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Frozen-irradiated auxiliary degumming process for china-hemp fibers

A hemp fiber and fiber technology, which is applied in the field of hemp fiber freezing and radiation-assisted degumming technology, can solve the problems of high residual glue rate, low whiteness and softness, unsatisfactory lignin removal effect, etc., and achieve improved wearing performance, The effect of length and fineness improvement

Inactive Publication Date: 2010-06-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a hemp fiber freezing and radiation-assisted degumming process to solve the problems of high residual glue rate, unsatisfactory lignin removal effect and low whiteness and softness in the existing hemp degumming process. and other issues; the second purpose is that the treated hemp meets the requirements of the national first-class product and meets the needs of textile finishing technology

Method used

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  • Frozen-irradiated auxiliary degumming process for china-hemp fibers
  • Frozen-irradiated auxiliary degumming process for china-hemp fibers
  • Frozen-irradiated auxiliary degumming process for china-hemp fibers

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Embodiment approach 1

[0039] The detailed process step of hemp fiber freezing radiation assisted degumming process of the present invention is as follows:

[0040] 1. Hot water bath treatment

[0041] At 80°C, completely soak the fiber with deionized water (the concentration of the fiber in the solution is 25g / L) for 100min, and use a stirrer to stir clockwise / counterclockwise every 10min to make it soak evenly. Wash several times with water until the pH value of the soaking solution is 7.

[0042] 2. Pre-soaking treatment

[0043] At 60°C, use dilute sulfuric acid with a concentration of 9.8g / L to completely soak Gansu hemp raw hemp (the concentration of fiber in the solution is 25g / L) for 100min, and alternately stir clockwise / counterclockwise every 10min to make it soak evenly. Wash several times with water until the pH value of the soaking solution is 7.

[0044] 3. Pre-chlorination treatment

[0045] At room temperature, adjust the pH value to 4, use sodium hypochlorite with an available c...

Embodiment approach 2

[0058] According to the process method of embodiment 1, the difference of embodiment 2 is:

[0059] 1. During UV radiation, the concentration of hydrogen peroxide is 10g / L, the concentration of sodium hydroxide is 10g / L, the concentration of magnesium sulfate is 3g / L, the wavelength of ultraviolet radiation is 280nm, and the radiation time is 30min.

[0060] 2. During alkaline oxygen scouring, the scouring time is 150min, the scouring temperature is 100°C, the stirrer speed is 150r / min, and the stirring method is alternating clockwise / counterclockwise every 30min.

[0061] 3. During the second scouring, add 20g / L nano softener MS-2 for hemp.

Embodiment approach 3

[0063] According to the process method of embodiment 1, the difference of embodiment 3 is:

[0064] 1. During UV radiation, the concentration of hydrogen peroxide is 14g / L, the concentration of sodium hydroxide is 14g / L, the concentration of magnesium sulfate is 4g / L, the wavelength of ultraviolet radiation is 350nm, and the radiation time is 50min.

[0065] 2. During alkaline oxygen scouring, the scouring time is 200min, the scouring temperature is 120°C, the speed of the agitator is 200r / min, and the stirring method is alternating clockwise / counterclockwise every 20min.

[0066] 3. When scouring for the second time, add 40g / L strong soft flake soft T20 for textile use.

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Abstract

The invention discloses a hemp fiber freezing radiation auxiliary de-gumming technique, comprising the following steps of undergoing UV radiation, quenching, and heating treatment after hot bath, acidpre-etching, and pre-chlorination, and then undergoing base oxygen-mechanical associative de-gumming treatment, finally adding a softener for secondary scouring. The hemp fiber surface de-gumming effect treated by the technique is prior to ordinary base oxygen method and mechanical de-gumming, and the former meets the requirement of product of national first grade; the lignin content meets requirement of finishing technique after spinning, which obtains good whiteness and flexibility, and controls breaking strength and tensile stretch of fiber in requirement of spinnability, with improved length and fineness of fiber is improved, greatly improved serviceability, and less pollutant effluents discharged, so that the invention is environment-friendly.

Description

technical field [0001] The invention relates to a hemp fiber degumming process, in particular to a hemp fiber freezing radiation assisted degumming process based on an alkali-oxygen-mechanical combined degumming method supplemented by freezing heating and strong ultraviolet radiation. Background technique [0002] The degumming methods of existing hemp (being hemp) fiber, such as: traditional pool retting method, chemical degumming method, microbial degumming method, enzymatic degumming method, flash explosion method, alkali oxygen method, ultrasonic degumming method and mechanical-chemical degumming method law etc. [0003] Feng Xinxing and Chen Jianyong of Zhejiang Sci-Tech University, etc., in the invention patent with the publication number CN1851062 and the name "a hemp degumming process", used a method combining normal temperature and pressure and high temperature and high pressure to degumming the hemp fiber. The general degumming process saves more than 1.5 hours of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/02
Inventor 魏丽乔许并社罗玉成
Owner TAIYUAN UNIV OF TECH
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