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Method for performing one bath of ramie fiber preparation and chemical modification

A technology of ramie fiber and chemical modifier, which is applied in fiber treatment, chemical production of bast fiber, textiles and papermaking, etc. It can solve the problems of long chemical degumming process, long microbial degumming time, excessive fiber strength damage, etc. , to improve the spinnability, save the washing process and reduce the initial modulus

Active Publication Date: 2013-08-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microbial degumming takes a long time, degumming is not complete, and the quality of dry hemp is unstable
The chemical degumming process is long, consumes a lot of energy, causes a lot of pollution, and requires strong acid pretreatment. High-concentration strong alkali and high-temperature and high-pressure scouring will cause excessive damage to the fiber strength and the production rate is too low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method of ramie fiber preparation and chemical modification carried out in the same bath is as follows:

[0031] 1.0 kg of hydrogen peroxide, 0.4 kg of sodium tripolyphosphate, 0.2 kg of urea, 0.3 kg of sodium salicylate, 0.1 kg of sodium dodecylbenzenesulfonate, and 98.0 kg of water were added to form a degumming solution. Dip 10 kg of ramie raw material into the degumming solution. Start heating from room temperature, rise to 70°C within half an hour, and keep at this temperature for 60 minutes. Then the temperature was raised to 90°C, 0.2 kg of caustic soda and 0.4 kg of sec-butanol were added, and the temperature was kept at this temperature for 70 minutes. Wash with water, oil and dry. The fineness of the chemically modified ramie fiber for textile was measured to be 1599 metric, the finished rate was 76.92%, the breaking strength was 61.79cN, and the breaking elongation was 3.42%.

[0032] Compared with the existing traditional degumming process in the rami...

Embodiment 2

[0040] The method of ramie fiber preparation and chemical modification carried out in the same bath is as follows:

[0041] 0.8 kg of sodium percarbonate, 0.3 kg of sodium tripolyphosphate, 0.3 kg of urea, 0.2 kg of sodium benzoate, 0.1 kg of fatty alcohol polyoxyethylene ether (JFC), add 98.3 kg of water to make a degumming solution, and 10 kg of ramie raw materials are immersed in the degumming solution middle. Start to heat up from room temperature, rise to 80°C within half an hour, and keep at this temperature for 50 minutes. Then the temperature was raised to 95°C, 0.3 kg of caustic soda and 0.3 kg of tert-butanol were added, and the temperature was kept at this temperature for 80 minutes. Wash with water, oil and dry. The measured fineness is 1572 metric, the finished rate is 78.51%, the breaking strength is 59.69cN, and the breaking elongation is 3.48%.

Embodiment 3

[0043] The method of ramie fiber preparation and chemical modification carried out in the same bath is as follows:

[0044] 1.0 kg of potassium persulfate, 0.3 kg of sodium tripolyphosphate, 0.1 kg of urea, 0.2 kg of resorcinol, 0.15 kg of polyvinyl alcohol, add 98.25 kg of water to make a degumming solution, and 10 kg of ramie raw materials are immersed in the degumming solution. Start heating from room temperature, rise to 85°C within half an hour, and keep at this temperature for 45 minutes. Then the temperature was raised to 100°C, 0.3 kg of caustic soda and 0.4 kg of isopropanol were added, and the temperature was kept at this temperature for 90 minutes. Wash with water, oil and dry. The measured fineness is 1601 metric, the finished rate is 75.12%, the breaking strength is 59.01cN, and the breaking elongation is 3.53%.

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Abstract

The invention provides a method for performing one bath of ramie fiber preparation and chemical modification. The method comprises the steps of: firstly, blending peroxide, sodium tripolyphosphate, urea, peroxide stabilizer, a penetrant and water into degumming solution; then mixing raw ramie with the degumming solution according to the mass ratio of 1:1, increasing the temperature and holding the temperature, and removing a part of gum; and finally, adding chemical modifier into the raw ramie and degumming solution mixture, increasing the temperature, boiling off, thoroughly removing gum to obtain the chemically modified textile ramie fibers. The method overcomes the deficiencies of the prior art, is simple in flow process, the original three procedures are combined into one bath solution, so that the total reaction time is shortened, the washing procedure in the middle link can be omitted, the energy consumption can be greatly reduced, the pull rate is improved, the breaking strength, the breaking elongation rate, the flexibility, fineness properties of the special ramie fibers can be obviously improved, and the performance index can achieve the ramie spinning requirement.

Description

technical field [0001] The invention relates to a method for preparing and chemically modifying ramie fibers in the same bath, and belongs to the technical field of degumming and chemically modifying processes in the field of textiles. Background technique [0002] Ramie fiber has good wearability and is an excellent textile raw material. The main component of ramie raw material is cellulose, besides, there are many colloids such as hemicellulose, pectin, lignin, water soluble matter, etc., and the colloids in the raw hemp must be removed before spinning. [0003] Ramie degumming methods mainly include microbial degumming and chemical degumming. Microbial degumming can be divided into three types: traditional microbial degumming, bacterial degumming and biological enzyme degumming. Microbial degumming takes a long time, the degumming is not complete, and the quality of dry hemp is unstable. The chemical degumming process is long, consumes a lot of energy, causes a lot of ...

Claims

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Application Information

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IPC IPC(8): D01C1/02D06M15/53D06M13/262
Inventor 李召岭郁崇文杨建平李世刚黄卫平张元明
Owner DONGHUA UNIV
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