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Low-chromium high-absorption tanning method

A high absorption, tanning technology, applied in chemical treatment before tanning, small raw hide/large raw hide/leather/fur treatment, leather impregnation, etc., can solve the problems of high cost, high power consumption, long process cycle, etc. Absorption and utilization, the effect of ensuring tanning effect and reducing the amount of chromium

Pending Publication Date: 2022-02-25
河北省皮革研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are following defects in the above-mentioned technology; 1, produce a large amount of chromium-containing wastes-chrome leather shavings in the smoothing process, and the processing mode for chrome leather shavings at present is to bury it, and this mode not only takes up land resources, but also brings Environmental pollution is coming; 2. This process produces a large amount of industrial waste water, causing serious pollution to rivers and agriculture; 3. The whole process consumes a lot of water, high power consumption, long process cycle and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. A low chromium high absorption tanning method, which includes the following steps:

[0034] Step 1. Weighing meter: Raw material is referred to as subsequent water, brush, water washing, pre-gray, deprive, softening, dip acid, and tanning.

[0035] Step 2, immerse water: Add water without raw material skin to the original skin, add 0.4% water additive, 0.2% degreasing agent, 0.15% fungicide, 0.4% sodium carbonate, normal temperature 20- 30min, stop 40 min, then turn 10 min, stop 50 min, circulate 12 times, remove meat, dirt and preservatives on the raw skin.

[0036] Step 3, pouring the grafting: add 0.8 to 10 water to the drum, add 0.5% of the french auxiliary agent, 0.1% degreasing agent, rotate 30-40 min, add 0.5% lime, rotate 30-40 min; 0.5% of the hair removal enzyme preparation, then rotate for 45min, stop for 45min, circulating three times, filtration; 0.5% sodium sulfide, 0.5% lime, rotate 10-15 min, stop 50 min, add 0.2% vulcanization Sodium, 0.5% lime, 10-20 mi...

Embodiment 2

[0045] 1. A low chromium high absorption tanning method, which includes the following steps:

[0046] Step 1. Weighing meter: Raw material is referred to as subsequent water, brush, water washing, pre-gray, deprive, softening, dip acid, and tanning.

[0047] Step 2, immerse water: Add water without raw material skin to the original skin, add 0.4% water additive, 0.2% degreasing agent, 0.15% fungicide, 0.4% sodium carbonate, normal temperature 20- 30min, stop 40 min, then turn 10 min, stop 50 min, circulate 12 times, remove meat, dirt and preservatives on the raw skin.

[0048] Step 3, pouring the grafting: add 0.8 to 10 water to the drum, add 0.5% of the french auxiliary agent, 0.1% degreasing agent, rotate 30-40 min, add 0.5% lime, rotate 30-40 min; 0.5% of the hair removal enzyme preparation, then rotate for 45min, stop for 45min, circulating three times, filtration; 0.5% sodium sulfide, 0.5% lime, rotate 10-15 min, stop 50 min, add 0.2% vulcanization Sodium, 0.5% lime, 10-20 mi...

Embodiment 3

[0057] 1. A low chromium high absorption tanning method, which includes the following steps:

[0058] Step 1. Weighing meter: Raw material is referred to as subsequent water, brush, water washing, pre-gray, deprive, softening, dip acid, and tanning.

[0059] Step 2, immerse water: Add water without raw material skin to the original skin, add 0.4% water additive, 0.2% degreasing agent, 0.15% fungicide, 0.4% sodium carbonate, normal temperature 20- 30min, stop 40 min, then turn 10 min, stop 50 min, circulate 12 times, remove meat, dirt and preservatives on the raw skin.

[0060] Step 3, pouring the grafting: add 0.8 to 10 water to the drum, add 0.5% of the french auxiliary agent, 0.1% degreasing agent, rotate 30-40 min, add 0.5% lime, rotate 30-40 min; 0.5% of the hair removal enzyme preparation, then rotate for 45min, stop for 45min, circulating three times, filtration; 0.5% sodium sulfide, 0.5% lime, rotate 10-15 min, stop 50 min, add 0.2% vulcanization Sodium, 0.5% lime, 10-20 mi...

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PUM

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Abstract

The invention provides a low-chromium high-absorption tanning method. The low-chromium high-absorption tanning method comprises the following steps: step 1, weighing and metering: weighing raw material leather as a material metering basis for subsequent procedures of soaking, liming, washing, pre-deliming, deliming, softening, pickling, tanning and the like; step 2, soaking: adding water which submerges the raw leather into the raw leather; step 3, liming; step 4, washing with water; step 5, pre-deliming; step 6, deliming and softening: adding 0.5-1 time of 30 DEG C water, adding 0.8% of a deliming agent and 0.2% of a degreasing agent, adding sulfuric acid to adjust the pH value to 3.5, and adding 0.5% of softening compound enzyme and 0.5% of an auxiliary agent; step 7, pickling and tanning: adding 1.5% of a pickling aid, rotating for 60-90 minutes, adding 2-3% of a chrome tanning agent, rotating for 60-90 minutes, adding 1-1.5% of a tanning aid, and rotating for 60-90 minutes; the method has the characteristics of reducing environmental pollution and ensuring that the quality index of a finished product is not reduced.

Description

Technical field [0001] The present invention relates to the field of leather cleaning production, and in particular, to a low chromium high absorption tanning method. Background technique [0002] Leather is a physique such as hair removal and tanning, and the chemical processed is not easy to rot. Leather tanning material refers to the ability to interact with the raw rubber fiber, thereby increasing the stability of the lens fiber bundle, and transforming the raw skin into the leather, so that a higher humid thermal stability leather chemical material. Leather tanning materials are the most critical type of chemical material in the tangent industry, and the performance of its performance has directly determined the quality of the prepared leather. The tanning agent is a tanning effect in the tangent industry, thereby transforming the chemical materials of the raft. Chromium Tangers are the most widely used tanning agent due to its excellent leather performance. However, in the ...

Claims

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Application Information

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IPC IPC(8): C14C1/04C14C1/06C14C1/08C14C3/06C14C3/28C14C9/02
CPCC14C1/04C14C1/06C14C1/08C14C3/06C14C3/28C14C9/02
Inventor 银德海谢胜虎猛力闯郑士良
Owner 河北省皮革研究院
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