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Physical degumming method of ramie

A degumming method and physical technology, applied in mechanical treatment, fiber treatment, textile and paper making, etc., can solve the problem of high degumming cost, achieve the effects of reducing degumming cost, improving degumming uniformity, reducing energy consumption and cost

Inactive Publication Date: 2005-06-08
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing degumming strains have strong enzyme production ability, the enzyme activity of hemicellulase and ligninase is relatively high, degumming can be done directly by adding bacteria to degumming, or making primary enzyme solution (compound enzyme) for degumming, which can complete degumming at one time After fermentation, it is not necessary to carry out chemical post-treatment similar to ramie bacterial chemical degumming, which simplifies the degumming process and has important production and application value, but these degumming methods still need to increase a complete set of equipment such as strain selection, preservation, purification and expanded cultivation. , the cost of degumming is still high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0025] [Example 2] The fresh hemp of the "Tril" variety that has been scraped is mechanically beaten and rinsed with clean water, and soaked in a pool. The water source is taken from pond water without chemical pollution. The water temperature is 32-35°C and the pH is 7.0. , The weight bath ratio is 1:20, the soaking time is 3 days, mechanically beat and washed again, and then under the conditions of high pressure (0.2-0.3Mpa) and high temperature (130-140°C), take it out after continuous scouring for 3 hours, and mechanically again Beat and rinse with clean water, and then carry out degumming post-processing. After testing, the degree of fiber separation is 99.5%, and the residual glue rate is 3.9%.

example 3

[0026] [Example 3] Soak the raw hemp (commercial dry hemp) of the "Xiangzhu No. 3" variety in a pool, and the water source is taken from a river without chemical pollution. Soak for 6 days under the same conditions; take out the soaked ramie, beat and wash by hand, then soak in warm water for the second time, the water source is from the river water without chemical pollution, the soaking water temperature is 32-35°C, pH7. 20. The soaking time is 3 days, and it is taken out again for manual beating, rinsing with clean water and degumming post-treatment. After testing, the average degree of fiber separation is 91.7%, and the average residual glue rate is 9.7%.

example 4

[0027] [Example 4] Soak the raw hemp of the "Xiangzhu No. 3" variety in a pond, the water source is taken from a pond without chemical pollution, and soak and ferment in pond water at 32-35°C, pH 7.0, and a weight-to-bath ratio of 1:20 After 9 days, take it out, beat it mechanically and rinse it with clean water, and then soak it in warm water for the second time. The water source is taken from a pond without chemical pollution. After 3 days, it was taken out again for mechanical beating, water rinsing and degumming post-treatment. After testing, the average degree of fiber separation is 98.3%, and the average residual glue rate is 4.1%.

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PUM

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Abstract

This invention relates to a method of degumming Boehmeria nivea. The process is: fresh Boehmeria nivea (or commercial original Boehmeria nivea) ->immersion in warm water-> mechanical hemp knocking and washing ->boiling off in hyperthermia and heavy pressure (or immersion in warm water) -> mechanical hemp knocking and washing -> refined dry hemp. This method, assuming the characteristics of environmental protection, high efficiency and high qualities, greatly reduces the degumming cost, avoids the pollution of strong acid and strong base in waste solution to the environment, for this process makes use of existing machinery of degumming. Instead of using such chemical materials as strong acid and strong base, the method is high-temp high-pressure cooking, immersion in warm water, mechanical beating and washing for removing extraneous cells of Boehmeria nivea liber.

Description

technical field [0001] The invention relates to a physical degumming method for ramie, which belongs to the technical field of ramie primary processing. Background technique [0002] Ramie fibers are distributed in the phloem tissue of the hemp stem, and a large number of phloem parenchyma cells, sieve tubes, and companion cells are distributed around the fiber cells. In addition to cellulose, ramie raw hemp also contains varying amounts of pectin, water-soluble matter, hemicellulose, lignin and wax. Therefore, from the perspective of cytology, ramie colloid is the non-fibrous cell in ramie bast, and from the analysis of chemical components, ramie colloid is the non-cellulose substance in the bast fiber cell. The essence of ramie degumming is to destroy and remove parenchyma cells, sieve tubes, companion cells and other miscellaneous cells in bast. In other words, ramie degumming is to remove hemicellulose, lignin, pectin, water-soluble substances in bast fiber cells And o...

Claims

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Application Information

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IPC IPC(8): D01B9/00
Inventor 孙焕良周清明唐升斌谢达平孟桂元李煊星王孔俭
Owner HUNAN AGRICULTURAL UNIV
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