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Preparation method of environment-friendly semi-vegetable tanning-metal tanning mould-proof light-resistant suede leather

A semi-vegetable tanning, environmentally friendly technology, applied in the field of suede leather, to achieve the effect of high leather yield, stiff body and less vacant parts

Active Publication Date: 2021-05-11
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 that this embodiment mode adopts is:

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

[0040] Step 1: Add cow split hide, white tannin extract, Litobo GLH into the drum and rotate for 55 minutes, then add Davitan ZAT multi-metal tanning agent for retanning and rotate for 160 minutes, then add sodium formate and rotate for 15 minutes, then add NaHCO3 rotation for 25 minutes;

[0041] Step 2: add 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 syntan and rotate for 25 minutes, then check the second layer of cattle the state of the sk...

Embodiment 2

[0057] Embodiment 2, the technical scheme that this embodiment mode adopts is:

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

[0059] Step 1: Add cow split hide, white tannin extract, Litobo GLH into the drum and rotate for 60 minutes, then add Davitan ZAT multi-metal tanning agent for retanning and rotate for 180 minutes, then add sodium formate and rotate for 20 minutes, then add NaHCO3 rotation for 30 minutes;

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

[0061] Step 3: Add water at 25-35°C, add sodium formate, neutralize tannin and rotate for 30 minutes, then add ammonium bicarbonate and sodium bicarbonate and rotate for 60 minutes, then add syntan and rotate for 30 minutes, then check the cattle The skin state of the split skin...

Embodiment 3

[0076] Embodiment 3, the technical scheme that this embodiment mode adopts is:

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

[0078] Step 1: Add cow split hide, white tannin extract, Litobo GLH into the drum and rotate for 65 minutes, then add Davitan ZAT multi-metal tanning agent for retanning and rotate for 200 minutes, then add sodium formate and rotate for 25 minutes, then add NaHCO3 rotation for 35 minutes;

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

[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 syntan and rotate for 35 minutes, then check the second layer of cattle the state of the skin; ...

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Abstract

The invention provides a preparation method of environment-friendly semi-vegetable tanning-metal tanning mildew-resistant light-resistant suede leather, and the method can overcome the defects of a single non-chrome tanning process, greatly improve the light resistance, dyeing property and mildew resistance of the suede leather, realize chrome-free tanning and greatly reduce formaldehyde and other pollution problems. The method comprises the following steps in sequence: step 1, adding cow split leather, Tara tannins and Lutapol GLH into a rotary drum, conducting rotating for 55-65 minutes, then adding a Dowelltan ZAT multi-metal tanning agent, conducting retanning, conducting rotating for 160-200 minutes, then adding sodium formate, conducting rotating for 15-25 minutes, then adding sodium bicarbonate, and conducting rotating for 25-35 minutes; and 2, adding an alkali extracting agent, adjusting the pH value to 3.5-4.5, conducting rotating for 100-140 minutes, and discharging the solution in the rotary drum after rotating.

Description

technical field [0001] The invention relates to the technical field of suede leather, in particular to a method for preparing an environment-friendly semi-vegetable-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 velvet shape, and then dyeing it in various popular colors. Suede can be imitated by artificial leather, or it can be made of split leather. [0003] As the mainstream technology of leather tanning, chrome tanning can endow leather with excellent physical and chemical properties, but there are serious environmental pollution problems, mainly including three aspects: (1) pollution from the production and processing of chromium-containing materials; (2) leather production process (3) Secondary pollution to the environment after consumption of chromium-containing products. With the development of the global economy and the progress of society, the enha...

Claims

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Application Information

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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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