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Method for preparing regenerated cellulose fibers from plant fibrous pulp of reeds and stalks

A technology for regenerating cellulose and plant fibers, which is applied to artificial filaments in cellulose solution, spinning solution preparation, wet spinning and other directions to achieve the effects of high strength, good fiber performance and simple process

Inactive Publication Date: 2010-06-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing viscose method for preparing regenerated cellulose fibers, and to provide a method for preparing regenerated cellulose fibers with plant fiber pulp such as reeds and straws, which has simple process, low pollution, and good fiber performance. method to make up for the insufficient supply of existing cellulose pulp raw materials, and also to add new members to the cellulose fiber family

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 20g of reed pulp (the degree of polymerization is 800, and the mass content of α-cellulose is 93.2%) is added to 202g NMMO solvent containing 13% water, 0.02g gall It takes about 5 hours to dissolve in the system composed of propyl acetate. After the obtained solution was filtered and defoamed, a transparent, light yellow, bubble-free regenerated cellulose spinning stock solution with a mass concentration of 9% was obtained. Spinning under the condition that the spinneret is 36 holes × 0.06mm, and the spinning speed is 300m / min, the thin stream of the ejected stock solution first passes through the air gap filled with nitrogen with a length of 8cm, and then enters the solvent as water, 20 ℃, coagulated in a 1.5m long coagulation bath. After washing with water, oiling and drying, the regenerated reed cellulose fibers with a linear density of 3.08dtex, a dry breaking strength of 3.72cN / dtex and a dry breaking elongation of 14.16% were obtained.

Embodiment 2

[0023] 20g of wheat straw pulp (the degree of polymerization is 502, the mass content of α-cellulose is 94.7%) is added to 113g NMMO solvent containing 12% water, 0.04g gall It takes about 5 hours to dissolve in the system composed of propyl acetate. After filtering and defoaming, a transparent, light yellow, bubble-free regenerated cellulose spinning stock solution with a mass concentration of 15% is obtained. The spinneret is 160 holes × 0.15mm, spinning at a spinning speed of 350m / min. The thin stream of the ejected stock solution first passes through the air gap filled with argon gas with a length of 10cm, and then enters the solvent with a mass concentration of 5%. NMMO, 5°C, coagulated in a 3m long coagulation bath. After washing, oiling and drying, the wheat straw cellulose fibers with a linear density of 2.74 dtex, a dry breaking strength of 4.66 cN / dtex and a dry breaking elongation of 10.93% were obtained.

Embodiment 3

[0025] At 70°C to 90°C, under vacuum and stirring, 20g bagasse pulp (the degree of polymerization is 716, the mass content of α-cellulose is 96.1%) is added to 230g NMMO solvent containing 11% water, 0.1g It takes about 2.5 hours to dissolve in a system composed of propyl gallate. After filtering and defoaming, a transparent, light yellow, bubble-free regenerated cellulose spinning stock solution with a mass concentration of 8% is obtained. The spinneret is 400 holes × 0.3mm, spinning at a spinning speed of 300m / min. The thin stream of the ejected stock solution first passes through the air gap filled with argon gas with a length of 6cm, and then enters the solvent with a mass concentration of 15%. NMMO, 30°C, coagulated in a 1m long coagulation bath. After washing, oiling and drying, the bagasse cellulose fibers with a linear density of 3.21 dtex, a dry breaking strength of 3.58 cN / dtex and a dry breaking elongation of 14.92% were obtained.

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Abstract

The invention relates to a method for preparing regenerated cellulose fibers from plant fibrous pulp of reeds and stalks. The method is the solvent method, and comprises the following steps of: preparing 8 to 15 mass percent spinning solution of the regenerated cellulose fibers by adopting the direct method or indirect method; and spinning the obtained spinning solution of the regenerated cellulose fiber. The method has the advantages of simple process, little pollution, and good performance of the fiber prepared by the method. The regenerated cellulose fiber of reeds, stalks and the like, prepared by the method, has the advantages of high strength, softness, smoothness, good moisture absorbing property, convenient dyeing and the like.

Description

technical field [0001] The present invention relates to a method for preparing regenerated cellulose fiber from reed, straw and other plant fiber pulp, more precisely, the regenerated cellulose fiber is prepared by solvent method using reed and / or straw and other plant fiber pulp as raw material. to make. Background technique [0002] Regenerated cellulose fiber is widely used in weaving, thread making, cashmere making, knitting, etc. because of its good hygroscopicity, drapability, easy dyeing and biodegradability; because it is comfortable to wear, it is especially suitable for making underwear and can be Blend or interweave with wool, hemp, silk and other fibers. Before the 1970s, viscose fiber made from cotton pulp and wood pulp was the first type of chemical fiber production. In recent years, new generations of fibers such as Modal and Tencel have added some new varieties to the cellulose fiber family. Due to the reduction of arable land and the depletion of petroleu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/02D01D1/02D01D5/06
Inventor 刘必前汪前东陆建雄李兰吴杰
Owner INST OF CHEM CHINESE ACAD OF SCI
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