Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving leather softness synergistically by using acid proteinase

An acid protease, softness technology, applied in application, leather impregnation, leather surface treatment, etc., can solve the problems of no synergistic effect of enzyme treatment auxiliaries, no report on enzyme application research, etc., to achieve sustainable development. , Improve the softness, the effect of being conducive to environmental protection

Inactive Publication Date: 2015-09-30
SICHUAN UNIV
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research work is mainly on the treatment of chrome tanned leather (blue leather), and there is no research report on the synergistic effect of enzyme treatment and silicone oil additives. There is no report on the application research of the enzyme

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

[0018] A method for synergistically improving leather softness by applying acid protease, comprising the following steps:

[0019] (1) Weighing: chrome-tanned sheep leather (blue leather) is weighed as a benchmark for subsequent operations.

[0020] (2) Add water in the drum according to the liquid ratio of 1.5, adjust the pH value to 5.0, and the temperature is 40°C, put in chrome tanned leather, transfer to the drum, and fully rehydrate.

[0021] (3) Add 6% acid protease and 6% amino silicone oil, and rotate for 6 h.

[0022] (4) Formic acid fixation: adjust the pH to 4.0~4.5 with formic acid, remove the drum, and ride the horse.

Embodiment 2

[0024] A method for synergistically improving leather softness by applying acid protease, comprising the following steps:

[0025] (1) Weighing: chrome-tanned sheep leather (blue leather) is weighed as a benchmark for subsequent operations.

[0026] (2) Add water in the drum according to the liquid ratio of 1.5, adjust the pH value to 5.0, and the temperature is 40°C, put in chrome tanned leather, transfer to the drum, and fully rehydrate.

[0027] (3) Add 6% acid protease and 6% polyether silicone oil, and rotate for 6 h.

[0028] (4) Formic acid fixation: adjust the pH to 4.0~4.5 with formic acid, remove the drum, and ride the horse.

Embodiment 3

[0030] A method for synergistically improving leather softness by applying acid protease, comprising the following steps:

[0031] (1) Weighing: Zirconium-aluminum-titanium chrome-free multi-metal tanned sheep leather is weighed as a benchmark for subsequent operations.

[0032] (2) Add water in the drum according to the liquid ratio of 1.5, adjust the pH value to 5.0, and the temperature is 40°C, put in chrome tanned leather, transfer to the drum, and fully rehydrate.

[0033] (3) Add 6% acid protease and 6% amino silicone oil, and rotate for 6 h.

[0034] (4) Formic acid fixation: adjust the pH to 4.0~4.5 with formic acid, remove the drum, and ride the horse.

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 method for improving leather softness synergistically by using acid proteinase and an organic silicone oil auxiliary and belongs to the technical field of leather cleaning. The method is characterized in that the method can be applied to after-tanning wet-processing procedure for chrome tanned leather, particularly free-chrome tanned leather; the softness and the elongation rate at break of the leather can be increased effectively; besides, leather fiber is excellent in dispersion uniformity and feels comfortable; and the shrinkage temperature and the mechanical strength of the leather are reduced to some extent, however, the reducing extent is low. The method comprises the steps as follows: after crust leather is obtained through a tanning technology, the crust leather is processed for 3-6 hours by using 3%-6% (based on the quality of the crust leather) of the acid proteinase and 3%-10% (based on the quality of the crust leather) of the organic silicone oil auxiliary under the condition that the liquor ratio is 1.5-2.0, the temperature is 40-45 DEG C and the pH value is 4.0-5.0; and later the pH value is adjusted to 4.0-4.5 by using formic acid, and fixation is carried out. The softness of the leather is improved remarkably.

Description

technical field [0001] The invention relates to a method for synergistically improving leather softness by applying acid protease, which belongs to the technical field of tanning cleaning. In the method of the present invention, the acid protease promotes fiber dispersion by moderately hydrolyzing the leather collagen fibers, and at the same time, the silicone oil auxiliary agent penetrates into the surface of the leather collagen fibers to play a lubricating effect, thereby improving the softness, elongation at break and uniform fiber dispersion of the leather sex and hand comfort. Background technique [0002] The increasingly serious environmental problems have led to the rapid development of tanning clean production technology. The traditional chrome tanning process has a low absorption rate of chrome tanning agent and high chromium content in the waste liquid, which prompts the emergence of clean technologies such as non-pickling chrome tanning technology and high pH v...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C14C11/00C14C9/00
CPCC14C11/00C14C9/00C14C11/003
Inventor 李正军孙国龙杜卫宁
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com