the aqueous polyurethane solution;

[0040] Using impregnation equipment commonly used in the production of ultrafine fiber synthetic leather, pass the ultrafine fiber nonwoven fabric through the impregnation tank equipped with impregnated water-based polyurethane solution, so that the impregnated aqueous polyurethane solution completely soaks the ultrafine fiber nonwoven fabric; then pass through the paddle car, Control the width of the gap between the rollers to be 75% of the thickness of the superfine fiber nonwoven fabric, and squeeze out the excess slurry;

[0041] 2) dry foaming

[0042] Dry the superfine fibe...

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Abstract

The invention relates to a method for producing superfine fiber synthetic leather base fabric by adopting a waterborne polyurethane dipping compound method, which comprises the following steps of: adopting a superfine fiber nonwoven as a base material; adopting a dipping compound device in a superfine fiber synthetic leather processing process; firstly passing the superfine fiber nonwoven through a dipping tank filled with mixed sizing agent of the waterborne polyurethane, chemical foaming agent and higher alcohols so as to be dipped in the mixed sizing agent completely; then passing through a padder, controlling the volume of the sizing agent in the superfine fiber nonwoven through a gap width between rollers, squeezing the redundant sizing agent, drying through a drying oven, controlling the drying temperature and time to carry out chemical foaming, forming a porous filling body through the waterborne polyurethane filled between fibers of the superfine fiber nonwoven, and obtaining the superfine fiber synthetic leather base fabric; and finally, rinsing the superfine fiber synthetic leather base fabric by hot water, forming a continuous porous waterborne polyurethane filling body, and obtaining the superfine fiber synthetic leather base fabric with air permeability and water vapor permeability.

Description

technical field [0001] The invention relates to a production process of superfine fiber synthetic leather, in particular to a method for producing superfine fiber synthetic leather base cloth by using a water-based polyurethane impregnation compounding method. Background technique [0002] Due to the limited resources of raw leather used to produce natural leather, and the production of natural leather is a process of high energy consumption and high pollution, it will bring a huge pollution load to the environment. In recent years, developed countries such as the European Union have also proposed new standards for the safety of natural leather itself, strictly restricting the presence of toxic chemicals such as Cr(VI), azo dyes, pentachlorophenol (PCP) and free formaldehyde in natural leather . From the perspective of raw leather resources, environmental protection, product safety and market, the production of natural leather is facing great challenges. [0003] For the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14B32B27/12B32B27/18B32B27/40
Inventor 马兴元吴泽郭勇生蒋坤
Owner SHAANXI UNIV OF SCI & TECH
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