Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of novel leather retanning method

A leather and tanning agent technology, which is applied in the field of new leather retanning, can solve the problems of long process, large sewage discharge, complicated leather process, etc., and achieve the effect of short time period, less sewage discharge and less process flow

Inactive Publication Date: 2014-10-29
郑州科信化工有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new leather retanning method, improve the firmness, fullness and softness of leather, and solve the problems of cumbersome leather technology, long process and large sewage discharge.

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

[0019] The novel leather retanning method of the present embodiment comprises the following steps:

[0020] 1) Take 100kg of wet blue hides and put them into the drum;

[0021] 2) Water washing: add 200kg of water at 40°C, 0.3kg of fatty acid glyceride, and rotate at 16rpm for 60min;

[0022] 3) Neutralization: Add 150kg of water at 35°C, 0.8kg of dye, rotate at 16rpm for 10min, add 2kg of aliphatic aldehyde, rotate at 16rpm for 30min, add 2kg of phenol syntan, rotate at 16rpm for 60min, make the pH value 4.8 ;

[0023] 4) Tanning: Add 50kg of water at 30°C, 2.5kg of dye, rotate at 16rpm for 30min, add 80kg of water at 50°C, 8kg of dicyandiamide resin tanning agent, rotate at 16rpm for 60min, add 1.5kg of formic acid, rotate at 16rpm 30min;

[0024] 5) Wash the skin with water at 20°C.

Embodiment 2

[0026] The novel leather retanning method of the present embodiment comprises the following steps:

[0027] 1) Take 100kg of wet blue hides and put them into the drum;

[0028] 2) Water washing: add 250kg of water at 40°C, 0.2kg of fatty acid glyceride, and rotate at 12rpm for 60min;

[0029] 3) Neutralization: Add 130kg of water at 35°C, 1kg of dye, rotate at 12rpm for 10min, add 2kg of aliphatic aldehyde, rotate at 12rpm for 30min, add 2.5kg of phenol syntan, rotate at 12rpm for 60min, make the pH value 5.0 ;

[0030] 4) Tanning: add 50kg of water at 30°C, 2kg of dye, rotate at 12rpm for 30min, add 80kg of water at 50°C, 10kg of melamine syntan, rotate at 12rpm for 60min, add 2kg of formic acid, and rotate at 12rpm for 30min;

[0031] 5) Wash with water at 25°C to remove the skin.

Embodiment 3

[0033] The novel leather retanning method of the present embodiment comprises the following steps:

[0034] 1) Take 100kg of wet blue hides and put them into the drum;

[0035] 2) Water washing: add 300kg of water at 40°C, 0.25kg of fatty acid glyceride, and rotate at 14rpm for 60min;

[0036] 3) Neutralization: Add 100kg of water at 35°C, 0.9kg of dye, rotate at 14rpm for 10min, add 2kg of aliphatic aldehyde, rotate at 14rpm for 30min, add 2.2kg of phenol syntan, rotate at 14rpm for 60min, make the pH value 4.9;

[0037] 4) Tanning: add 50kg of water at 30°C, 2.3kg of dye, rotate at 14rpm for 30min, add 80kg of water at 50°C, 9kg of naphthalene-based syntan, rotate at 14rpm for 60min, add 1.7kg of formic acid, and rotate at 14rpm for 30min ;

[0038] 5) Wash the skin at 22°C.

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 novel leather retanning method, which comprises the following steps: 1) taking wet blue leather into a drum; 2) washing, adding water at 40 DEG C and degreasant to be rotated for 60 minutes; 3) neutralizing, adding water at 35 DEG C and dye to be rotated for 10 minutes, adding fatty aldehyde to be rotated for 30 minutes, and adding a neutralizer to be rotated for 60 minutes, so that the pH value is 4.8-5.0; 4) tanning, adding water at 30 DEG C and dye to be rotated for 30 minutes, adding water at 50 DEG C, adding a leather retanning agent to be rotated for 60 minutes, and adding formic acid to be rotated for 30 minutes, and 5) washing and discharging leather at 20-25 DEG C. According to the novel leather retanning method disclosed by the invention, the compactness, the fullness and the softness of the leather are improved; light, thin and soft requirements of a leather product are accorded, and the retanning method disclosed by the invention is simple in process, short in time cycle, fewer in technological processes, and less in sewage discharge, and has economic benefit and environmental benefit.

Description

technical field [0001] The invention belongs to the technical field of leather tanning, and in particular relates to a novel leather retanning method. Background technique [0002] Tanning is the physical and chemical process of turning raw hide into leather through tanning agents, and is an important process in leather and fur making. Tanning is generally carried out in a drum, through the mechanical action of the drum, the uniform penetration of various chemical materials is promoted, and the chemical action between the preparation and the hide is completed. The role of tanning is to increase the porosity of the fiber structure, improve the moisture and heat resistance of collagen fibers, improve the chemical resistance of collagen and the resistance to microorganisms and enzymes, reduce the adhesion between collagen fiber bundles, fibers, and fibrils, and reduce The deformation of wet leather reduces the shrinkage of wet leather during drying, reduces the regularity of t...

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 Patents(China)
IPC IPC(8): C14C3/08C14C3/10C14C3/14C14C9/02
Inventor 李新华
Owner 郑州科信化工有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com