Animal hide fiber loosening method based on xylanase effect

A technology of animal skin fiber and xylanase, applied in the field of leather or fur leather processing, can solve the problems of fiber looseness, achieve the effects of reducing pollution, excellent physical and mechanical properties, and reducing the difficulty of processing

Active Publication Date: 2017-11-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a new method of fiber loosening for the deficiencies of the existing fiber loosening technology, to reduce the pollution of lime and sulfurized alkali in the traditional liming process, and to make u

Method used

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  • Animal hide fiber loosening method based on xylanase effect
  • Animal hide fiber loosening method based on xylanase effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1—yellow cow sofa leather soaked in water

[0043] 100kg of wet salted hide of yellow cattle, after washing, pre-soaking and removing meat, add to the drum, add 200kg of water, adjust the temperature to about 22°C, add 0.1kg of xylanase (Kunming Aikete Biotechnology Co., Ltd.), and turn 60 Minutes later, add 0.5kg of soda ash, 0.2kg of osmotic agent JFC, and 0.2kg of bactericide, and rotate for 60 minutes, intermittently, 5 minutes per hour, and the total immersion time is about 22 hours.

[0044] The results of proteoglycans and total sugars in the waste liquid after soaking in water are shown in Table 1. The proteoglycans and total sugars removed in the yellow cowhide soaked with xylanase were significantly higher than those in the blank group. The experimental results showed that the fiber loosening degree of the group added with xylanase was better.

[0045] Table 1 Proteoglycan and total sugar content in soaking wastewater (mg / L)

[0046]

Embodiment 2

[0047] Embodiment 2—cowhide upper leather depilation

[0048] Add 100kg of cowhide soaked in water to the drum, add 50kg of water, adjust the temperature to about 25°C, adjust the pH value of the hide to 6-7, and add 0.1kg of xylanase (Shandong Longkete Enzyme Preparation Co., Ltd.), after 4 hours of rotation , add 0.15 kg of 1398 protease, rotate for 3 hours, until only small hairs are left, add 1 kg of lime, rotate for 40 minutes, add 0.5 kg of sodium sulfide, rotate for 40 minutes, add expansion agent CAS (Sichuan Dawei Technology Co., Ltd.) 0.25 kg after hair removal , water 30kg, turn for 20min and stop for 20min, add CAS 0.25kg, water 25kg, turn for 20min and stop for 20min, add water 50kg, turn for 30min and stop the drum overnight. After the delimed bare leather is peeled and delimed, it does not need to be softened by enzymes, and directly enters the pickling process, and then proceeds according to the conventional shoe upper leather process.

[0049] The properties ...

Embodiment 3

[0053] Example 3 - softening of pigskin garment leather

[0054] According to the conventional process, 100kg of naked pig hides are added to the drum after liming and peeling. After deliming, add 40kg of water, adjust the temperature to 35°C, add softening enzyme DOWELLZYMBM (protease, Sichuan Dawei Technology Co., Ltd.) 1.5kg and wood poly Carbohydrase (Shandong Longkete Enzyme Preparation Co., Ltd.) 0.05kg, rotate for 90 minutes, then intermittently rotate for 5 minutes every 30 minutes, for a total of 4 hours.

[0055] The skins treated above are then subjected to follow-up operations according to the conventional process.

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Abstract

The invention discloses an animal hide fiber loosening method based on the xylanase effect and relates to the field of production of leather and fur leather. The method is characterized in that xylanase is added as a hide fiber loosening additive during the steps such as water soaking, depilation, softening and pickling of leather making or during the steps such as water soaking, softening and pickling of fur leather making. By means of the method, the components such as proteoglycan and glycosaminoglycan, which have a cohesive effect on hide fiber, in the animal hide can be efficiently and specifically destroyed. Hide protein ingredients cannot be destructed. The method has wide applicability and is suitable for the manufacturing process of all-purpose leather or fur leather with various kinds of animal hides as raw materials. The effects of promoting loosening of hide fiber and improving the softness, hand feeling and physical and mechanical properties of finished leather products are achieved. Through the method in the leather making process, pollutants such as lime and sodium sulfide are reduced, and the depilation effect is improved.

Description

technical field [0001] The invention relates to the field of processing leather or fur with animal skin as raw material, in particular to a method for loosening animal skin fibers by using xylanase. Background technique [0002] Proper loosening of hide fibers is one of the main purposes of the tanning and fur preparation section. The looseness of animal skin fibers directly affects the penetration of materials in the subsequent process and the combination with active groups on collagen fibers, which in turn affects the softness, fullness, elasticity, grain state, physical and mechanical properties and area of ​​the finished leather. rate etc. Especially in the production of soft leather, the degree of fiber looseness directly determines the quality and grade of the finished leather. [0003] Tanning production mainly utilizes the dermis of animal skin, especially the collagen component, and other non-collagen components such as fibrous matrix, fat, blood stains, etc. need...

Claims

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Application Information

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IPC IPC(8): C14C1/06C14C1/08
CPCC14C1/065C14C1/08
Inventor 彭必雨罗凤香田永鑫李艳红张旭
Owner SICHUAN UNIV
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