Production method of soft vegetable leather

A production method and technology for vegetable tanned leather, which are applied in the fields of leather/skin/leather/raw hide chemical treatment equipment, leather surface treatment, chemical treatment before tanning, etc. Good oil lubricity and the effect of improving tensile strength

Active Publication Date: 2022-02-25
湖南银河制革有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a production method of soft vegetable tanned leather, which solves the shortcomings of the original vegetable tanned leather, such as stiffness and low physical properties, on the basis of maintaining the vegetable tanned feeling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for producing soft vegetable tanned leather, comprising the following steps: S1 rinsing; S2 surface dyeing; S3 retanning neutralization: liquid ratio 140%, temperature 36°C, adding 1WT% sodium formate and 1WT% neutralized tannin, Rotate at 10 rpm for 28 minutes, add 0.4WT% baking soda and rotate for 18 minutes, add 1WT% replacement tannin, 0.8WT% sulfited beef hoof oil and rotate for 75 minutes, stop the drum overnight, control PH4, and neutralize Fully transparent; S4 filling: liquid ratio 48%, temperature 38°C, add dicyandiamide resin tanning agent 3WT%, melamine resin 3WT% quebracho extract 8WT%, compound tanning agent 1WT%, after rotating for 35 minutes, add acrylic resin 6WT%, white extract 6WT%, anti-electrolyte fatliquor 0.8WT%, rotate for 50 minutes, then add wattle bark gum 5WT%, disperse tannin 1WT%, continuously rotate for 110 minutes, add composite dye 1WT% and rotate for 50 minutes; S5 fatliquoring; S6 color fixing; S7 finishing and drying.

[001...

Embodiment 2

[0025] A method for producing soft vegetable tanned leather, comprising the following steps: S1 rinsing; S2 surface dyeing; S3 retanning and neutralization: liquid ratio 160%, temperature 38°C, adding 3WT% sodium formate and 3WT% neutralized tannin, Rotate for 32 minutes at 14 rpm, add 0.6WT% baking soda and rotate for 22 minutes, add 3WT% replacement tannin, 1.2WT% sulfited beef hoof oil and rotate for 85 minutes, stop the drum overnight, control PH5, and neutralize Fully transparent; S4 filling: liquid ratio 52%, temperature 42°C, add dicyandiamide resin tanning agent 5WT%, melamine resin 5WT% quebracho extract 12WT%, compound tanning agent 4WT%, after rotating for 45 minutes, add acrylic resin 10WT%, white extract 8WT%, anti-electrolyte fatliquor 1.2WT%, rotate for 70 minutes, then add wattle bark gum 7WT%, disperse tannin 3WT%, continuously rotate for 130 minutes, add composite dye 3WT% and rotate for 70 minutes; S5 fatliquoring; S6 color fixing; S7 finishing and drying. ...

Embodiment 3

[0033] A method for producing soft vegetable tanned leather, comprising the following steps: S1 rinsing; S2 surface dyeing; S3 retanning and neutralization: liquid ratio 150%, temperature 37°C, adding 2WT% sodium formate and 2WT% neutralized tannin, Rotate at 13 rpm for 30 minutes, add baking soda 0.5WT% and rotate for 20 minutes, add replacement tannin 2WT%, sulfited beef hoof oil 1WT% and rotate for 80 minutes, stop the drum overnight, control PH4, neutralize all Permeable; S4 filling: liquid ratio 50%, temperature 40°C, add dicyandiamide resin tanning agent 4WT%, melamine resin 4WT% quebracho extract 10WT%, compound tanning agent 3WT%, after turning for 40 minutes, add acrylic resin 8WT %, white extract 7WT%, anti-electrolyte fatliquoring agent 1WT%, rotate for 60 minutes, then add wattle bark gum 6WT%, disperse tannin 2WT%, continue to rotate for 120 minutes, add composite dye 2WT% and rotate for 60 minutes; S5 plus Grease; S6 color fixation; S7 finishing and drying.

[0...

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PUM

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Abstract

The invention discloses a production method of soft vegetable leather. The production method comprises the following steps: S1, rinsing; S2, surface dyeing; S3, retanning and neutralizing: adding 1-3WT% of sodium formate and 1-3WT% of neutralizing tannin at the liquor ratio of 140-160% and the temperature of 36-38 DEG C, rotating for 28-32 minutes under the condition of 10-14 revolutions/min, adding 0.4-0.6 WT% of baking soda, rotating for 18-22 minutes, adding 1-3WT% of replacement tannin and 0.8-1.2 WT% of sulfitation cattle hoof oil, rotating for 75-85 minutes, stopping the drum overnight, controlling the PH to be 4-5, and completely neutralizing; S4, filling: adding 3-5WT% of a dicyandiamide resin tanning agent, 3-5WT% of melamine resin, 8-12WT% of quebracho extract and 1-4WT% of a composite tanning agent at the liquid ratio of 48-52% and the temperature of 38-42 DEG C, rotating for 35-45 minutes, adding 6-10WT% of acrylic resin, 6-8WT% of tara tannin and 0.8-1.2 WT% of an electrolyte-resistant fat liquor, rotating for 50-70 minutes, adding 5-7WT% of schizonepeta bark glue and 1-3WT% of dispersed tannin, continuously rotating for 110-130 minutes, adding 1-3WT% of composite dye, and rotating for 50-70 minutes; S5, performing fat liquoring; S6, performing color fixation; and S7, finishing and drying. Compared with the prior art, the method has the following advantages: 1, the requirement on wet blue leather is low; 2, the use amount of the vegetable tanning agent is reduced; and 3, the leather body is lifted.

Description

technical field [0001] The invention relates to a production method of leather, in particular to a production method of soft vegetable tanned leather. Background technique [0002] The conventional vegetable tanning method is a traditional and ancient tanning technology, which has undergone continuous evolution and improvement for decades. From the progress of various aspects such as tanning equipment, chemical materials and production methods. Product quality and variety diversification have been greatly improved, but a significant leather characteristic of vegetable tanned leather, commonly known as "button feel" (that is, vegetable tanned feel), is that it feels stiff and has low physical properties (tear strength). One feature leads to a narrow scope of application of the product. There are few technical solutions that can solve this problem in the prior art. In view of this, the inventor of the present application obtained a production method of soft vegetable tanned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C1/00C14C3/08C14C11/00C14C15/00
CPCC14C1/00C14C3/08C14C11/00C14C15/00
Inventor 于君德徐亚东王辉达董明强
Owner 湖南银河制革有限公司
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