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Waterborne polyurethane resin and application thereof in waterborne micropore coating leather of split leather

A technology of water-based polyurethane and split skin, applied in the chemical industry, can solve problems such as poor appearance, achieve good hand feeling, reduce costs, and achieve remarkable results

Inactive Publication Date: 2014-12-10
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the split skin product obtained by this method has the following problems. On the skin of the animal, there are many uneven shapes caused by wrinkles, blood vessel marks, etc. depending on the part. The above-mentioned grain-like split skin product exists in The problem that the appearance deteriorates due to the uneven shape caused by such wrinkles and blood vessel marks in the stretched state

Method used

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  • Waterborne polyurethane resin and application thereof in waterborne micropore coating leather of split leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A split leather with a thickness of 2 mm made of cowhide is coated with water-based polyurethane adhesive resin by roller coating to form an adhesive layer. 100 parts of water-based anionic polyurethane slurry (the company's FU-2315 is selected, and the 100% tensile strength of the dry film is 30kg / cm 3 , with a solid content of 40%), 3 parts of sodium sulfosuccinate, 3 parts of ammonium stearate, 2 parts of polyisocyanate crosslinking agent, 1 part of polyurethane associative thickener PU40W, stir for 1 hour with a high-speed mixer, and mix well , to obtain a foamed resin. The foamed material was applied to the treated split skin by roller coating to a wet thickness of 0.5 mm. After being dried in a drying oven, the split leather is obtained.

Embodiment 2

[0031] A split leather with a thickness of 1.8 mm made of cowhide is coated with water-based polyurethane adhesive resin by roller coating to form an adhesive layer. 100 parts of water-based anionic polyurethane slurry (the company's FU-2305 is selected, and the 100% tensile strength of the dry film is 50kg / cm 3 , with a solid content of 42%), 2 parts of sodium sulfosuccinate, 4 parts of ammonium stearate, 6 parts of melamine-formaldehyde resin, 1.2 parts of polyurethane associative thickener PU40W, stir with a high-speed mixer for 1.5h, fully Mix well to obtain a foamed resin. The foamed material was applied to the treated split skin by roller coating to a wet thickness of 0.7 mm. After being dried in a drying oven, the split leather is obtained.

Embodiment 3

[0033] A split skin made of pigskin with a thickness of 3 mm is coated with water-based polyurethane adhesive resin by roller coating to obtain an adhesive layer. 100 parts of water-based anionic polyurethane slurry (the company's FU-2305 is selected, and the 100% tensile strength of the dry film is 50kg / cm 3 , with a solid content of 42%), 4 parts of sodium sulfosuccinate, 3 parts of ammonium stearate, 3 parts of polyisocyanate cross-linking agent, 1.5 parts of polyurethane associative thickener PU40W, stir with a high-speed mixer for 1 hour, fully Mix well to obtain a foamed resin. The foamed material was applied to the treated split skin by roller coating to a wet thickness of 0.6 mm. After being dried in a drying oven, the split leather is obtained.

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Abstract

The invention provides a waterborne polyurethane foam resin and application of the waterborne polyurethane foam resin. A polyurethane film in the split leather prepared through a resin method of the invention contains a large quantity of micropore structures with different sizes, so that better hand feeling, moisture permeation and air permeability performances, elasticity of compression and sanitation performance are achieved, and the effect of imitating a top layer leather is remarkable. A leather product prepared from the split leather does not contain a solvent, so that the harm of the solvent to a human body is eliminated; the whole production process does not emit hazardous gases, thereby satisfying the environmental requirements; waste of the solvent is avoided, the investment on solvent recovery equipment is reduced, the cost is lowered, and the energy sources are saved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a water-based polyurethane resin and its application in split skin water-based microporous coated leather. Background technique [0002] The skin structure of mammals and other animals is formed by the epidermis and dermis with different organizational structures. The hide obtained from the animal is dehaired to remove the epidermis to obtain the dermis, which contains criss-cross collagen fibers, which help to maintain the high physical strength of the leather. [0003] The dermis can be divided into the papillary layer on the superficial side and the reticular layer on the inner side according to its organizational structure. The papillae include a surface called the grain, which has an inherent animal pattern of relief and a smooth, graceful appearance. The upper surface layer from the nipple layer to the upper part of the reticular layer is cut, tanned, dyed, etc., a...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08J9/00D06N3/14B32B27/06B32B37/02
Inventor 刘娅林黄凯孙海园马金明闫克辉陈建栋范世杰王铁森于福哲郑萍
Owner SHANDONG TIANQING TECH DEV
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