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Energy saving and emission reduction method for retanning and dyeing high-strength cow split leather furniture

A technology of energy saving, emission reduction and dyeing method, applied in the field of tanning, can solve the problems of leather color tone, full uniformity, weak mechanical effect, large loading capacity, etc., to improve the production operating environment, save chemical materials, The effect of water-saving chemicals

Active Publication Date: 2010-08-11
浙江通天星集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at solving the technical problems of full-area color tone and plump uniformity of the leather when retanning and dyeing cowhide leather to manufacture furniture leather due to the large loading capacity, less liquid and weak mechanical action in the process of using the Y-type drum in the prior art. Disadvantages of dyeing process for use on small areas (≤1m2) and low loads (≤60%), providing a method for use on large areas (≥5m2) and high loads (≥70%) Retanning, dyeing and fatliquoring of leather, by changing the operation method, controlling the strict material formula and dosage, reducing the mechanical effect on the second layer of leather, so as to obtain higher strength, and solve the problem of the full area of ​​leather when retanning and dyeing cowhide to manufacture furniture leather Energy-saving and emission-reducing retanning and dyeing method of high-strength cowhide two-layer furniture leather with technical problems of color tone and plump uniformity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for retanning and dyeing of high-strength cowhide two-layer furniture leather with energy saving and emission reduction, comprising the following steps:

[0031] Step a: softening: Put 100 parts of wet blue leather and 50 parts of water at a temperature of 35°C into the drum, rotate for 30 minutes, add 1 part of softening agent, 0.2 parts of formic acid, and rotate in the drum forward and backward to soften , continue to rotate for 100 minutes, drain;

[0032] Step b: Chrome retanning: Add 50 parts of water at 35°C, 2 parts of auxiliary syntan, rotate for 10 minutes, add 4 parts of chrome powder, rotate forward and reverse for 10 minutes, repeat 4 times, stop the drum, Add 3 parts of neutralizing agent, add in 2 times, each time at an interval of 20 minutes, adjust the pH of the bath solution to 4.1-4.2, rotate forward and reverse at intervals, each rotation is 20 minutes, stop for 40 minutes, repeat 6 times;

[0033]Step c: Neutralization: Add 0.5 parts of ba...

Embodiment 2

[0038] The energy-saving and emission-reducing retanning and dyeing method of high-strength cowhide two-layer furniture leather, on the basis of embodiment 1, has increased the following content: adopt the United States, Brazil cowhide two-layer wet blue leather as raw material, furniture leather is sofa leather (single layer Thickness 1.2 ~ 1.4 mm), the retanning and dyeing method, the drum is a Y-type drum, the transfer rate of the Y-type drum is 75%, the auxiliary syntan is a phenolic auxiliary syntan, and the phenolic auxiliary The preferred synthetic tanning agent is methylene dinaphthalene methylated phenolic resin tanning agent, the retanning agent is amino resin retanning agent, the fatliquor is vegetable oil fatliquoring agent, the dispersant is phenolic resin dispersant, and the softening agent is octyl Phenol polyoxyethylene ether, the dye is diaminostilbene disulfonic acid direct dye, and the neutralizing agent is ammonium bicarbonate.

Embodiment 3

[0040] A method for retanning and dyeing of high-strength cowhide two-layer furniture leather with energy saving and emission reduction, comprising the following steps:

[0041] Step a: softening: Put 100 parts of wet blue leather and 80 parts of water at a temperature of 40°C into the drum, rotate for 30 minutes, add 2 parts of softening agent and 0.3 parts of formic acid, and turn it back and forth in the drum to soften , continue to rotate for 120 minutes, drain;

[0042] Step b: Chrome retanning: Add 80 parts of water at 40°C, 4 parts of auxiliary syntan, rotate for 20 minutes, add 4 parts of chrome powder, rotate forward and reverse for 20 minutes, repeat 4 times, stop the drum, Add 3 parts of neutralizing agent, add in 2 times, each time with an interval of 20 minutes, adjust the pH of the bath solution to 4.1-4.2, rotate forward and reverse at intervals, each rotation is 20 minutes, stop for 40 minutes, repeat 8 times;

[0043] Step c: Neutralization: Add 0.7 parts of ...

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Abstract

The invention relates to the field of leather production and discloses an energy saving and emission reduction method for retanning and dyeing high-strength cow split leather furniture. The method comprises the following steps of: conditioning; chromium retanning; neutralizing; retanning; dyeing and greasing; and obtaining a finished product by standing, wetly toggling, oscillating, stuffing leather, lightly wrestling and lightly toggling. The invention effectively overcomes the defects that the traditional Y-shaped drum is mainly applied to the dyeing process of leather with small area (not more than 1 square meter) and less load capacity (not more than 60 percent), can be applicable for retanning, dyeing and greasing a leather pelt with larger area (not less than 5 square meters) and high loading capacity (not less than 70 percent), and solves the technical problems that furniture leather has all-area tone and saturated uniformity when produced by retanning and dyeing cow leather, thereby being a leather producing technology with high efficiency and low pollution.

Description

technical field [0001] The invention relates to the field of tanning, in particular to an energy-saving, emission-reducing, retanning and dyeing method for high-strength cowhide two-layer furniture leather. Background technique [0002] my country's "Eleventh Five-Year Plan" Outline, for the first time, regards energy conservation as a binding indicator, and clearly proposes to strive to reduce energy consumption per unit of GDP by about 20% in the next five years. This is an important measure to fully implement the two strategic ideas of the scientific outlook on development and the construction of a socialist harmonious industrial ecological environment, and to alleviate the contradiction of resource constraints. The task is arduous and of great significance. [0003] From a macro perspective, increasing energy conservation and consumption reduction is not only the fundamental way out to alleviate the constraints of our country's energy resources, but also an important gua...

Claims

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Application Information

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IPC IPC(8): C14C3/08C14C3/04C14C1/08C14C9/02C14C15/00D06P3/32
Inventor 宋汝强余陆沐徐祥进兰莉单志华邵双喜
Owner 浙江通天星集团股份有限公司
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