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Dimensionality-stable regenerated cellulose fiber and preparation method thereof

A technology of regenerated cellulose and cellulose, which is applied in the field of textile fibers, can solve the problems of low production rate and high hygroscopic expansion rate, and achieve the effect of improving brittleness, strong hook, stable transverse section and longitudinal dimension

Active Publication Date: 2012-07-18
JIANGSU GOLDSUN TEXTILE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the high wet modulus fiber in the domestic market has no obvious change in hygroscopic expansion rate compared with ordinary viscose fiber. Generally, the cross-sectional direction: about 140-150%; longitudinal direction: 1-2%. The problem of low production rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Regenerated cellulose fiber preparation method one

[0017] The bamboo pulp with a degree of polymerization of 500 and a cellulose content of 95% was used to prepare the spinning viscose solution through the processes of impregnation, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and deaeration. And in the post-dissolving process of cellulose, AC1815 equivalent to 0.01% of methyl cellulose and 0.05% of 1,3-dichloro-2-propanol were successively added to obtain 9% methyl cellulose, 6% NaOH, viscosity (falling ball method) 60S, maturity (10%NH 4 Cl) 18ml, viscose xanthate spinning dope with a degree of esterification of 35; wet spinning process is used for spinning. The size of the spinneret is 21000 holes × 0.05mm, the spinning speed is 55m / min, and the coagulation bath composition is: sulfuric acid 120g / L, sodium sulfate 320g / L, zinc sulfate 10g / L. The main indicators of the fiber prepared through the above steps are as follows...

Embodiment 2

[0018] Embodiment 2: Regenerated cellulose fiber preparation method two

[0019] Using wood pulp with a degree of polymerization of 500 and a cellulose content of 93.5%, the spinning viscose solution was prepared through the processes of impregnation, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and degassing. And in the process of dissolving the cellulose, add V-318 equivalent to 2.0% of methyl cellulose to obtain 9% of methyl cellulose, 6% of NaOH, viscosity (falling ball method) 60S, maturity (10%NH 4 Cl) 18ml, viscose xanthate spinning solution with a degree of esterification of 35; 40 minutes before spinning, add dimethylolethylene urea equivalent to 1.5% of cellulose, and use wet spinning process Spinning is performed. The size of the spinneret is 21000 holes × 0.05mm, the spinning speed is 55m / min, and the coagulation bath composition is: sulfuric acid 120g / L, sodium sulfate 320g / L, zinc sulfate 10g / L. The main indicators of the fiber prep...

Embodiment 3

[0020] Embodiment 3: Preparation method three of regenerated cellulose fibers

[0021] Using wood pulp with a degree of polymerization of 500 and a cellulose content of 93.5%, the spinning viscose solution was prepared through the processes of impregnation, pressing, crushing, aging, yellowing, continuous dissolution, filtration, and degassing. And in the post-dissolving process of cellulose, V-318 equivalent to 2.0% of methyl cellulose and 1.0% of AC1815 were added respectively to obtain 9% methyl cellulose, 6% NaOH, viscosity (falling ball method) 60S, maturity (10%NH 4 Cl) 18ml, viscose xanthate spinning stock solution with a degree of esterification of 35; 20 minutes before spinning, add dimethylol urea equivalent to 1.8% of cellulose, and use wet spinning process for spinning . The size of the spinneret is 21000 holes × 0.05mm, the spinning speed is 55m / min, and the coagulation bath composition is: sulfuric acid 120g / L, sodium sulfate 320g / L, zinc sulfate 10g / L. The mai...

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Abstract

The invention relates to a preparation method of a dimensionality-stable regenerated cellulose fiber. The preparation method comprises the following steps: carrying out dipping, squeezing, crushing, ageing, yellowing, continuous dissolving, filtering, and deaeration operations on a cellulose raw material to prepare a spinning viscose glue; and spinning to prepare the dimensionality-stable regenerated cellulose fiber, wherein a mixture comprising one or more of a denaturant and a crosslinking agent is added in the continuous dissolving step of the spinning viscose glue operation or before the spinning step. The dimensionality, the dry strength, the wet strength and the dry extension of the dimensionality-stable regenerated cellulose fiber are 1.4-1.72dtex, 1.6-3.0CN / dtex, 1.2-2.8CN / dtex and 10-20% respectively. The dimensionality-stable regenerated cellulose fiber prepared by adopting the method of the invention overcomes disadvantages of low fabric preparation rate and bad dimensional stability caused by the overhigh hygroscopic expansion rate and large wet tensile elongation of common viscose fibers, and has the advantages of stable transverse section and vertical dimensionality, and strong weaving strength.

Description

technical field [0001] The invention relates to a textile fiber, in particular to a dimensionally stable regenerated cellulose fiber and a preparation method of the fiber. Background technique [0002] Ordinary viscose fiber (that is, wet-spun regenerated cellulose fiber) has a large number of hydrophilic hydroxyl groups, so it has the characteristics of moisture absorption and moisture balance adjustment. At the same time, the dry initial modulus of the fiber is low, so it can make the skin soft and smooth. Comfortable next-to-skin feel. However, ordinary viscose fiber swells in the cross-sectional direction and the longitudinal dimension when it absorbs moisture, especially in the cross-sectional direction, and the transverse hygroscopic expansion rate is much higher than its longitudinal hygroscopic expansion rate. The finishing rate is low in dyeing and finishing. If pre-shrinkage finishing or anti-shrinkage finishing is not carried out, the internal stress of the finis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08
Inventor 喻翠云陈红霞刘格莎胡青青王彦妹丁可敬
Owner JIANGSU GOLDSUN TEXTILE SCI & TECH
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