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Method for tanning non-metal tanned goat leather for making garment

A technology for goatskin and garment leather, which is applied in leather degreasing, leather impregnation, small raw hide/large raw hide/leather/fur treatment, etc., can solve the problem of the difficulty of chrome-free tanning and fatliquoring process, the unsatisfactory tensile strength, Problems such as poor physical properties of chrome-free tanned leather can achieve good mechanical and physical properties, avoid the use of metal tanning agents, and reduce environmental pressure.

Active Publication Date: 2010-06-09
日照市信腾信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the bonding points between chrome-free tanned leather and collagen fibers are relatively small, it has a great influence on the subsequent fatliquoring process, and there are few fatliquoring agents for chrome-free tanning in the market, so the fatliquoring process of chrome-free tanning is relatively difficult Big
At the same time, the physical properties of some chrome-free tanned leathers are relatively poor, mainly in the uneven dyeing of the leather base, and the tensile strength cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Rehumidification

[0036] Take 6% salt and dissolve it in 80% normal temperature water, turn it for 10 minutes, and add the pickled skin after the salt is completely dissolved. After diluting 1% baking soda with 10 times of water, add it into the drum twice, adjust the pH to 5.5-6.0, and continue to rotate for 20 minutes.

[0037] (2) Pre-tanning

[0038] In the first step, add 4% vegetable tanning agent to the rewetting liquid, rotate for 3 hours, then heat up to 35° C., and continue to rotate for 3 hours. Add 0.5% formic acid to adjust the pH to 4.0, stop the drum, overnight, and drain.

[0039] (3) Degreasing

[0040] After the second step is completed, add 1% degreaser and 100% 35°C water to the drum, and rotate for 40 minutes. After changing the liquid, wash with 300% 35°C water for 10 minutes, and drain;

[0041] (4) Fatliquor

[0042] After the third step is completed, add 130% of 45°C water into the drum, and use 45°C water to dissolve 12% of the fatliq...

Embodiment 2

[0053] (1) Rehumidification

[0054] Take 7% salt and dissolve it in 80% normal temperature water, turn it for 10 minutes, and add the pickled skin after the salt is completely dissolved. After diluting 1% baking soda with 10 times of water, add it into the drum twice, adjust the pH to 5.5-6.0, and continue to rotate for 25 minutes.

[0055] (2) Pre-tanning

[0056] In the first step, add 5% vegetable tanning agent to the rewetting liquid, rotate for 3 hours, then heat up to 35° C., and continue to rotate for 3 hours. Add 0.5% formic acid to adjust the pH to 4.0, stop the drum, overnight, and drain.

[0057] (3) Degreasing

[0058] After the second step is completed, add 1% degreaser and 100% 30°C water to the drum, and rotate for 30 minutes. After changing the liquid, wash with 200% 35°C water for 15 minutes, and drain;

[0059] (4) Fatliquor

[0060] After the third step is completed, add 100% of 45°C water to the drum, and then use 45°C water to dissolve 8% of the fatl...

Embodiment 3

[0071] (1) Rehumidification

[0072] Take 8% salt and dissolve it in 100% normal temperature water, turn it for 15 minutes, wait for the salt to dissolve completely, then add the sour skin. After diluting 1.5% baking soda with 10 times of water, add it into the drum twice, adjust the pH to 5.5-6.0, and continue to rotate for 30 minutes.

[0073] (2) Pre-tanning

[0074] In the first step, add 6% vegetable tanning agent to the rewetting liquid, rotate for 5 hours, then heat up to 35° C., and continue to rotate for 5 hours. Add 1% formic acid to adjust the pH to 4.0, stop the drum, overnight, and drain.

[0075] (3) Degreasing

[0076] After the second step is completed, add 1.5% degreaser and 150% 30°C water to the drum, and rotate for 40 minutes. After changing the liquid, wash with 300% 35°C water for 10 minutes, and drain;

[0077] (4) Fatliquor

[0078] After the third step is completed, add 150% of 55°C water into the drum, and use 55°C water to dissolve 10% of the fa...

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Abstract

The invention discloses a method for tanning non-metal tanned goat leather for making garment. The method adopts a combination of two non-metal tanning agents of a plant tanning agent and an organic phosphine for tanning, and simultaneously, adds a certain amount of terminal amino-dendrimers in the post period of stuffing lipid so as to greatly reduce the content of free formaldehyde in leather, wherein Ts (shrinkage temperature) is greater than or equal to 90 DEG C; and the removal rate of formaldehyde can reach up to 70 percent. The leather has good ageing resistant performance and ventilation property; and all of the other physical and mechanical performance such as tensile strength, tearing strength and the like can reach the standards of chrome tanned leather in the same type.

Description

technical field [0001] The invention belongs to the field of leather tanning, in particular to a method for tanning metal-free goatskin garment leather. Background technique [0002] Although chrome tanned leather has good shrinkage temperature and excellent physical properties, recent studies have shown that Cr in chrome tanned leather 3+ It is easily oxidized to carcinogenic Cr under the conditions of external light, heat, sweat, etc. 6+ As a result, the European Union and other countries have higher and higher requirements for the leather products exported by my country. Clean production is the only way for the sustainable development of the leather industry. Although there are many researches on chrome-free tanning technology, it is difficult to promote it in factories change. [0003] The main problem facing chrome-free tanning agents at present is that the formaldehyde content in the finished leather seriously exceeds the standard. Since the bonding points between ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/28C14C3/10C14C3/08C14C5/00C14C9/02
Inventor 强涛涛赵宇王学川任龙芳
Owner 日照市信腾信息科技有限公司
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