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Blue wet leather treatment process

A treatment process, technology of wet blue leather, applied in small hide/big hide/leather/fur treatment, small hide/big hide/leather/fur mechanical treatment, leather/skin/leather/hide chemical treatment equipment, etc., capable of Solve the problems of poor retanning effect and leather performance, grain surface wrinkles cannot be completely opened, poor dyeing uniformity, etc., to achieve the effect of improving retanning effect, improving dyeing uniformity, and reducing loose surface rate

Active Publication Date: 2014-05-21
XINGYE LEATHER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The processing process from raw hide to wet blue leather mainly includes: batching → water purification → fleshing → dehairing, liming, fleshing → splitting → deliming → softening → pickling → tanning → squeezing and stretching → wet blue leather, raw materials The individual differences of the leather are very large, and the quality of the finished product needs to be stabilized through group batches. After the wet blue leather is obtained, the wet blue leather is processed. The main process is wet blue leather → peeling → smoothing → weighing → Rinsing → re-dyeing, using this treatment process to treat wet blue leather, the grain wrinkles of the leather cannot be completely opened, the leather yield is small, the dyeing uniformity is poor, and the retanning effect is relatively low compared to the leather performance. Poor, high loose surface rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A treatment process for wet blue leather, including the following process steps, except water squeezing and shaving, other treatment steps are all performed by drum operation, the mechanical action mode is uniform rotation, and the rotation speed is 7r / min, and the amount of chemical raw materials used is expressed in terms of leather weight Based on:

[0015] (1) Squeeze and shave: Squeeze and shave the wet blue leather according to the conventional process, and the thickness of the shaving is 1.05-1.10mm;

[0016] (2) Rinsing: Put the shaved wet blue leather into the drum, add 200 parts by weight of water at 40°C, add 0.5 parts by weight of oxalic acid, 0.3 parts by weight of surfactant Borron SAF, and 0.3 parts by weight of degreasing agent MPC parts by weight, rotate for 40min, drain the residual liquid and rinse;

[0017] (3) Neutralization and retanning: Add 150 parts by weight of water at 30°C, add sodium formate and sodium bicarbonate to adjust the pH to 4.5, a...

Embodiment 2

[0023] A treatment process for wet blue leather, including the following process steps, except water squeezing and shaving, other treatment steps are all performed by drum operation, the mechanical action mode is uniform rotation, and the rotation speed is 7r / min, and the amount of chemical raw materials used is expressed in terms of leather weight Based on:

[0024] (1) Squeezing and shaving: Squeeze, slice and shave the wet blue leather according to the conventional process, and the shaving thickness is 1.05-1.10mm;

[0025] (2) Rinse: add 200 parts by weight of water at 40°C, add 0.5 parts by weight of oxalic acid, 0.3 parts by weight of surfactant Borron SAF, and 0.3 parts by weight of degreasing agent MPC, rotate for 30 minutes; drain the residual liquid and rinse;

[0026] (3) Neutralization, retanning and filling: add 150 parts by weight of water at 30°C, add 3 parts by weight of neutralized tannin PAK, adjust the pH to 4.5 with sodium formate and sodium bicarbonate, an...

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PUM

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Abstract

The invention relates to the technical field of leather processing, and provides a blue wet leather treatment process which increases the yield of leather area, and is lower in loose side rate, uniform to dye, better in leather performance, less in use level of grease, economical, and cost-saving. The process comprises the following steps: splitting; shaving; weighing; rinsing; and retanning. The process is characterized in that at least a shaving treatment is further carried out after retanning step.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a wet blue leather processing technology. Background technique [0002] The processing process from raw hide to wet blue leather mainly includes: batching → water purification → fleshing → dehairing, liming, fleshing → splitting → deliming → softening → pickling → tanning → squeezing and stretching → wet blue leather, raw materials The individual differences of the leather are very large, and the quality of the finished product needs to be stabilized through group batches. After the wet blue leather is obtained, the wet blue leather is processed. The main process is wet blue leather → peeling → smoothing → weighing → Rinsing → re-dyeing, using this treatment process to treat wet blue leather, the grain wrinkles of the leather cannot be completely opened, the leather yield is small, the dyeing uniformity is poor, and the retanning effect is relatively low compared to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C15/00C14B1/02
Inventor 吴华春蔡建设徐袖军何永超
Owner XINGYE LEATHER TECH CO LTD
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