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Leather patching method

A technology of leather and wound repairing agent, applied in leather surface treatment, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Easy to dent and other problems, to achieve the effect of thin and soft coating, not easy to dent, strong filling and covering power

Inactive Publication Date: 2019-04-05
XINGYE LEATHER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wound repair is the basis of the entire coating layer. Although traditional repair agents can fill up the defects or defects in the grain surface of the crust leather, the coating has technical defects such as not being resistant to falling and easy to dent.

Method used

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  • Leather patching method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for repairing leather wounds, comprising the following steps in sequence:

[0032] (1) Crude leather is softened by vibration: the strength of softening by vibration is grade 5;

[0033] (2), dry vacuum: dry vacuum temperature 40 ℃, dry vacuum time 90 seconds, vacuum degree -0.1Mpa;

[0034] (3) Grinding: For inner grinding, use 320-mesh sandpaper to treat the meat surface of the crust leather; for grinding the surface, use 600-mesh sandpaper to treat the defects or disabled parts of the crust leather grain surface; control the moisture content of the crust leather during leather grinding at 15-20%;

[0035] (4), dust removal clean surface;

[0036] (5), wound repair: wound repair agent roller coating, the wound repair agent coating amount is 12g / sf; Wherein, the preparation method of wound repair agent is: first 40 parts of water and 30 parts of casein RODA bind TU 688 / B ( Deruipi Chemical Co., Ltd.) mixed, fully stirred, the stirring speed was 950r / min, an...

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Abstract

The invention relates to the technical field of leather chemistry and engineering and provides a leather patching method. A polyurethane foam resin material is introduced into a patching agent for patching to create a hollow-system patching agent, density of the patching agent is reduced while strength is excellent and stable, and accordingly an elastic stable object is formed. In addition, by combination of mechanical operations such as roller coating and press polishing, the patching agent can be firmly filled at defective or damaged parts of crust leather. The technical defects of lack of falling resistance and proneness to recessing of traditional patching coatings are overcome, a production cycle is shortened, and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of tanning chemistry and engineering, in particular to a method for repairing leather wounds. Background technique [0002] Repairing wounds, that is, using repairing agents to cover up the natural defects or disabilities of raw hides, such as punctures, scratches, ringworm spots, etc., as well as defects or disabilities caused by improper control of tanning production processes and mechanical operations, such as coarse leather. Surface, color pattern, color difference, etc., so as to improve the grade rate and cutting rate of leather. The repairing agent is a multi-component mixture, and the film performance is not determined by a certain component, but the comprehensive result of each component. Therefore, in actual production, it should be based on the defect or disability of the crust leather and the style of the finished leather. Carefully select repair materials and repair methods to achieve the requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C11/00
CPCC14C11/00
Inventor 孙辉永王小卓温会涛王磊梁永贤柯俊雄
Owner XINGYE LEATHER TECH CO LTD
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