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Preparation method for polyurethane synthetic leather with water repellent performance

A technology of synthetic leather and polyurethane, which is applied to the surface coating liquid device, surface pretreatment, textiles and papermaking, etc. It can solve the problems of weak water repellency and achieve good dispersion and easy dispersion effect

Active Publication Date: 2012-08-29
ANHUI ANLI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the common artificial leather and synthetic leather in the existing market are not strong in water repellency and cannot meet the needs of the market.

Method used

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  • Preparation method for polyurethane synthetic leather with water repellent performance
  • Preparation method for polyurethane synthetic leather with water repellent performance

Examples

Experimental program
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Effect test

preparation example Construction

[0025] 2. Preparation of wet-process synthetic leather crust

[0026] Apply the wet-process polyurethane slurry prepared in step 1 to the base fabric and place it in a coagulation tank to solidify, then wash with water to obtain a wet-process synthetic leather semi-finished product, drain the wet-process synthetic leather semi-finished product and place it in a water-based water-repellent solution Moderate wetting, and finally segmental drying (drying to moisture content 0) after shaping, the wet synthetic leather crust is obtained; the segmental drying is mainly to avoid the problem of different moisture content in different parts of the crust, so that the obtained wet synthetic leather Different parts of the synthetic leather crust are dried to the same degree; in this embodiment, drying is divided into five stages, and the drying temperatures are respectively set at 140°C, 160°C, 160°C, 140°C and 80°C.

[0027] The water-based water-repellent solution consists of 100 parts ...

Embodiment 2

[0033] The preparation method of this example is the same as that of Example 1, except that the water-based water-repellent solution in step 2 consists of 100 parts by mass of deionized water, 25 parts of water-based defoamer SD-2025, and 100 parts of water-based water-repellent AD-HCS518.

[0034] The water repellency test results of the polyurethane synthetic leather prepared in this example are as follows: 3*20cm (weft*warp) crust leather sample is soaked in 25°C clear water solution for 8 hours, and the rise of the liquid level is ≤0.5cm.

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Abstract

The invention discloses a preparation method for polyurethane synthetic leather with a water repellent performance. A solvent type water repellent agent is added into a wet-process material for the synthetic leather, and a semi-finished product of the synthetic leather is subjected to water repellent treatment by a water-based water repellent agent in a processing process, so that high water repellent property of the synthetic leather is achieved. According to the preparation method, the 'siphon effect' of the synthetic leather can be effectively improved so as to increase the additional value of the synthetic leather.

Description

1. Technical field [0001] The invention relates to a method for preparing polyurethane synthetic leather, in particular to a method for preparing polyurethane synthetic leather with water repellency. 2. Background technology [0002] With the development of social economy, people's quality of life is improving day by day, and people's requirements for clothing, lodging and transportation are getting higher and higher, especially shoes, bags, sofas, etc. Air resistance, wear resistance and scratch resistance, soft texture, high elasticity, but also has excellent water repellency. However, common artificial leather and synthetic leather in the existing market have weak water repellency and cannot meet the needs of the market. 3. Contents of the invention [0003] The invention aims to provide a method for preparing polyurethane synthetic leather with water repellency, and the technical problem to be solved is to improve the water repellency of polyurethane synthetic leather...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/12B05D7/12B05D3/00
Inventor 姚和平王义峰王燕武徐晓庆黄万里李道鹏胡东卫惠坚强
Owner ANHUI ANLI MATERIAL TECH
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