Biologically-aided totally-chlorine-free bleaching technology of flax cloth or fiber

A linen fabric, completely chlorine-free technology, applied in the textile industry, can solve problems such as cellulose degradation

Inactive Publication Date: 2009-11-18
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The invention solves the problem of cellulose degradation in the lignin removal process by using ...

Method used

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  • Biologically-aided totally-chlorine-free bleaching technology of flax cloth or fiber
  • Biologically-aided totally-chlorine-free bleaching technology of flax cloth or fiber

Examples

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Embodiment 1

[0026] The biologically assisted linen fabric or fiber is fully chlorine-free bleaching process. The original linen fabric is scouring and pickling with alkali, and then bleached with hydrogen peroxide after biological pretreatment. The hydrogen peroxide rebleaching process is carried out according to the following conditions: hydrogen peroxide 4-15g / L, PH value 7-11, bleaching temperature 40-80℃, bath ratio 1:5-20, bleaching time 0.5-2 hours, the whiteness of the bleached product can reach more than 80%, and the tensile strength can reach 500-900× 800-1200N, the wool effect is greater than 8cm, which meets the current technical requirements for linen fabric bleaching.

Embodiment 2

[0028]In the biologically assisted flax fabric or fiber full chlorine-free bleaching process, the bacterial strains used in the biological pretreatment process are: Panus conchatus through ultraviolet irradiation and NTG cellulose-deficient mutant strain AB-210 , the biological pretreatment process uses the secondary culture solution of bacterial species, and the biological pretreatment process time is 2-8 hours by immersing the flax fabric in the culture solution of 10-50 times the weight of the biological pretreatment process. During the process, a cellulase inhibitor was added, and the dosage was 2-20g / L.

Embodiment 3

[0030] In the biologically assisted flax fabric or fiber full chlorine-free bleaching process, the bacterial strains used in the biological pretreatment process are: Panus conchatus through ultraviolet irradiation and NTG cellulose-deficient mutant strain AB-210 , the biological pretreatment process uses the secondary culture solution of bacterial species, and the flax fabric is immersed in the culture solution of 10-50 times the weight, preferably 1:20-30, and the biological pretreatment process time is 3 -5 hours, cellulase inhibitor was added in the biological pretreatment process, and the dosage was 8-12g / L.

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Abstract

The invention relates to a biologically-aided totally-chlorine-free bleaching technology of flax cloth or fiber. An oxygen-contained bleaching agent generally functions on lignin far less than a chloride-contained bleaching agent, so developing a novel pollution-free method for removing lignin in cloth fibers is necessary to realize chlorine-free bleaching; the removal of the lignin is the key of effective bleaching especially for fibers such as the flax fibers containing more lignin. The biologically-aided totally-chlorine-free bleaching technology of flax cloth or fiber comprises the following steps: flax raw cloth is subjected to the alkali boiling off and acid pickling, then is subjected to the biological pretreatment and bleached by hydrogen peroxide; and the hydrogen peroxide re-bleaching process is carried out at the following conditions: 4-15g/L hydrogen peroxide, the pH value of 7-11, the bleaching temperature of 40-80 DEG C, the bath ratio of 1:5-20, and the bleaching time of 0.5-2 hours; and the whiteness of products after bleaching can reach up to more than 80 percent, the tensile strength can reach up to 500-900*800-1200N, the capillary effect is more than 8 cm, and the prior requirements of the bleaching technical indications of flax cloth are met. The invention is used for the treatment of flax cloth or fibers under the chlorine-free condition.

Description

Technical field: [0001] The invention belongs to the field of textile industry. It is characterized by a fully chlorine-free bleaching process that utilizes microorganisms to degrade lignin in flax fabrics (fibers), and then completes bleaching with hydrogen peroxide. Background technique: [0002] Flax is a kind of natural fiber with excellent varieties, which is comfortable to wear, cool and pleasant, and has good air permeability. Therefore, it has always been popular as a raw material for high-end clothing and decorations at home and abroad. [0003] Bleaching is an important process in the production of linen fabrics and plays an important role in the appearance and processability of linen fabrics. Flax bast fiber, raw flax contains only 70-80% cellulose and about 25% lignin. Retted flax fiber also contains 2-5% lignin, much higher than cotton fiber. Because the lignin molecule is composed of aromatic rings and alkyl side chains that are difficult to oxidize, the ble...

Claims

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Application Information

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IPC IPC(8): D06L3/02D06M16/00C12S11/00D06M101/06D06L4/13
Inventor 张辉刘波黄文清王柏臣
Owner HARBIN UNIV OF SCI & TECH
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