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Dermal collagen fiber prepared from tanning chromium-containing subsidiary waste

A collagen fiber and waste technology, which is applied to the field of dermal collagen fiber and its preparation, can solve the problems that the fiber length is not fully reached, restrict the recycling of chromium-containing by-wastes, and limit the application field, and achieve easy industrial production and significant ecological benefits. , Conditionally controllable effects

Inactive Publication Date: 2013-11-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The existing technology has certain restrictions on the source of chromium-containing by-waste, and many chromium-containing by-waste cannot be effectively utilized, so it is impossible to realize the complete digestion of chromium-containing by-waste;
[0006] 2. Using the existing technology to process chromium-containing secondary waste, the length of the obtained fiber cannot fully reach more than 25 mm, and the application field is greatly restricted, which restricts the recycling of chromium-containing secondary waste;
[0007] 3. The existing technology of defibrillation has not yet achieved industrialization and commercialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Weighing: Accurately weigh the chromium-containing secondary waste from tanning (hereinafter referred to as secondary waste) as the basis for the calculation of the following processes.

[0041] 2. Softening, acidification, enzyme treatment: (1) Technical requirements: water 50%, initial internal temperature: normal temperature, penetrant JFC 0.1%, oxalic acid 1.0%, compound enzyme skin collagen treatment agent F 0.10%. (2) Operation method: After adjusting the liquid ratio and internal temperature, add penetrant JFC and oxalic acid, rotate for 10 minutes, add compound enzyme skin collagen treatment agent F, rotate for 30 minutes, stop for 10 minutes, rotate for 10 minutes, open the drum to check, the end point pH= 2.4±, internal temperature ≤40℃.

[0042] 3. Neutralization: (1) Technical requirements: 50% water, 30°C internal temperature, 0.5% baking soda. (2) Operation method: After adjusting the liquid ratio and internal temperature, add baking soda, rotate for 3...

Embodiment 2

[0055] 1. Weighing: Accurately weigh the chromium-containing secondary waste from tanning (hereinafter referred to as secondary waste) as the basis for the calculation of the following processes.

[0056] 2. Softening, acidification, enzyme treatment: (1) Technical requirements: water 120%, initial internal temperature: normal temperature, penetrant JFC 0.3%, oxalic acid 3.0%, compound enzyme skin collagen treatment agent F 0.30%. (2) Operation method: After adjusting the liquid ratio and internal temperature, add penetrant JFC and oxalic acid, rotate for 30 minutes, add compound enzyme skin collagen treatment agent F, rotate for 60 minutes, stop for 40 minutes, rotate for 40 minutes, open the drum to check, the end point pH= 2.4±, internal temperature ≤40℃.

[0057] 3. Neutralization: (1) Technical requirements: 120% water, 38°C internal temperature, 1.0% baking soda. (2) Operation method: After adjusting the liquid ratio and internal temperature, add baking soda, rotate for...

Embodiment 3

[0070] 1. Weighing: Accurately weigh the chromium-containing secondary waste from tanning (hereinafter referred to as secondary waste) as the basis for the calculation of the following processes.

[0071] 2. Softening, acidification, enzyme treatment: (1) Technical requirements: water 200%, initial internal temperature: normal temperature, penetrant JFC 0.5%, oxalic acid 5.0%, compound enzyme skin collagen treatment agent F 0.40%. (2) Operation method: After adjusting the liquid ratio and internal temperature, add penetrant JFC and oxalic acid, rotate for 40 minutes, add compound enzyme skin collagen treatment agent F, rotate for 90 minutes, stop for 60 minutes, rotate for 60 minutes, open the drum to check, the end point pH= 2.4±, internal temperature ≤40℃.

[0072] 3. Neutralization: (1) Technical requirements: 200% water, 45°C internal temperature, 1.5% baking soda. (2) Operation method: After adjusting the liquid ratio and internal temperature, add baking soda, rotate for...

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Abstract

The invention discloses a dermal collagen fiber prepared from tanning chromium-containing subsidiary waste and a preparation method thereof. In the preparation method, the tanning chromium-containing subsidiary waste is used as a raw material, is subjected to processing of puffing, separating fibers, splitting fibers and carding and the like by a physical, chemical and biochemical combination method on the premise of ensuring unchanged good physical and mechanical conditions of collagen fibers, and is prepared into the dermal collagen fiber with good performance and wide application ranges. The dermal collagen fiber reaches the following technical indexes: (1) the outer surface is provided with light blue fiber materials and does not have visible impurities; (2) the moisture content is between 18 and 25 percent; (3) the linear density is between 1.2 and 2.0 dtex; (4) the fiber length is between 20 and 30mm; (5) the breaking strength is more than or equal to 3.5 cN / tex; (6) the elongation at break is between 10 and 30 percent; and (7) the moisture regain is between 6 and 10 percent. The dermal collagen fiber can be used as raw materials of high-simulation leather (automobile seat leather, furniture leather, instep leather, garment leather, shoe lining leather, belt leather, luggage leather and the like), natural leather base cloth, senior carpets, senior wall paper, dermal fiber bedding and the like.

Description

technical field [0001] The invention relates to a leather collagen fiber prepared by using chromium-containing by-products of tanning and a preparation method thereof, belonging to the field of light industry and textiles. Background technique [0002] Chromium by-products from tanning is one of the long-term unresolved public hazards in the tanning industry. For more than 100 years, chrome tanning has dominated the tanning industry. Some data show that in the process of tanning, about 30% of the raw hides become chromium-containing by-products (Nie Linshan, Qiang Xihuai, Zhang Chuanbo. Progress in the treatment of tannery by-waste[J]. Environmental pollution and Control. 2001, 23(5): 268-270). my country's current leather output accounts for 20-25% of the world's total, and is mainly split blue wet leather. It is estimated that about 500,000-700,000 tons (wet weight) of chromium-containing by-products are produced every year (Lin Wei, Mu Changdao , Zhang Mingrang. Recycli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/02D01G11/04D01C3/00D01C3/02
CPCY02W30/66
Inventor 但卫华胡杨周华龙但年华叶光斗李建新
Owner SICHUAN UNIV
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