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Production method for waterborne polyurethane synthetic leather wet process impregnated bass

A technology of water-based polyurethane and production method, which is applied in textiles, papermaking, fiber treatment, etc., can solve the problems of DMF pollution, product safety, etc., achieve good physical and mechanical properties, and save the effect of DMF recycling process

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

[0008] The object of the present invention is to provide a kind of production method of water-based polyurethane synthetic leather wet impregnation bass, to solve the DMF pollution problem that produces in the current solvent type polyurethane synthetic leather wet impregnation bass production and the product that the residue of DMF in the synthetic leather product causes safe question

Method used

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  • Production method for waterborne polyurethane synthetic leather wet process impregnated bass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of dipping solution:

[0026] According to the number of parts by mass, 10 parts of anionic water-based polyurethane whose solid content is 30% of the hydrophilic group is a carboxylate group, 8 parts of light calcium carbonate with a particle diameter greater than 400 mesh, and 20 parts of water are uniformly mixed to obtain an impregnation solution;

[0027] 2) Preparation of coagulation solution:

[0028] 5 parts of demulsification cross-linking agent aluminum sulfate and 80 parts of water are mixed and stirred sequentially in parts by mass to dissolve the demulsification cross-linking agent to obtain coagulation solution;

[0029] 3) Production of water-based polyurethane synthetic leather wet impregnated bass:

[0030] First, the non-woven fabric is passed through the impregnation tank, soaked with an impregnation solution at a temperature of 20°C, and then passed through a pair of rolls to squeeze out part of the impregnation solution in the non-wo...

Embodiment 2

[0034] 1) Preparation of dipping solution:

[0035] According to the number of parts by mass, 50 parts of anionic water-based polyurethane with a solid content of 30% of the hydrophilic group being a sulfonate group, 12 parts of wood flour with a particle diameter greater than 400 mesh, and 45 parts of water were uniformly mixed to obtain an impregnation solution;

[0036] 2) Preparation of coagulation solution:

[0037] Mix and stir the mixture of 10 parts of demulsification cross-linking agent aluminum sulfate and aluminum potassium sulfate dodecahydrate and 88 parts of water successively by mass parts to dissolve the demulsification cross-linking agent to obtain coagulation solution;

[0038] 3) Production of water-based polyurethane synthetic leather wet impregnated bass:

[0039] First, pass the nonwoven fabric through the impregnation tank, soak it with the impregnating solution at a temperature of 30°C, and then pass through a pair of rolls to squeeze out part of the i...

Embodiment 3

[0043] 1) Preparation of dipping solution:

[0044] 30 parts of anionic water-based polyurethane whose solid content is 30% of the hydrophilic group is carboxylate, 10 parts of diatomite with a particle diameter greater than 400 mesh, and 30 parts of water are uniformly mixed to obtain an impregnation solution in parts by mass;

[0045] 2) Preparation of coagulation solution:

[0046] 8 parts of demulsification cross-linking agent potassium aluminum sulfate dodecahydrate, the mixture of aluminum chloride and basic aluminum formate and 90 parts of water are mixed and stirred successively in parts by mass to dissolve the demulsification cross-linking agent to obtain the coagulation liquid;

[0047] 3) Production of water-based polyurethane synthetic leather wet impregnated bass:

[0048] First, pass the nonwoven fabric through the dipping tank, soak it with the impregnating solution at a temperature of 40°C, and then pass through a pair of rolls to squeeze out part of the impre...

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Abstract

The invention provides a production method for waterborne polyurethane synthetic leather wet process impregnated bass, comprising the following steps of: preparing impregnation liquid by using waterborne polyurethane, filler and water; preparing solidification liquid by mixing a demulsification cross-linking agent with water; saturating a non-woven fabric by the impregnation liquid through an impregnation groove, and extruding some impregnation liquid in the non-woven fabric by a pair of rollers; enabling the non-woven fabric with the impregnation liquid to pass through a solidification groove filled with a coagulating agent to form porous filler by the waterborne polyurethane coagulated by the coagulating agent and the filler, and filling the filler in the non-woven fabric; and washing by water, extruding water and drying to obtain the waterborne polyurethane synthetic leather wet process impregnated bass. The product produced by the invention has the extremely similar microcellular structure, and is better in physical and mechanical properties, water vapor penetration performance, and hand feel characteristic. According to the production method, the solvent pollution problem of DMF (dimethyl formamide) and the product safety problem caused by the residue of the DMF in the production of solvent type polyurethane wet process impregnated bass can be solved.

Description

technical field [0001] The invention relates to the technical field of polyurethane synthetic leather, in particular to a production method of water-based polyurethane synthetic leather wet impregnated bass. Background technique [0002] Synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. Usually non-woven fabric is used to simulate the mesh layer, and microporous polyurethane coating is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. Widely used in making shoes, boots, bags and ball games. [0003] According to the data of the National Bureau of Statistics, in 2011, there were 495 artificial leather and synthetic leather enterprises above designated size (new classification standard: ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06M15/564
Inventor 施凌山马兴元牛建民张晓镭
Owner FUJIAN KELIDA SYNTHETIC FIBER
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