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A method for improving the performance of organic chrome-free tanned leather

A chrome-free tanning and performance technology, applied in the field of leather processing, can solve the problems of poor color fastness and physical sensory properties, lower shrinkage temperature of raw leather, unsatisfactory absorption and bonding of dyeing and finishing materials, etc. The effect of reducing usage and improving color fastness

Active Publication Date: 2022-03-18
CHINA LEATHER & FOOTWEAR IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the production of bio-based aldehyde tanned leather based on conventional dyeing and finishing technology, which inevitably leads to unsatisfactory absorption and combination of dyeing and finishing materials, lower shrinkage temperature of crust leather, poor color fastness and physical sensory properties problem, providing a method to improve the properties of organic chrome-free tanned leather

Method used

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  • A method for improving the performance of organic chrome-free tanned leather
  • A method for improving the performance of organic chrome-free tanned leather

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Effect test

Embodiment 1

[0034] This embodiment is used to illustrate the overall steps of the manufacturing method of high-performance leather, specifically including:

[0035] After the bio-based aldehyde tanned leather is shaved and remoisturized, conventional retanning agents, bio-based amino resin retanning agents, functional dyes and fatliquoring agents are added for reaction; specifically: the bio-based aldehyde tanned leather is squeezed, Shave to obtain smooth leather, and weigh it as the material standard for subsequent materials; first, rehydrate according to the conventional process, then put the rewetted shaved leather into the drum, add water 100% of the weight of the shaved leather, Keep the temperature inside the drum at 35°C, add 3%~10% of conventional retanning agent, 1%~3% of bio-based amino resin retanning agent and 2%~30% of For functional dyes, the total rotation time is 2.5~3.5 hours, then add formic acid with 1.0%~1.5% of the weight of the smoothed leather into the drum, add in...

Embodiment 2-9

[0039] Embodiment 2-9: to illustrate the specific manufacturing method of high-performance leather:

Embodiment 2

[0041] A method for improving the properties of organic chrome-free tanned leather:

[0042] (1) Squeeze and shave the dialdehyde methyl glucoside tanned leather to obtain a shaved leather, and weigh it as the material standard for subsequent materials; first, rewet according to the conventional process, and then rewet the shaved leather Put the leather into the drum, add water with 100% of the weight of the shaved leather, keep the temperature in the drum at 35°C, add macromolecular acrylic resin retanning agent A33 of 1% of the weight of the shaved leather, and 2% of Small and medium molecule acrylic resin retanning agent RF15, 3% protein filler TJ-950, 1% dialdehyde sodium alginate-melamine resin retanning agent, 4% wattle extract TJ-R228 and 2% reactive red 180, the total rotation time is 2.5 hours, then add formic acid with a weight of 1.0%~1.5% of the shaved leather into the drum, add in portions, adjust the pH of the bath solution to 4.0~4.2, and then continue to rotate...

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Abstract

The invention belongs to the technical field of leather processing and discloses a method for improving the performance of organic chrome-free tanned leather. The invention can effectively improve the color fastness, shrinkage temperature and physical sensory properties of finished leather through the organic synergy of tanning agents, dyeing and finishing materials and processes, and produce high-performance leather. The invention does not use formaldehyde-containing and chromium-containing leather chemical materials in the whole production process. Therefore, compared with the existing leather production technology based on chrome tanning, the present invention can completely eliminate chrome pollution, has a higher degree of cleaning, and is more friendly to the environment; Compared with the traditional leather production method, the leather produced by it does not contain formaldehyde and chromium, and its physical properties are obviously better, so it has higher market application value.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a method for improving the performance of organic chrome-free tanned leather. Background technique [0002] The production of leather mainly includes the preparation section, tanning section and finishing section. Among them, the main purpose of the preparation section is to remove the useless things in tanning, and at the same time loosen the collagen fibers to lay the foundation for tanning; The leather under the action of microorganisms also endows the leather with certain mechanical processing properties such as flaking and grinding; the finishing process has a crucial impact on the quality, performance and style of the final leather product. At present, chrome tanning is still the most important method of leather tanning, but the pollution of chromium-containing wastewater and solid waste has seriously restricted the sustainable development of the leather industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/16C14C3/22
CPCC14C3/16C14C3/22
Inventor 丁伟庞晓燕刘海腾郭松丁志文
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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