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Pollution-free leather manufacturing technology

A non-polluting, high-tech technology, applied in dyeing, leather manufacturing, leather softening, etc., can solve the problems of sewage discharge, environmental pollution, etc.

Active Publication Date: 2015-10-07
林善溪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquids such as water in the existing tanning process will not be completely absorbed, so that it will discharge sewage and cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The pollution-free tanning process includes the following steps:

[0038] Skin repair: Workers put the original wet blue skin on the workbench, and remove the useless corners and sub-standard skins according to the quality of the skin, which is called bare skin; soaking: put 800kg of bare skin into the water drum In the water drum, add warm water of 40% of the weight of the bare hide to the water drum to soak the bare hide; after soaking for 25 minutes, turn on the drum to allow the bare hide to absorb water more evenly; 3% sulfuric acid, 10% formic acid, 6% degreasing agent and 12% chromium powder, and then start the drum to work for 75 minutes. Remixing: After the drum is closed, add 0.3% dye and 1.5% soda into it, and then start the drum for tanning for 80 minutes. Re-blending: After the drum is closed, 13% fatliquoring agent and 4% soda are added into it, and the drum is started to continue tanning for 105 minutes. Reinforcing color agent: add 6% color fixing agen...

Embodiment 2

[0040] Skin repair: Workers put the original wet blue skin on the workbench, and remove the useless corners and sub-standard skins according to the quality of the skin, which is called bare skin; soaking: put 800kg of bare skin into the water drum Add warm water of 30% of the weight of the bare hide to the water drum to soak the bare hide; start the drum after soaking for 20 minutes to allow the bare hide to absorb water more evenly; 1% sulfuric acid, 5% formic acid, 3% degreasing agent and 5% chromium powder, and then start the drum to work for 60 minutes. Remixing: After the drum is closed, add 0.1% dye and 1% soda into it, and then start the drum for 60 minutes of tanning. Re-blending: After the drum is closed, 10% fatliquoring agent and 3% soda are added into it, and the drum is started to continue tanning for 90 minutes. Reinforcing color agent: add 2% color fixing agent to the drum to fix the color, turn on the drum for 20 minutes; semi-finished product: after closing t...

Embodiment 3

[0042]Skin repair: Workers put the original wet blue skin on the workbench, and remove the useless corners and sub-standard skins according to the quality of the skin, which is called bare skin; soaking: put 800kg of bare skin into the water drum In the water drum, add warm water of 50% of the weight of the bare hide to soak the bare hide; after soaking for 30 minutes, start the drum to allow the bare hide to absorb water more evenly; initial kneading: turn off the drum, add diluted 5% sulfuric acid, 15% formic acid, 10% degreasing agent and 15% chromium powder, and then start the drum to work for 90 minutes. Remixing: After the drum is closed, add 0.5% dye and 2% soda into it, and then start the drum for 90 minutes of tanning. Re-blending: After the drum is closed, 15% fatliquoring agent and 5% soda are added into it, and the drum is started to continue tanning for 120 minutes. Reinforcing color agent: add 10% color fixing agent to the drum to fix the color, turn on the drum...

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PUM

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Abstract

The invention discloses a pollution-free leather manufacturing technology. The pollution-free leather manufacturing technology includes the steps of leather finishing, leather soaking, preliminary tanning, secondary tanning, repeated secondary tanning, tanning finishing, dye-fixing agent adding, semi-finished product manufacturing, softening and finished product manufacturing. In the leather soaking step, the water volume for soaking naked leather accounts for 30% to 50% of the mass of the naked leather, and soaking time ranges from 20 min to 30 min. In addition, the ratios of solutions added to a drum are adjusted in proportion in the steps, and the rotation time of the drum is controlled. Thus, by the adoption of the pollution-free leather manufacturing technology, the use ratio of water to auxiliary materials is strictly controlled, all liquid is completely absorbed by leather, no sewage is drained, and no pollution is generated to the environment.

Description

technical field [0001] The invention relates to the technical field of tanning technology, in particular to a pollution-free tanning technology. Background technique [0002] Tanning refers to the process of tanning raw hides and skins into leather. Remove hair and non-collagen fibers, etc., make the collagen fibers in the dermis moderately loose, fix and strengthen, and then add a series of chemical (including biochemical) and mechanical treatments such as finishing (management). The tanning process is usually divided into three stages: preparation, tanning and finishing (reasoning). The drum is the most used equipment in the tanning process. The processes of immersion, liming, depilation, softening, pickling, tanning, dyeing, emulsion oiling and other processes must be completed in the drum. Through the mechanical action of the drum, various chemical industries are promoted. The uniform penetration of the material completes the chemical action of the preparation on the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14B1/02C14C1/04C14C3/28C14B1/58D06P5/02
CPCC14B1/02C14B1/42C14B1/58C14B11/00C14B2700/01C14B2700/27C14C1/04C14C3/02C14C3/04C14C3/28C14C5/00C14C9/02D06P5/02
Inventor 林善溪
Owner 林善溪
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