Method for retanning leather by using bioenzyme

A biological enzyme and leather technology, applied in the application field of transglutaminase in leather retanning, can solve the problems of leather pollution and ecological environment pollution, and achieve good formability, improved thermal stability, and tight tissue Effect

Inactive Publication Date: 2011-07-20
SHENZHEN LEVEKING BIOLOGY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is the center of the world's leather industry. The processing and export volume of my country's leather industry ranks first in the world. However, the main problem that plagues the development of the leather industry is the serious pollution it produces. The main reason is that a large amount of leather is used in leather processing. Harmful leather chemicals that seriously pollute the ecological environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Retanning process parameters: liquor ratio 1:0.8, pH value about 5.0-6.0, temperature 30°C, rotating in the drum for 60 minutes;

[0023] Retanning agent composition: 0.5U / g leather dry weight transglutaminase, 1g / L JFC.

Embodiment 2

[0025] Retanning process parameters: bath ratio 1:0.9, pH value about 6.0-7.0, temperature 35°C, rotating in the drum for 60 minutes;

[0026] Retanning agent composition: 1U / g leather dry weight transglutaminase, 1g / L JFC.

Embodiment 3

[0028] Retanning process parameters: liquor ratio 1:0.6, pH value about 7.0-8.0, temperature 40°C, rotating in the drum for 60 minutes;

[0029] Retanning agent composition: 2U / g leather dry weight transglutaminase, 1g / L JFC.

[0030] The comparative example is a blue hide that has not been retanned.

[0031] The leathers processed in Examples 1, 2, and 3 all have better thermal stability, tear strength, and fullness, and the softness and tear strength of the leathers processed in Examples 2 and 3 are better. Example 2 has a certain economy because the amount of transglutaminase added is less, while the comparative example is the leather that has not taken the retanning step. The tear strength data is shown in Table 1, the thermal stability data is reflected in Table 1 by shrinkage temperature, and the fullness is a sensory parameter.

[0032]

[0033] Table 1 Comparison table of physical and chemical properties of leather

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PUM

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Abstract

The invention discloses a method for retanning leather by using bioenzyme, and in particular relates to reinforcement of a spatial structure of collagen by using the bioenzyme. The method is applied to a retanning process after a main tanning process. In the retanning process, transglutaminase is applied to the catalyzing of crosslinking in molecules and between the molecules of the collagen, so that physical and chemical indexes such as thermal stability, tear strength, fullness and the like of the leather are further improved. An application process comprises the following steps of: adding a certain amount of bioenzyme, namely 0.5 to 2U of bioenzyme, into every gram of dry blue leather which is tanned by the conventional process at the bath ratio of 1:0.6-1:0.9, the temperature of between 30 and 40 DEG C and the pH value of between 5.0 and 8.0; and treating in a revolving drum for 60 minutes. The tear strength, the fullness and the extensibility of the treated leather are correspondingly improved compared with those of untreated raw leather.

Description

technical field [0001] The invention relates to a method for retanning leather by using a biological enzyme preparation. The biological enzyme catalyzes the intramolecular and intermolecular reactions of collagen, thereby improving the physical and chemical properties of collagen, such as thermal stability, tear strength, and fullness. Application of transglutaminase in leather retanning. Background technique [0002] my country is the center of the world's leather industry. The processing and export volume of my country's leather industry ranks first in the world. However, the main problem that plagues the development of the leather industry is the serious pollution it produces. The main reason is that a large amount of leather is used in leather processing. Harmful leather chemicals seriously pollute the ecological environment. Therefore, applying biodegradable and environmentally friendly biological products to leather processing is the focus of domestic and foreign colle...

Claims

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Application Information

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IPC IPC(8): C14C3/08
Inventor 曹勇邓宇贾佳张娜王芬卢雪峰刘胜伟
Owner SHENZHEN LEVEKING BIOLOGY ENG
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