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Transparent leather and manufacturing method thereof

A manufacturing method and leather technology, applied in special leather manufacturing, small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, etc. Breakage and other problems, to achieve simple operation, reduce pollution and production costs, the effect of small investment

Active Publication Date: 2018-12-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of leather is collagen. Collagen is a colorless to light yellow transparent or translucent material after drying. However, dried collagen is hard and brittle. It will break after being bent and cannot be processed into leather products. performance
However, after tanning, the leather becomes soft and resistant to twisting, but it is no longer transparent
So far, there is no published information disclosing transparent leather with good softness and its manufacturing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using delimed and softened cowhide as raw material, first use urea with 2.5% of the weight of the delimed and softened bare hide in an aqueous solution for swelling treatment for 1 hour, then dry the swollen bare hide, and then use the weight of the delimed and softened bare hide to swell for 1 hour. 100% of the transparent solution soaked in the dried swelling skin for 6 hours, the transparent solution is composed of 40% water, 10% ethylene glycol, 50% butanediol, 0.01% nano-silver with a particle size of 5nm and 0.01% n-butyraldehyde , and finally dry the bare leather treated with the transparent liquid to obtain transparent leather.

Embodiment 2

[0024] Using delimed and softened pigskin as raw material, first use hydrochloric acid with 0.3% weight of the delimed and softened skin to expand in an aqueous solution for 4 hours, then dry the expanded skin, and then use the delimed and softened skin to dry. The 200% transparent solution soaks the dried swelling skin for 1 hour. The transparent solution consists of 90% water, 10% diethylene glycol, 0.1% nano-silver with a particle size of 30nm and 0.03% tetrakis hydroxymethyl phosphorus sulfate. Finally, the bare leather treated with the transparent solution is dried to obtain transparent leather.

Embodiment 3

[0026] Using delimed and softened sheepskin as raw material, first use sodium hydroxide with a weight of 1.0% of the weight of the delimed and softened skin to expand in an aqueous solution for 0.5h, then dry the expanded skin, and then use the delimed and softened After soaking the skin with 50% of the weight of the transparent solution to treat the dried expanded skin for 1.5 hours, the transparent solution is composed of 40% water, 60% 1,2-propanediol, 0.05% nano-silver with a particle size of 25nm and 0.08% furfural , and finally dry the bare leather treated with the transparent liquid to obtain transparent leather.

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Abstract

The invention discloses transparent leather which is characterized by the light transmittance being 50-85%, the thickness being 0.5-1.5 mm, the softness being 4.0-8.0, the moisture content being 8-20%, and the shrinkage temperature being 50-70 DEG C. The transparent leather takes delimed and softened pelts as raw materials, the pelts are immersed in an aqueous solution for 0.5-4 h through an expansion agent with the mass accounting for 0.3-2.5% of the mass of the delimed and softened pelts, the expanded pelts are aired, then the aired pelts are immersed in a transparent liquid for 1-6 h, wherein the mass of the transparent liquid accounts for 50-200% of the mass of the delimed and softened pelts, the transparent liquid is composed of, by mass, 40-90% of water, 10-60% of polyhydric alcohols, 0.01-0.1% of nano-silver, and 0.01-0.1% of curing agent, and finally the leather treated by the transparent liquid is aired, and thus the transparent leather is obtained. The prepared transparent leather has the similar softness, fullness, flexural resistance and other sensory properties and service properties with traditional leather, but has the transparency which is not possessed by the traditional leather, and is a brand new type of leather. According to a transparent leather manufacturing method, materials in use have a wide source range, the manufacturing process is easy to operate, and practicality is high.

Description

technical field [0001] The invention belongs to the technical field of special leather and its production, and in particular relates to a soft transparent leather and a manufacturing method thereof. Background technique [0002] Leather is a collagen-based sheet material with certain softness, fullness, resistance to chemical and microbial degradation and usable performance, which is produced from various animal skins through a series of complex physical, chemical and mechanical processing processes. The main component of leather is collagen. Collagen is a colorless to light yellow transparent or translucent material after drying. However, dried collagen is hard and brittle. It will break after being bent and cannot be processed into leather products. performance. However, after tanning, the leather becomes soft and resistant to twisting, but it is no longer transparent. So far, there is no published information disclosing transparent leather with better softness and its m...

Claims

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Application Information

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IPC IPC(8): C14C13/00
CPCC14C13/00
Inventor 张金伟陈武勇
Owner SICHUAN UNIV
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