Sheep leather acid swelling treatment method

A technology of sheep skin and acid expansion, which is applied in chemical treatment before tanning, small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, etc., which can solve the problem of impossible production of high The quality of thin, light and soft sheep fur, stiff hand feeling, and large damage to the wool cover have achieved the effect of a good industrial production base, good matching, and soft hand feeling.

Active Publication Date: 2013-04-24
SICHUAN UNIV +1
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fur cannot be subjected to alkali expansion, because the use of alkali expansion will cause a large area of ​​hair loss
On the other hand, alkali can cause great damage to the wool cover. The main component of sheep wool is keratin, and alkali can hydrolyze keratin, which will reduce the strength and warmth retention of wool
The second is enzymatic softening, which weakens the role of elastic fibers and arrector pili muscles in the skin tissue structure, and separates loose collagen fibers, but the controllability is poor. If t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Acid swelling process: Standardized water-soaked and degreased sheepskin is placed in a scoring groove, and the weight is 100 parts; the temperature is normal temperature, add 1000 parts of water, add 2 parts of formic acid, paddle for 30 minutes, and then paddle 10min, stop for 50min, stroke for 10min, stop for 50min, stroke for 10min, stop for 50min, stroke for 10min, stop for 50min, stand overnight, the total acid expansion time is 18h;

[0017] (2) De-expansion process: put the acid-expanded sheepskin in the groove, and the weight of the sheepskin after soaking in water and degreasing is 100 parts; the temperature is normal temperature, add 1000 parts of water, add 2 parts of sodium acetate, and add chlorine 20 parts of sodium chloride, stroke for 30 minutes, then stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stand overnight, and contr...

Embodiment 2

[0019] (1) Acid swelling process: Standardized water-soaked and degreased sheepskin is placed in a scoring groove, and the weight is 100 parts; the temperature is normal temperature, add 1500 parts of water, add 6 parts of acetic acid, paddle for 40 minutes, and then paddle 10min, stop for 50min, stroke for 10min, stop for 50min, stroke for 10min, stop for 50min, stroke for 10min, stop for 50min, stand overnight, the total acid expansion time is 24h;

[0020] (2) De-expansion process: put the acid-expanded sheepskin in the groove, and the weight of the sheepskin after soaking and degreasing is 100 parts; the temperature is normal temperature, add 1500 parts of water, add 6 parts of sodium formate, add chloride Sodium 80 parts, stroke for 40 minutes, then stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stand overnight, and control the deswelling time at...

Embodiment 3

[0022] (1) Acid swelling process: Standardized water-soaked and degreased sheepskin is placed in a scoring groove, and the weight is 100 parts; the temperature is normal temperature, 2500 parts of water are added, 8 parts of citric acid are added, and the padding is done for 60 minutes. Move for 10 minutes, stop for 50 minutes, move for 10 minutes, stop for 50 minutes, move for 10 minutes, stop for 50 minutes, move for 10 minutes, stop for 50 minutes, stand overnight, and the total acid swelling time is 36 hours;

[0023] (2) De-expansion process: put the acid-expanded sheepskin in the groove, and the weight of the sheepskin after soaking and degreasing is 100 parts; the temperature is normal temperature, add 2500 parts of water, add 8 parts of sodium citrate, and add 150 parts of sodium chloride, stroke for 60 minutes, then stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, stop for 50 minutes, stroke for 10 minutes, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a sheep leather acid swelling treatment method. The method comprises a step of acid swelling and a step of de-swelling, wherein the acid swelling is carried out in an acidic swelling liquid, and the swelling is uniform and appropriate without hair dropping or excess leather loss; and the de-swelling is carried out in a de-swelling liquid, the de-swelling effect is very good, and a state before swelling can be completely recovered. Collagen fibers can be effectively loosened and elastic fibers and muscle tissues are digested to a certain degree through the acid swelling treatment. Compared with fur prepared through routine methods, fur prepared through the method disclosed in the invention has the advantages of obviously improved softness and fullness, elasticity, nearly 3-time improvement of the tensile strength, 20% reduction of the unit mass, obviously improved shrinkage temperature, and elimination of the sheep fur layering phenomenon. All the performance indexes of finished sheep fur accord with the Light Industry Standard of the PRC (QB/T1280-1991), and the finished sheep fur also has the characteristics of thinness, lightness, and softness.

Description

technical field [0001] The invention belongs to the field of fur inventions. Background technique [0002] Sheep fur has good warmth retention and practicality, and is widely used as coat liner, seat cushion, winter hat lining, and fur coat, etc. Especially after special processing, it can be imitated into other valuable furs, but the price is relatively low, and it is widely loved by the public. With the improvement of people's consumption level and the continuous development of the fur industry, people's requirements for sheep fur are not limited to warmth and cold protection, but more attention is paid to wearing comfort and functionality, such as the lightness, softness, lightness and natural warmth of fur. Fur products that are good but very heavy, inconvenient to carry, or have no special function are no longer popular. (See Liu Lan, Populus euphratica, Dan Weihua, etc., The Functional Effects of Leather and Fur, "China Leather", 2012, 41 (5): 44) Compared with the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C14C1/08
Inventor 但卫华刘萌王建宇但年华王祎刘付江
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap