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Method for simulating larix gmelini tanning extract tanned leather by common vegetable tanned leather

A technology of larch extract and vegetable tanned leather, which is applied in the fields of dyeing, small hide/big hide/leather/fur treatment, small hide/big hide/leather skin/fur chemical treatment, etc., and can solve the problem of leather appearance and Negative impact on use performance, detanning of tannin in vegetable tanned leather, high dyeing temperature, etc., to achieve the effects of strong implementability, uniform dyeing, and simple operation

Active Publication Date: 2019-06-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high dyeing temperature and high pH value during color fixation will not only detan a large amount of tannin in vegetable tanned leather, but also cause oxidization of tannin, which will have a negative impact on the appearance and performance of the finished leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 10% myrica rubra extract and 10% rubber bowl extract to the drum with pickling-de-pickling pretreated skins, rotate the drum until the skins are completely tanned, add 300% ethanol dilute in 3 times After doubling the basic fuchsin based on 0.02% of the weight of the bare hide, rotate for 30 minutes after each addition, and soak the vegetable tanned leather in the drum overnight after the color adjustment is completed, and the obtained imitation larch extract tanned vegetable tanned leather is conventionally vegetable-tanned. The tanning treatment process can be followed by subsequent operations.

Embodiment 2

[0025] Add 30% Vitex bark extract to the drum with pickling-de-pickling pretreated skins, rotate the drum until the skins are fully tanned, then add in two batches dilute 100 times with formic acid based on bare skins. Basic scarlet with 0.005% leather weight, rotate for 60 minutes after each addition, soak the vegetable tanned leather in the drum overnight after toning, and the obtained imitation larch extract tanned vegetable tanned leather is followed up by conventional vegetable tanned leather treatment process Just operate.

Embodiment 3

[0027] Add 10% acacia extract, 15% quebracho extract and 10% oak bowl extract to the drum with pickling-de-pickling pre-treated hides, and turn the drum until the hides are tanned , adding 0.01% basic rhodamine and 0.005% basic orange yellow based on the weight of bare leather after being diluted 200 times with acetone in 5 times, rotating for 20 minutes after each addition, and putting the vegetable tanned leather in the drum after toning After soaking overnight, the obtained imitation larch extract tanned vegetable tanned leather can be followed up according to the conventional vegetable tanned leather treatment process.

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Abstract

The invention discloses a method for simulating larix gmelini tanning extract tanned leather by common vegetable tanned leather. The method is characterized in that common tanning extract is subjectedto complete tanning by pelt subjected to pickling and deacidification preprocessing by a drum quick vegetable tanning method, alkaline dye diluted by organic solvent is added in different times through a drum shaft to be subjected to color modulation, the obtained product is dipped for the whole night after color modulation is finished, and the obtained simulated larix gmelini tanning extract tanned leather is subjected to subsequent operation according to a conventional tanned leather processing technology. According to the method provided by the invention, an extremely small quantity of alkaline dye is used for dyeing the tanned leather tanned by common tanning extract, the color of a finished product does not have an obvious difference with larix gmelini tanned leather, and thereafore,the problem that the leather color of the pure tanned leather is difficult in meeting market requirements since larix gmelini tanning extract is in the shortage can be successfully solved.

Description

technical field [0001] The invention belongs to the technical field of leather product production and processing, and in particular relates to a method for using basic dyes to color the vegetable tanned leather tanned with common tannin extract to make it similar to the vegetable tanned leather product tanned with larch tannin extract. Background technique [0002] Larix belongs to the Pinaceae family and belongs to the genus Larix. It is native to Eurasia and is the main tree species in the forest areas of Northeast my country and Inner Mongolia. The bark of larch contains about 15% tannin, which is an important raw material crop for tannin production. Larch extract is a powder obtained from larch bark through extraction, sulfonation and drying, and belongs to the condensation type extract. Larch extract is widely used in the production of pre-tanned, re-tanned and vegetable-tanned chrome-tanned leathers due to the richness, firmness and pleasant piney aroma of the tanned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/12D06P1/41D06P3/32
Inventor 张金伟马成义陈小云
Owner SICHUAN UNIV
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