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Waterborne polyurethane superfine fiber synthetic leather original base fabric and preparation method thereof

A technology of water-based polyurethane and microfiber, which is applied in textile/flexible product manufacturing, final product manufacturing, and climate sustainability. It can solve the problems of increasing leather brittleness and insufficient flexibility, and achieve strong leather feeling and fine cells. structure effect

Active Publication Date: 2017-05-24
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mechanical foaming will be difficult to control because some air bubbles will be filtered out by sea-island non-woven fabrics. Coagulation in salt bath and acid bath will increase the brittleness of leather and cause insufficient flexibility. Chemical foaming is currently not suitable for water-based polyurethane systems. agent

Method used

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  • Waterborne polyurethane superfine fiber synthetic leather original base fabric and preparation method thereof
  • Waterborne polyurethane superfine fiber synthetic leather original base fabric and preparation method thereof
  • Waterborne polyurethane superfine fiber synthetic leather original base fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation steps of the water-based microfiber synthetic leather of the present embodiment are as follows:

[0033] Preparation of water-based impregnating resin:

[0034] Table 1

[0035]

[0036] Mix the raw materials in Table 1 evenly to prepare a water-based impregnating resin with a viscosity of about 3000mPa.S@25°C.

[0037] Preparation of primary base cloth:

[0038] Impregnate the island-in-the-sea non-woven fabric in the water-based impregnating resin, control the liquid content to 100%, scrape off the surface resin with a scraper, and then dry it in an oven at 90°C to obtain an impregnated base cloth; put the impregnated base cloth into the In the measuring process, use 75°C toluene to reduce the weight for 3 hours, and dry the base fabric after the reduction is completed on a 110-130°C expansion drying equipment to obtain a primary base fabric.

[0039] The water-based polyurethane microfiber synthetic leather can be obtained by dyeing, oiling, buf...

Embodiment 2

[0043] Preparation of water-based impregnating resin:

[0044] Table 2

[0045]

[0046] Mix the raw materials in Table 2 evenly to prepare a water-based impregnating resin with a viscosity of about 6000mPa.S@25°C.

[0047] Preparation of primary base cloth:

[0048] The sea-island type non-woven fabric is impregnated in the water-based impregnating resin, the liquid content is controlled to 80%, the surface resin is scraped off with a scraper, and then dried in an oven at 130°C to obtain an impregnated base cloth; the impregnated base cloth is put into a In the measuring process, use 90°C toluene to reduce the weight for 1 hour, and dry the base fabric after the reduction is completed on a 110-130°C expansion drying equipment to obtain a primary base fabric;

[0049] The raw base cloth is dyed, sanded and oiled according to the method reported in the literature to obtain suede water-based superfine fiber synthetic leather, which can be used for clothing, gloves, decorati...

Embodiment 3

[0053] The preparation steps of the water-based microfiber synthetic leather of the present embodiment are as follows:

[0054] Preparation of water-based impregnating resin:

[0055] table 3

[0056]

[0057]Mix the raw materials in Table 3 evenly to prepare a water-based impregnating resin with a viscosity of about 5500mPa.S@25°C.

[0058] Preparation of primary base cloth:

[0059] Impregnate the sea-island non-woven fabric into the water-based impregnating resin, control the liquid content to 90%, scrape off the surface resin with a scraper, and then dry it in an oven at 120°C to obtain the impregnated base cloth; put the impregnated base cloth into the In the measuring process, use 80°C toluene to reduce the weight for 2 hours, and dry the base fabric after the reduction is completed on a 110-130°C expansion drying equipment to obtain a primary base fabric.

[0060] Water-based microfiber synthetic leather is obtained by dyeing, oiling, buffing, and veneering the or...

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Abstract

The invention discloses a waterborne polyurethane superfine fiber synthetic leather original base fabric and a preparation method thereof. The preparation method comprises the following steps: (1) impregnating an island type non-woven fabric in water-based impregnating resin containing polymer micro-particles, and then scraping off the resin on the surface of the island type non-woven fabric to obtain an impregnated base fabric, wherein the polymer micro-particles are one or more of polyolefin micro-particles or polystyrene micro-particles; and (2) putting the impregnated base fabric into methylbenzene to perform decrement so as to obtain the original basic fabric. According to the preparation method disclosed by the invention, under the condition that the processes are not increased, the size and amount of a cellular structure are adjusted by changing the size and amount of the polymer micro-particles, so that diversification of the product is achieved, the polymer after decrement can be recycled together with marine facies, and waterborne polyurethane superfine fiber synthetic leather prepared by adopting the prepared base fabric has a relatively exquisite cellular structure.

Description

technical field [0001] The invention relates to a preparation method for preparing polyurethane superfine fiber synthetic leather base cloth. Background technique [0002] Microfiber synthetic leather is a composite material composed of microfiber and polyurethane. It has the characteristics of structural simulation, air permeability, and softness. It is one of the ideal substitute materials for genuine leather. It is widely used in sofas, cars, bags, and shoemaking. and other fields. At present, most of the domestic microfiber synthetic leathers are prepared by the toluene reduction process. The typical steps are as follows: 1) DMF solution of polyurethane is impregnated with island-in-the-sea type non-woven fabric, and the DMF-H 2 Polyurethane micropores are formed by solidification in O solution; 2) extract the sea phase in the fiber by hot toluene; 3) make superfine fiber synthetic leather base cloth through drying, oiling, dyeing and other treatment processes; 4) throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0004D06N3/0011D06N3/0043D06N3/0061D06N3/0068D06N3/0086D06N3/14D06N2205/023D06N2211/28Y02P70/62
Inventor 杨银龙韩芹张其斌段伟东杜明兵刘国张浩
Owner HUAFON MICROFIBER SHANGHAI