Manufacturing method of ecological environment protection polyurethane superfine fiber synthetic leather

A technology of ultra-fine fiber and manufacturing method, applied in the field of synthetic leather manufacturing, can solve the problems of toluene residue, DMFDMF residue, hard hand feeling and the like

Inactive Publication Date: 2017-05-10
ZHEJIANG HEXIN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production process of traditional solvent-based microfiber synthetic leather is impregnated with solvent-based polyurethane resin. The solidification process includes impregnation of superfine fiber non-woven fabric with solvent-based polyurethane slurry, DMF aqueous solution coagulation bath, water washing, drying, toluene reduction, water washing, Drying and other steps, the production process uses a large amount of organic solvent N,N dimethylformamide (DMF), which will cause a large amount of DMF emissions and DMF residues in the product; in addition, the microfiber opening process requires the use of a large amount of hot toluene. Causes toluene emissions and toluene residues
In recent years, the use of water-based microfiber synthetic leather impregnated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) ZH-370-1.5 superfine fiber non-woven fabric unwinding, thickness 1.5mm, unit weight 370g / m 2 , door width 1.5 meters;

[0044] (2) The water-based slurry impregnated with soluble porogenic fillers, using three dipping and three-rolling processes, the water-based slurry includes the following components by weight:

[0045] Water-based polyurethane (DLU): 100 parts,

[0046] Water: 200 parts,

[0047] Color paste (BLPE-503): 20 parts,

[0048] Dissolvable porogenic filler (calcium carbonate): 60 parts,

[0049] Filler (barium sulfate): 20 parts,

[0050] Thickener (4456): 3 parts,

[0051] Wetting agent (BYK-349): 1 part,

[0052] Defoamer (BYK-028): 1 part;

[0053] (3) Enter a 120°C oven and dry for 5.5 minutes;

[0054] (4) impregnating the acetic acid treatment solution, the pH is 1, the impregnating time is 2min, and washing with water after drying;

[0055] (5) Immerse the superfine fiber synthetic leather in the above step at 90°C, reduce the weight in...

Embodiment 2

[0058] (1) ZH-320-1.2 superfine fiber non-woven fabric unwinding, thickness 1.2mm, unit weight 320g / m 2 , door width 1.5 meters;

[0059] (2) The water-based slurry impregnated with soluble porogenic fillers adopts three dipping and three-rolling processes, and the water-based slurry includes the following components by weight:

[0060] Water-based polyurethane (DLE): 100 parts,

[0061] Water: 100 parts,

[0062] Color paste (BLPE-503): 5 parts,

[0063] Color paste (BLPE-100): 5 parts,

[0064] Soluble porogenic filler (aluminum hydroxide): 30 parts,

[0065] Filler (calcium carbonate): 30 parts,

[0066] Thickener (4456): 3 parts,

[0067] Wetting agent (BYK-349): 2 parts,

[0068] Defoamer (BYK-028): 0.5 parts;

[0069] (3) Enter a 130°C oven and dry for 4.5 minutes;

[0070] (4) Immerse the superfine fiber synthetic leather in the previous step at 80° C., reduce the weight in 10% NaOH aqueous solution for 25 minutes, and wash it with water three times (without im...

Embodiment 3

[0073] (1) ZH-370-1.5 superfine fiber non-woven fabric unwinding, thickness 1.5mm, unit weight 370g / m 2 , door width 1.5 meters;

[0074] (2) The water-based slurry impregnated with soluble porogenic fillers adopts three dipping and three-rolling processes, and the water-based slurry includes the following components by weight:

[0075] Water-based polyurethane (DLU): 100 parts

[0076] Water: 0 parts

[0077] Color paste (BLPE-503): 5 parts

[0078] Soluble porogenic filler (polyvinyl alcohol powder): 10 parts

[0079] Filler: 0 parts

[0080] Thickener (4456): 2 parts

[0081] Wetting agent (BYK-349): 3 parts

[0082] Defoamer (BYK-028): 0 parts

[0083] (3) Enter a 130°C oven and dry for 4.5 minutes;

[0084] (4) Immerse the superfine fiber synthetic leather in the previous step at 80° C., reduce the weight in 10% NaOH aqueous solution for 25 minutes, and wash it with water three times;

[0085] (5) drying and winding to obtain the finished product of eco-friendly ...

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PUM

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Abstract

The invention relates to a manufacturing method of ecological environment protection polyurethane superfine fiber synthetic leather. The method comprises the following steps: (1) unwinding base fabric, wherein the base fabric is superfine fiber synthetic leather base fabric used for alkali decrement; (2) impregnating the base fabric into aqueous slurry containing dissoluble hole forming filler, wherein the aqueous slurry contains waterborne polyurethane and the dissoluble hole forming filler; (3) drying; (4) impregnating the dried product into an acid treatment solution, squeezing to dryness and then washing; (5) carrying out alkali decrement, and washing; (6) drying to obtain the finished product. The dissoluble hole forming filler can be dissolved by means of an acid treatment solution impregnation process or a direct hot alkali decrement process, so that a foam structure, which is obtained by wet solidification similar to solvent type polyurethane resin, is obtained from polyurethane resin; an organic solvent is not used in a production process, and methylbenzene is not used in the decrement process, so that ecological environment protection is realized in the production process, and the product is free from any dissolution residue; the product is soft, good in elasticity and strong in leather feeling.

Description

technical field [0001] The invention belongs to the field of synthetic leather manufacture, and relates to a method for manufacturing superfine fiber synthetic leather, and a method for manufacturing ecological and environment-friendly polyurethane superfine fiber synthetic leather. Background technique [0002] The production process of traditional solvent-based microfiber synthetic leather is impregnated with solvent-based polyurethane resin. The solidification process includes impregnation of superfine fiber non-woven fabric with solvent-based polyurethane slurry, DMF aqueous solution coagulation bath, water washing, drying, toluene reduction, water washing, Drying and other steps, the production process uses a large amount of organic solvent N,N dimethylformamide (DMF), which will cause a large amount of DMF emissions and DMF residues in the product; in addition, the microfiber opening process requires the use of a large amount of hot toluene. Causes toluene emissions an...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/14D06N3/0004D06N3/0043D06N3/0056D06N3/0088D06N2209/1635D06N2209/1642D06N2211/28
Inventor 周志军汪旗陈永张玉洲张晓峰戴丽
Owner ZHEJIANG HEXIN NEW MATERIAL CO LTD
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