White anti-yellowing cow split leather and manufacturing method thereof

A production method and a technology of resistance to yellowing, applied in dyeing method, leather impregnation, small raw hide/large raw hide/leather/fur treatment, etc. Rich tones, good light fastness, fade-resistant effect

Active Publication Date: 2020-03-31
漳州香洲皮革有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing light-colored cow split leather, especially very light and white leather, is not resistant to yellowing and is easy to age during use, resulting in serious powder loss. After powder loss, it

Method used

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  • White anti-yellowing cow split leather and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation method of white anti-yellowing cow split leather comprises the following steps:

[0052] The wet blue leather is subjected to rewetting → primary retanning → alkaline extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → laminating → drying → softening → smoothing → drumming, specifically:

[0053] Step 1, rehumidification: put the wet blue hide in the drum, add 200% water, 0.2%-0.4% rehumidifier Usabang W, and 0.5% degreasing Youshabang OC, run for 60min, add 1.0% acid softening enzyme TJ-A489, 1.0% ammonium bisulfate, run for 120min, add 0.5% formic acid, run for 40min, add 1.5% anti-spot agent TJ-A9811, Run for 60 minutes, add 1.0% oxalic acid, run for 60 minutes, drain, add 300% water, wash with water and drain to get wet leather;

[0054] Step 2, primary retanning: according to the mass percentage of wet blue leather, add 100% water and 0.5% formic acid into the drum, adjust the pH to 2.8-3.2, run for 40 minutes...

Embodiment 2

[0061] The preparation method of white anti-yellowing cow split leather comprises the following steps:

[0062] The wet blue leather is subjected to rewetting → primary retanning → alkaline extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → laminating → drying → softening → smoothing → drumming, specifically:

[0063] Step 1, rehumidification: put the wet blue hide in the drum, and add 150% water, 0.2% rehumidifying agent Ushabang W, and 0.4% degreaser Ushabang in sequence according to the mass percentage of the wet blue hide Bang OC, run for 55min, add 0.8% acid softening enzyme TJ-A489, 0.8% ammonium bisulfate, run for 115min, add 0.4% formic acid, run for 35min, add 1.4% anti-spot agent TJ-A9811, run for 55min, Add 0.9% oxalic acid, run for 55 minutes, drain, add 250% water, wash with water and drain, and get wet leather;

[0064] Step 2, primary retanning: according to the mass percentage of wet blue leather, add 95% water and 0.4% ...

Embodiment 3

[0071] The preparation method of white anti-yellowing cow split leather comprises the following steps:

[0072] The wet blue leather is subjected to rewetting → primary retanning → alkaline extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → laminating → drying → softening → smoothing → drumming, specifically:

[0073] Step 1, rehumidification: put the wet blue hide in the drum, and add 250% water, 0.4% rehumidifying agent Ushabang W, and 0.6% degreaser Ushabang in sequence according to the mass percentage of the wet blue hide Bang OC, run for 65min, add 1.2% acid softening enzyme TJ-A489, 1.2% ammonium bisulfate, run for 125min, add 0.6% formic acid, run for 45min, add 1.6% anti-spot agent TJ-A9811, run for 65min, Add 1.1% oxalic acid, run for 65 minutes, drain, add 350% water, wash with water and drain, and get wet leather;

[0074] Step 2, primary retanning: according to the mass percentage of wet blue leather, add 105% water and 0.6%...

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Abstract

The invention relates to white anti-yellowing cow split leather and a manufacturing method thereof, and belongs to the technical field of leather manufacturing. The manufacturing method of the white anti-yellowing cow split leather comprises the following steps that wet blue leather is sequentially subjected to rewetting, primary retanning, alkali extraction, secondary retanning, primary dyeing, main fat liquoring, secondary dyeing, plate pasting, drying, softening, buffing and drum milling, and the white anti-yellowing cow split leather is obtained. The white cow split leather prepared by theinvention is free of powder falling in the use process, high in quality and excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of leather production, and in particular relates to a white anti-yellowing cow split leather and a production method thereof. Background technique [0002] The existing light-colored cow split leather, especially very light and white leather, is not resistant to yellowing and is easy to age during use, resulting in serious powder loss. After powder loss, it will not only affect the quality of the leather, but also It will affect the performance of leather, so the research on white anti-yellowing cow split leather and its production method is particularly important. Contents of the invention [0003] The object of the present invention is to solve the deficiencies of the prior art, and to provide a white anti-yellowing cow split leather and its production method. The white cow split leather produced by the method does not lose powder during use, and the quality is high-grade. Excellent performance. [000...

Claims

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Application Information

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IPC IPC(8): C14C1/08C14C1/04C14C3/04C14C3/08C14C3/10C14C3/28C14C9/02D06P1/673D06P1/653D06P3/32
CPCC14C1/08C14C1/04C14C3/04C14C3/08C14C3/10C14C3/28C14C9/02D06P1/002D06P1/673D06P1/6533D06P3/32
Inventor 雷丙南林汉彬陈启明杨俊昇
Owner 漳州香洲皮革有限公司
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