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A kind of preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof light-resistant suede leather

A semi-vegetable tanning and environmentally friendly technology, applied in the field of suede leather, to achieve the effect of tight leather surface, fine suede surface, and reduced empty parts

Active Publication Date: 2022-07-19
FENGAN LEATHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to aim at the defects and deficiencies of the prior art, to provide a method that can overcome the shortcomings of a single non-chrome tanning process, greatly improve the light resistance, dyeability, and mildew resistance of suede, and can realize chrome-free tanning, A kind of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather preparation method that greatly reduces pollution problems such as formaldehyde

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, the technical scheme adopted by this specific embodiment is:

[0039] A preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather comprises the following steps in sequence:

[0040] Step 1: Add bovine bilayer hide, white tannin extract and Litopo GLH to the drum and rotate for 55 minutes, then add Dawitan ZAT polymetallic tanning agent for retanning and rotate for 160 minutes, then add sodium formate and rotate for 15 minutes, then add Sodium bicarbonate turns for 25 minutes;

[0041] Step 2: Add the alkali-extracting agent again, adjust the pH to 3.5, rotate for 100 minutes, and discharge the solution in the drum after rotating;

[0042] Step 3: Add water at 25°C, add sodium formate, neutralize tannin and rotate for 25 minutes, then add ammonium bicarbonate and sodium bicarbonate and rotate for 55 minutes, then add synthetic tanning agent and rotate for 25 minutes, then check the second lay...

Embodiment 2

[0057] Embodiment 2, the technical scheme adopted in this specific embodiment is:

[0058] A preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather comprises the following steps in sequence:

[0059] Step 1: Add bovine bilayer hide, white tannin extract, Litopo GLH to the drum and rotate for 60 minutes, then add Dawitan ZAT polymetallic tanning agent for retanning and rotate for 180 minutes, then add sodium formate and rotate for 20 minutes, then add Sodium bicarbonate for 30 minutes;

[0060] Step 2: Add the alkali-extracting agent again, adjust the pH to 4.0, rotate for 120 minutes, and discharge the solution in the drum after the rotation;

[0061] Step 3: Add water at 25-35°C, add sodium formate, neutralize tannin and turn for 30 minutes, then add ammonium bicarbonate and sodium bicarbonate and turn for 60 minutes, then add synthetic tanning agent and turn for 30 minutes, then check the cow The state o...

Embodiment 3

[0076] Embodiment 3, the technical scheme adopted by this specific embodiment is:

[0077] A preparation method of environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather comprises the following steps in sequence:

[0078] Step 1: Add bovine bilayer hide, white tannin extract, Litopo GLH to the drum and rotate for 65 minutes, then add Dawitan ZAT polymetallic tanning agent for retanning and rotate for 200 minutes, then add sodium formate and rotate for 25 minutes, then add Sodium bicarbonate turns for 35 minutes;

[0079] Step 2: add the alkali extraction agent again, adjust the pH to 4.5, rotate for 140 minutes, and discharge the solution in the drum after the rotation;

[0080] Step 3: Add water at 35°C, add sodium formate, neutralize tannin and rotate for 35 minutes, then add ammonium bicarbonate and sodium bicarbonate and rotate for 65 minutes, then add synthetic tanning agent and rotate for 35 minutes, then check the second ...

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Abstract

The present invention provides an environment-friendly semi-contamination which can overcome the shortcomings of a single non-chrome tanning process, greatly improve the light fastness, dyeability and mildew resistance of the suede, realize chrome-free tanning, and greatly reduce the pollution problems such as formaldehyde. The preparation method of vegetable-tanned-metal-tanned mildew-proof and light-resistant suede leather includes the following steps in sequence: Step 1: add bovine split leather, white tannin extract, and Litopo GLH in a rotating drum and rotate for 55-65 minutes, and then Add Davitan ZAT multi-metal tanning agent for retanning and rotate for 160-200 minutes, then add sodium formate and rotate for 15-25 minutes, and then add sodium bicarbonate and rotate for 25-35 minutes; Step 2: Add alkali extraction agent again, adjust pH to 3.5 ‑4.5, rotate for another 100‑140 minutes, and discharge the solution in the drum after rotation.

Description

technical field [0001] The invention relates to the technical field of suede leather, in particular to a preparation method of an environment-friendly semi-vegetable tanned-metal tanned mildew-proof and light-resistant suede leather. Background technique [0002] Suede leather is made by grinding the surface of the leather blank into a velvety shape and then dyeing it in various popular colors. Suede can be imitated by artificial leather, or it can be made of two layers of leather. [0003] As the mainstream technology of current leather tanning, chrome tanning can endow leather with excellent physical and chemical properties, but there are serious environmental pollution problems, which mainly include three aspects: (1) pollution from the production and processing of chrome-containing materials; (2) tanning production process Pollution of sewage, sludge and chromium-containing solid waste; (3) Secondary pollution to the environment after consumption of chromium-containing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/28C14C1/08C14C9/02C14C11/00C14B1/58
CPCC14C3/28C14C1/08C14C9/02C14C11/00C14B1/58
Inventor 郑景添李建华邹佳明朱室清
Owner FENGAN LEATHER
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