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Method for producing aqueous polyurethane synthetic leather for costume by using physically-foamed pore forming coating technology

A technology of water-based polyurethane and physical foaming, which is applied in layered products, chemical instruments and methods, and synthetic resin layered products, etc. It can solve the problem of poor water vapor permeability and air permeability of synthetic leather, pollution of the environment, and the health of on-site operators. , product quality and grades are not high, to save the installation and recovery process, solve the problem of solvent pollution and residual problems, good hygienic performance

Inactive Publication Date: 2012-04-25
福建可利得皮革纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These organic solvents are extremely volatile during the production process, seriously polluting the environment and posing a threat to the health of on-site operators
Its three, adopt solvent-based polyurethane dry process film-transfer coating to make top layer, what obtain is the coating that closes, and this coating makes the water vapor permeable performance and air permeability of finished synthetic leather very poor, causes the sanitation of the synthetic leather of clothing. The performance is very poor, the product quality and grade are not high, and it is difficult to meet the performance requirements as a clothing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Preparation of water-based polyurethane foam slurry

[0022] 50 parts of soft water-soluble polyurethane with a solid content of 30%, 0.1 part of sodium dodecylbenzenesulfonate, 0.2 part of sodium lauryl sulfate, 0.15 part of potassium laurate, 0.3 part of hydrolyzed gelatin, 3 parts of higher alkanols with 8 to 31 carbon atoms and 0.2 parts of polyurethane thickener are mixed to obtain water-based polyurethane mixed slurry, and the water-based polyurethane mixed slurry is physically foamed by aeration and mechanical agitation of a mechanical foaming machine to obtain water-based polyurethane thickener. Polyurethane foam slurry;

[0023] 2) Dry film transfer of water-based polyurethane synthetic leather for clothing

[0024] First, 80 parts by mass of medium-hard water-based polyurethane with a solid content of 30%, 0.3 part of polyurethane thickener, 0.25 part of fluorine-modified hydroxyl-containing acrylic resin leveling agent and 5 parts of 8 to 31 carbon atom ...

Embodiment 2

[0032] 1) Preparation of water-based polyurethane foam slurry

[0033] In parts by mass, 70 parts of soft water-soluble polyurethane with a solid content of 30%, 0.2 part of sodium dodecylbenzenesulfonate, 0.15 part of sodium lauryl sulfate, 0.3 part of potassium laurate, 0.25 part of hydrolyzed gelatin, 5 parts of higher alkanol with 8 to 31 carbon atoms and 0.1 part of polyurethane thickener are mixed to obtain water-based polyurethane mixed slurry, and the water-based polyurethane mixed slurry is physically foamed by aeration and mechanical agitation of a mechanical foaming machine to obtain water-based polyurethane thickener. Polyurethane foam slurry;

[0034] 2) Dry film transfer of water-based polyurethane synthetic leather for clothing

[0035] First, 60 parts by mass of medium-hard water-based polyurethane with a solid content of 30%, 0.15 part of polyurethane thickener, 0.1 part of fluorine-modified hydroxyl-containing acrylic resin leveling agent and 3 parts of 8 to...

Embodiment 3

[0043] 1) Preparation of water-based polyurethane foam slurry

[0044] 60 parts of soft water-soluble polyurethane with a solid content of 30%, 0.15 part of sodium dodecylbenzenesulfonate, 0.3 part of sodium lauryl sulfate, 0.1 part of potassium laurate, 0.2 part of hydrolyzed gelatin, 2 parts of higher alkanols with 8 to 31 carbon atoms and 0.3 parts of polyurethane thickener are mixed to obtain water-based polyurethane mixed slurry, and the water-based polyurethane mixed slurry is physically foamed by aeration and mechanical agitation of a mechanical foaming machine to obtain water-based polyurethane thickener. Polyurethane foam slurry;

[0045] 2) Dry film transfer of water-based polyurethane synthetic leather for clothing

[0046] First, 70 parts by mass of medium-hard water-based polyurethane with a solid content of 30%, 0.2 part of polyurethane thickener, 0.3 part of fluorine-modified hydroxyl-containing acrylic resin leveling agent and 4 parts of 8 to 31 carbon atom H...

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Abstract

The invention relates to a method for producing aqueous polyurethane synthetic leather for costume by using a physically-foamed pore forming coating technology. According to the present invention, a physically-foamed polyurethane coating dry film transferring process replaces the original solvent-based polyurethane wet coagulation coating process, such that the problems of pollution and residue of the DMF solvent are solved; with adopting the aqueous polyurethane dry film transferring process to replace the solvent-based polyurethane dry film transferring process, the solvent pollution problem during the production process is eliminated; the synthetic leather for the costume is washed in hot water, the pore forming agent is lixiviated by the hot water, such that the penetrating pores are formed in the aqueous polyurethane coating of the synthetic leather, the water vapor permeability and the air permeability of the synthetic leather for the costume are improved, and the synthetic leather with the good-sanitary property is obtained; with the method, the DMF solvent recovery apparatus and the DMF solvent recovery process are saved, the production cost is reduced, and the technical process is simplified; when the conventional physical properties and the conventional mechanical properties are met, the water vapor permeability of the synthetic leather for the costume is more than or equal to 1.6 mg / cm<2>.h, and the air permeability of the synthetic leather for the costume is more than or equal to 2500 ml / cm<2>.h.

Description

technical field [0001] The invention relates to a production process of synthetic leather, in particular to a method for producing water-based polyurethane synthetic leather for clothing by utilizing a physical foaming pore-causing coating technology. 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, the non-woven fabric impregnated with high molecular polymer is used as the simulated mesh layer, and the microporous polyurethane layer is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have certain air permeability Artificial leather is closer to natural leather. Widely used in making shoes, boots, bags and ball games. According to the statistics of the National Bureau of Statistics on the output of 316 artificial leather and synthetic leather enterprises ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14B32B27/12B32B27/18B32B27/40B32B7/12B32B3/24
Inventor 施凌山马兴元牛建民张晓镭
Owner 福建可利得皮革纤维有限公司
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