Chrome-free tanning method of alligator skin

A chrome-free tanning technology for crocodile skin, which is applied in the field of chrome-free tanning of crocodile skin, can solve the problem of destroying the glossiness of the grain surface of crocodile skin, the square concave-convex texture, the difficulty in combining organic phosphonium salt tanning agents with crocodile skin, and the grain surface of crocodile skin. Abrasion and other problems, to achieve good tanning effect, good gloss, pure white color effect

Inactive Publication Date: 2014-03-12
广西盟展鳄鱼科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adopt existing method to tan crocodile skin with organic phosphonium salt, there is the penetrability of organic phosphonium salt tanning agent in crocodile skin poor, the problem that organic phosphonium salt tanning agent combines with crocodile skin is difficult, in order to strengthen organic phosphonium salt in tanning process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] This embodiment is implemented in a rotating drum, and the process steps are as follows:

[0027] (1) The preservatively treated crocodile skin is subjected to meat removal, water immersion, scale removal, liming, non-ammonium salt deliming, bleaching, softening, and acid pickling to obtain the crocodile skin blank according to the conventional process. When the pickling treatment is completed, soak The pH of the acid is 2.4;

[0028] (2) Add 100kg of water and 6kg of sodium chloride into the drum, rotate the drum to dissolve the sodium chloride completely, then add 100kg of pickled crocodile skin obtained in step (1), rotate the drum for 5 minutes, and then rotate the drum Add NaHCO with a concentration of 50g / L in 2 times (15min interval) under the condition of 3 Adjust the pH value of the mixed liquid in the drum to 3.5 with the aqueous solution;

[0029] (3) Add organic phosphine salt tanning agent FCC 3.5 kg, monoethanolamine 0.5 kg, and glutaraldehyde ...

Example Embodiment

[0034] Example 2

[0035] This embodiment is implemented in the scribe groove, and the process steps are as follows:

[0036] (1) The preservatively treated crocodile skin is subjected to meat removal, water immersion, scale removal, liming, non-ammonium salt deliming, bleaching, softening, and acid pickling to obtain the crocodile skin blank according to the conventional process. When the pickling treatment is completed, soak The pH of the acid is 2.0;

[0037] (2) Add 300kg of water and 12kg of sodium chloride into the scoring slot, move the scoring board of the scoring slot to completely dissolve the sodium chloride, and then add 100kg of pickled crocodile skin obtained in step (1), rotate for 10 minutes, and then scratch Add NaHCO with a concentration of 100g / L in 2 times (15min interval) under the condition of moving the paddle 3 Adjust the pH value of the mixed solution in the groove to 3.7 with the aqueous solution;

[0038] (3) Add 4.0 kg of organic phosphine salt tanning age...

Example Embodiment

[0043] Example 3

[0044] This embodiment is implemented in a rotating drum, and the process steps are as follows:

[0045] (1) The preservatively treated crocodile skin is subjected to meat removal, water immersion, scale removal, liming, non-ammonium salt deliming, bleaching, softening, and acid pickling to obtain the crocodile skin blank according to the conventional process. When the pickling treatment is completed, soak The pH of the acid is 1.6;

[0046] (2) Add 120kg of water and 8kg of sodium chloride into the drum, rotate the drum to completely dissolve the sodium chloride, then add 100kg of the soaked crocodile skin obtained in step (1), rotate the drum for 10 minutes, and then rotate the drum Add NaHCO with a concentration of 100g / L in 3 times (15min interval) under the condition of 3 Adjust the pH value of the mixed liquid in the drum to 3.4 with the aqueous solution;

[0047] (3) Add 4.0 kg of organic phosphine salt tanning agent PCC, 1.0 kg of isopropanolamine, and 0.4 ...

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PUM

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Abstract

The invention provides a chrome-free tanning method of alligator skin. The chrome-free tanning method comprises the following steps of (1) adding water and sodium chloride to a rotary drum or a paddle vat, adding a pickling alligator skin blank after the sodium chloride is dissolved, rotating the rotary drum or paddling a paddle plate for 5-10 minutes, and regulating the pH value of a mixed solution inside the rotary drum or the paddle vat to 3.4-3.7; (2) adding an organic phosphonium salt tanning agent, an alcamines compound and fatty aldehyde to the rotary drum or the paddle vat, then rotating the rotary drum or paddling the paddle plate for 10-20 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing till the alligator skin blank is fully impregnated; (3) regulating the pH value of the mixed solution inside the rotary drum or the paddle vat to 5.8-6.2, then rotating the rotary drum or paddling the paddle plate for 5-10 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing for 3-5 times, then standing for 6-12 hours, and then completely discharging the mixed solution; (4) adding the water and an oxidizing agent to the rotary drum or the paddle vat, then rotating the rotary drum or paddling the paddle plate for 5-10 minutes, standing for 30-60 minutes, and repeating the operation of rotating the rotary drum or paddling the paddle plate and standing for 3-5 times.

Description

technical field [0001] The invention belongs to the field of crocodile skin tanning, in particular to a chrome-free tanning method of crocodile skin. Background technique [0002] Alligator leather can be called "platinum" in leather. Its natural gradient grid texture gives it a unique appearance. Alligator leather is strong and has a good luster. It is a rare, precious and special leather raw material. The tanning process of crocodile skin is to process crocodile skin through fleshing, soaking, descaling, liming, deliming, softening, bleaching, pickling, tanning, neutralization, retanning, dyeing, fatliquoring, and finishing operations. Made into leather. At present, enterprises mainly use chrome tanning agent to tan crocodile skin. During the tanning process, the chrome tanning agent is not fully absorbed by the crocodile skin blank. After tanning, about 10% of chromium enters the wastewater, and the chromium-containing wastewater will cause great harm to the environment....

Claims

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Application Information

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IPC IPC(8): C14C3/08
Inventor 陈孙福张宗才李敏李龙
Owner 广西盟展鳄鱼科技开发有限公司
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