Waterborne impregnated resin, waterborne polyurethane superfine fiber synthetic leather and preparation method of waterborne polyurethane superfine fiber synthetic leather

A technology of water-based polyurethane and impregnated resin, which is applied in the direction of textiles and papermaking, which can solve the problems of insufficient and increase the flexibility of leather, achieve the effect of fine cell structure, reduce environmental pollution, and increase the release effect

Inactive Publication Date: 2017-10-10
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as water-based polyurethane impregnated by wet method, some air bubbles will be filtered out by sea-island non-woven fabric through mechanical foaming, which is difficult to control. Coagulation in salt bath and acid bath will increase the brittleness of leather and cause insufficient flexibility. Chemical foaming is currently still available. No suitable blowing agent for waterborne polyurethane systems

Method used

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  • Waterborne impregnated resin, waterborne polyurethane superfine fiber synthetic leather and preparation method of waterborne polyurethane superfine fiber synthetic leather
  • Waterborne impregnated resin, waterborne polyurethane superfine fiber synthetic leather and preparation method of waterborne polyurethane superfine fiber synthetic leather
  • Waterborne impregnated resin, waterborne polyurethane superfine fiber synthetic leather and preparation method of waterborne polyurethane superfine fiber synthetic leather

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]

[0037] Mix the raw materials in Table 1 evenly to prepare a water-based impregnating resin with a viscosity of about 5000mPa·S@25°C.

[0038] Preparation of primary base cloth:

[0039] 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 2 hours, and then use 105°C water to wash for 1 hour to wash away the residual toluene and dissolved soluble polymers, and dry the base cloth after the weight reduction is completed on a 120°C expansion drying equipment Dry to obtain ...

Embodiment 2

[0044] Preparation of water-based impregnating resin:

[0045] Table 2

[0046]

[0047] Mix the raw materials in Table 2 evenly to prepare a water-based impregnating resin with a viscosity of about 8000mPa·S@25°C.

[0048] Preparation of primary base cloth:

[0049] 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 85°C toluene to reduce the weight for 3 hours, wash with 100°C water for 2 hours to remove residual toluene and dissolved soluble polymers, and dry the base fabric after weight reduction on a 130°C expansion drying equipment. Prepare the original base cloth.

[0050] The water-based polyurethane microfiber synthetic leather can be obtained by dyeing, oiling, buffing and veneering the raw base cloth acc...

Embodiment 3

[0054] The preparation steps of the water-based microfiber synthetic leather of the present embodiment are as follows:

[0055] Preparation of water-based impregnating resin:

[0056] table 3

[0057]

[0058]Mix the raw materials in Table 3 evenly to prepare a water-based impregnating resin with a viscosity of about 3000mPa·S@25°C.

[0059] Preparation of primary base cloth:

[0060] 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, reduce the weight with 90°C toluene for 1 hour, then wash with 110°C water for 0.5 hours to remove residual toluene and dissolved soluble polymers, and dry the base fabric after weight reduction on a 110°C expansion drying equipment , to produce primary base cloth.

[0061] The water-bas...

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Abstract

The invention discloses waterborne impregnated resin, waterborne polyurethane superfine fiber synthetic leather and a preparation method of thewaterborne polyurethane superfine fiber synthetic leather. The waterborne impregnated resin is prepared from components in parts by weight as follows: 100 parts of a waterborne polyurethane emulsion, 5-30 parts of a water-soluble polymer, 0-100 parts of deionized water, 0.1-1 part of a wetting agent and 0-3 parts of a thickener. The preparation method of thewaterborne polyurethane superfine fiber synthetic leather comprises the following steps: sea-island non-woven fabric is impregnated in the waterborne impregnated resin and dried, and impregnated base cloth is obtained and fed into toluene for decrement; primary base cloth is obtained after washing and drying and is treated, and the waterborne polyurethane superfine fiber synthetic leather can be obtained. Environmental pollution is reduced greatly, part of soluble polymer granules are introduced, the release effect between fibers and resin is enhanced, and the obtained synthetic leather has a densercell structure.

Description

technical field [0001] The invention relates to polyurethane superfine fiber synthetic leather and a preparation method thereof. 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. [0003] 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 the O solution; 2) the sea phase in the fiber is extracted by hot toluene to obtain superfine fibers; 3) superfine fiber synthetic leather base cloth is made through drying, oiling, dyeing and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L29/04D06N3/00D06N3/14
CPCC08L75/04C08L2205/025C08L2205/03D06N3/0004D06N3/0011D06N3/0059D06N3/142D06N2211/28C08L29/04
Inventor 杜明兵张其斌杨银龙韩芹胡忠杰彭超豪
Owner HUAFON MICROFIBER SHANGHAI
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