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Shaped tanning method of leather

A tanning and leather technology, applied in the field of leather tanning, can solve the problems of scratches, fat wrinkling, pest damage, smaller area of ​​bare leather, and lower grade of finished leather, etc., to reduce pollution, easy to recycle, The effect of low tear strength

Inactive Publication Date: 2007-02-28
CHINA LEATHER & FOOTWEAR IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the tanning process, the combination of leather fiber and tanning agent makes the leather thicker, and the area of ​​the leather is significantly smaller than that of the bare leather before tanning, resulting in a lower leather yield and lower economic benefits.
The leather fiber is fixed by the tanning agent in the tanning solution, so that the grain surface of the leather presents a natural grain pattern. If there are defects such as scratches, fat wrinkles, and pest damage on the original hide, these defects will be fixed on the surface of the leather. , resulting in a decline in the grade of the finished leather, even if these defects can be remedied by embossing, repainting, etc., but the economic benefits will inevitably decline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, the stereotyped chrome tanning of the pigskin shoe lining leather with cowhide pattern:

[0015] (1) Paste the sour skin grain surface of pigskin on the stainless steel plate with cowhide pattern, push the sour skin meat surface around with a scraper, so that the sour skin is tightly attached to the stainless steel plate, and the area of ​​the sour skin will increase by about 20% - 25%, place four stainless steel wire meshes of 60 mesh, 40 mesh, 25 mesh and 10 mesh on the sour skin meat surface, press another stainless steel plate on the wire mesh, and apply a pressure of 6000Pa;

[0016] (2) Put normal temperature water in a stainless steel tank with a vibrating device. The amount of water should be just below the steel plates pressed together. Add salt to make the Baume degree reach 8Be°. Add formic acid to adjust the pH to 2.7. Put the steel plates pressed together into water, add chromium powder to make Cr in the tanning solution 2 o 3 The content of...

Embodiment 2

[0017] Embodiment 2, utilize the low-grade surface to have the cowhide that scratches and punctures to produce the stereotyped chrome tanning of high-grade cowhide sofa leather:

[0018] (1) Paste the low-grade cowhide sour skin grain surface with scratches on the stainless steel plate with cowhide pattern, and use the scraper to push the sour skin and meat surface around, so that the sour skin is tightly attached to the stainless steel plate At this time, the area of ​​the sour skin increases by about 10%-15%. Place four stainless steel wire meshes of 80 mesh, 60 mesh, 25 mesh and 5 mesh on the sour skin meat surface, and press another stainless steel plate on the wire mesh. , apply a pressure of 5000Pa;

[0019] (2) Put normal temperature water in a stainless steel tank with a vibrating device. The amount of water should be just below the steel plates pressed together. Add salt to make the Baume degree reach 7Be°. Add formic acid to adjust the pH to 2.5. Put the steel plate...

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PUM

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Abstract

The invention relates the leather shaped tanning method, comprising the following steps: using hogskin, cowhide and goatskin as raw materials, treating them, making the grain of the skins adhibit to the metal plate or mechanically resistant material plate, scraping the flesh side with scratch board, on the flesh side putting the material which can make tanning liquor flow, on the material putting metal plate or mechanically resistant material plate, forcing on the plate, putting them into tanning liquor, making them move, heating, and getting the product.

Description

technical field [0001] The invention relates to the technical field of leather industrial production, in particular to a leather tanning method. Background technique [0002] At present, the tanning of leather generally adopts the drum tanning method. The process is to put the bare hide and tanning liquor after a series of pre-tanning preparation processes together into the drum for rotation, and the rotation of the drum plays the role of stirring the bare hide and tanning liquor, and makes the bare hide suffer to a certain degree. mechanical action to complete the tanning process. Because during the rotation of the drum, the bare hide is continuously stretched, squeezed, bent and other mechanical deformations, and there is also a lot of friction between the hides, all these functions promote the penetration of the tanning solution into the hide. At the same time, it will inevitably cause a certain degree of damage to the fibers of the leather. The specific manifestations ...

Claims

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Application Information

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IPC IPC(8): C14C1/00C14C3/00
Inventor 杨承杰陈杰贾继章宋昕
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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