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Preparation method of hemp fibers in cotton industry

A technology for hemp fiber and chemical industry, which is applied to the field of efficient and environmentally friendly preparation of cotton chemical industrial hemp fiber, can solve the problems of low degumming rate of biological enzyme degumming method, large alkali consumption of chemical degumming method, large environmental pollution, etc., and achieves less damage. , Conducive to environmental protection and sewage treatment, the effect of small dosage

Pending Publication Date: 2022-07-15
QIQIHAR UNIVERSITY
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AI Technical Summary

Problems solved by technology

The chemical degumming method consumes a lot of alkali and pollutes the environment; the physical degumming method is mainly mechanical degumming, which can only remove part of the gum, so it is often used as an auxiliary method; the biological enzyme degumming method uses different enzymes with specificity and high efficiency. The characteristics of removing the external glue of the fiber, the combined use of multiple enzymes is better, but the degumming rate of the biological enzyme degumming method is low and takes a long time

Method used

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  • Preparation method of hemp fibers in cotton industry
  • Preparation method of hemp fibers in cotton industry
  • Preparation method of hemp fibers in cotton industry

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preparation example Construction

[0024] The embodiment of the present invention provides a preparation method of cotton chemical industrial hemp fiber, comprising the following steps:

[0025] 1) immersion in electrolyzed water is carried out by hemp two thick or combed noil, and the electrolyzed water adopts sodium chloride as electrolyte;

[0026] 2) Degumming with compound enzyme and washing with water;

[0027] 3) Chlorine dioxide is bleached, washed with water and dried.

[0028] In some embodiments of the present invention, the electrolyzed water adopts sodium chloride as the electrolyte, the electrolyte concentration is 25~35g / L, the current intensity is 1A~3A, the voltage is 8V~12V, and the electrolysis is obtained for 40~60min. water.

[0029] In some embodiments of the present invention, step 1) is: soak the second coarse hemp or combed noil in water for 10-20 minutes, take out and squeeze out excess water, and put it in at a liquor ratio (mass ratio) of 1:50-150. Soak in electrolyzed water for 3...

Embodiment 1

[0038] An efficient and environmentally friendly preparation method for cotton chemical industrial hemp fiber, comprising the following steps:

[0039] 1) Soak in electrolyzed water

[0040] The conditions are: first, sodium chloride is used as the electrolyte, the electrolyte concentration is 25g / L, the current intensity is 3A, the voltage is 12V, and the electrolyzed water is obtained by electrolysis for 60min. Then soak the cannabis second crude in water for 20min, take out and squeeze out the excess water, put it in electrolytic water at a liquor ratio of 1:50, soak it for 50min, and wash it with water until the pH value is neutral.

[0041] 2) Further degumming with complex enzymes

[0042] The conditions are as follows: the compound enzyme adopts fruit enzyme, laccase and hemicellulase, the ratio of compound enzyme is 1:1:1, the concentration of compound enzyme is 20g / L, the enzyme reaction temperature is 40℃, the enzyme reaction time is 3h, the bath The ratio is 1:20,...

Embodiment 2

[0046] An efficient and environmentally friendly preparation method for cotton chemical industrial hemp fiber, comprising the following steps:

[0047] 1) Soak in electrolyzed water

[0048] The conditions are as follows: firstly, sodium chloride is used as the electrolyte, the electrolyte concentration is 35g / L, the current intensity is 2A, the voltage is 10V, and electrolyzed water is obtained by electrolysis for 40min. Then soak the cannabis second crude in water for 20min, take out and squeeze out the excess water, put it in electrolytic water at a liquor ratio of 1:60, soak it for 40min, and wash it with water until the pH value is neutral.

[0049] 2) Further degumming with complex enzymes

[0050]The conditions are: fruit enzyme, laccase and hemicellulase are used as compound enzymes, the ratio of compound enzymes is 2:1:1, the concentration of compound enzymes is 30g / L, the enzyme reaction temperature is 50°C, the enzyme reaction time is 2h, and the bath The ratio is...

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Abstract

The invention relates to a method for preparing hemp fibers in cotton industry, which comprises the following steps of: 1) soaking second coarse hemp or combed noil in electrolyzed water which adopts sodium chloride as electrolyte; 2) degumming and washing with compound enzyme; and 3) bleaching with chlorine dioxide, washing with water, and drying. Compared with a traditional process, the method has the advantages that the damage to secondary coarse or combed noil of hemp is small, and the degumming period is shortened while the quality of the hemp fibers in the cotton chemical industry is improved. The electrolyzed water and the chlorine dioxide are applied to degumming and bleaching second coarse hemp or combed noil fibers, and compared with a traditional process, the method has the advantages that the dosage of chemical reagents is small, the process is safe, pollution to the environment is small, and environmental protection and sewage treatment are better facilitated.

Description

technical field [0001] The invention belongs to the technical field of textile processing, and in particular relates to an efficient and environmentally friendly preparation method for cotton chemical industrial hemp fibers. Background technique [0002] During the textile processing of industrial hemp, two coarse hemp and combed noil are produced. In order to make full use of it, China has initially explored the process route of hemp noil spinning and the solutions to technical difficulties. At present, the product count of pure hemp spinning is low. Due to the characteristics of hemp itself and the limitations of current degumming technology, it is difficult to increase the yarn count only by optimizing process parameters. If you want to develop high-count hemp yarn products, the second coarse hemp fiber and noil fiber can be cottonized to obtain hemp fiber that can be spun on cotton spinning equipment; such fibers can be spun purely on cotton spinning equipment or can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/00
CPCD01C1/00
Inventor 孙颖李端鑫郑永杰于洋胡悦孔令苹
Owner QIQIHAR UNIVERSITY
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