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Hemp-material viscose fiber and preparing method thereof

A viscose fiber and linen technology, applied in the field of linen viscose fiber, can solve the problems of high material consumption, complicated process, unsatisfactory properties such as whiteness, strength and fiber elongation of viscose fiber, etc. The effect of low material consumption, simple process and excellent whiteness

Inactive Publication Date: 2008-02-27
CHTC HELON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore using hemp plants as raw materials to produce viscose fiber is an effective way for people to solve the shortage of viscose raw materials, but there are not many methods for people to produce viscose fibers with hemp plants as raw materials at present, and some existing The whiteness, strength and fiber elongation of the viscose fiber produced by the process of producing viscose fiber using hemp plants as raw materials are not very satisfactory; and its technology is also relatively complicated, and the material consumption in production is relatively high. This affects people's utilization of hemp plants, and also affects the production and quality of viscose fibers to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] At first carry out material preparation, adopt conventional technology well known in the art to carry out material preparation, adopt cutting equipment to process after the hemp material plant is cut off, and give preparatory work through screening, cleaning, impurity removal etc., to select the hemp material raw material that meets production needs, Afterwards, it is boiled in a digester, and the steaming condition is 25% relative to the absolute dry hemp raw material in terms of NaOH, and the liquid ratio is 1: 6 for liquid dosing, and the temperature is raised to 165° C. in 40 minutes, and the heat preservation is as follows: After 180 minutes, let off the residual liquid after cooking, wash and wash the cooked hemp pulp to meet the production requirements, and then beat it in a beater. The beating concentration is controlled between 5%, and the beating is 60 minutes , it is required that there are no small pulp clusters in the obtained pulp, and sand removal is carri...

Embodiment 2

[0023] The process steps adopted in this example are the same as those in Example 1, except that when cooking in the process, the amount of NaOH relative to the dry hemp material is 20%, the liquid ratio is 1:4, and the temperature is raised to 175 ° C within 60 minutes. , and keep warm for 150 minutes;

[0024] The beating concentration is between 8%, beating for 45 minutes;

[0025] Bleaching uses two-stage chlorination bleaching:

[0026] The first stage of bleaching: the pH value is 11, the amount of chlorine used is 3% of the amount of available chlorine relative to the dry pulp, and the temperature is 35°C, and the bleaching is carried out for 60 minutes;

[0027] The second stage of bleaching: PH value 2, the amount of chlorine used is 0.2% of the amount of available chlorine relative to the amount of dry pulp, and the time is 30 minutes;

[0028] The properties of hemp viscose fiber pulp obtained by the above process are dynamic viscosity of 10.6mpa.s, 95.2% of cellu...

Embodiment 3

[0034] The process steps adopted in this example are the same as those in Example 1, except that when cooking in the process, the amount of NaOH relative to the dry hemp material is 15%, the liquid ratio is 1:3, and the temperature is raised to 178° C. within 80 minutes. , and keep warm for 210 minutes;

[0035] The beating concentration is between 10%, beating for 30 minutes;

[0036] Bleaching uses two-stage chlorination bleaching:

[0037] In the first stage of bleaching, at a temperature of 60°C, the amount of chlorine used is 1% of the amount of available chlorine relative to the absolute dry pulp, and the bleaching is carried out for 120 minutes under the conditions of a pH value of 9;

[0038] The second stage of bleaching: PH value 3, the amount of chlorine used is 0.4% of the amount of available chlorine relative to the amount of dry pulp, and the time is 20 minutes;

[0039] The properties of hemp viscose fiber pulp obtained by the above process are dynamic viscosi...

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Abstract

The present invention discloses a method for preparing hemp viscose fiber by using hemp plant and hemp visose fiber prepared by adopting said method. Said method includes the following steps: preparing raw material, digesting, washing material, pulping, removing sand, bleaching, water-washing, fiber-making, impregnating, pressing, pulverizing, aging, xanthating, dissolving, mixing, filtering, defoaming, spinning, drawing, cutting and making after-treatment.

Description

technical field [0001] The invention relates to a chemical fiber technology in the field of textiles, in particular to a method for preparing hemp viscose fiber using hemp plants as raw materials and the hemp viscose fiber prepared by the method. Background technique [0002] As a kind of textile raw material, viscose fiber is deeply loved by consumers due to its light texture, smoothness, softness and comfort. The traditional production method is to use cotton linters and wood as raw materials for production, but currently With the reduction of cotton planting area and the increasingly stringent implementation of the national forest protection policy, the problems of viscose raw material cotton linters and wood shortage are becoming prominent year by year. [0003] Hemp, commonly known as "hemp", is an annual herb of Moraceae, divided into male and female plants. Native to Central Asia. Hemp material is easy to plant, grows rapidly, and has strong adaptability. The stem h...

Claims

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Application Information

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IPC IPC(8): D01C1/00D01D5/06
Inventor 王乐军李琳
Owner CHTC HELON
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