Preparation method of cellulose acetate fiber

A technology of cellulose acetate and cellulose acetate is applied in the directions of fiber processing, rayon made of cellulose derivatives, chemical characteristics of fibers, etc., and can solve the problems of poor fiber mechanical properties, large fiber fineness, and low breaking strength, etc. To achieve the effect of convenient fiber modification, simple processing technology and avoiding pollution

Active Publication Date: 2013-04-03
DONGHUA UNIV
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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 solve the problems of poor fiber mechanical properties, low breaking strength and exudation or volatilization of plasticizers in the plasticized melt spinning process of cellulose acetate in the prior art. The cellulose acetate graft copolymer has problems such as high brittleness and difficult processing caused by large fiber fineness and low strength, and high-strength acetate fiber can be obtained

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Crush cellulose acetate with a degree of substitution of 2.2, a degree of polymerization of 260, and a weight-average molecular weight of 181,800 to 280 mesh, and after drying, mix with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) according to The mass fraction ratio is 2:1 and mixed evenly. The mixture is fed into a twin-screw blender for blending, extrusion, and slicing. The twin-screw blender uses co-rotating screws for blending and extrusion. The temperatures of the feeding section, the melting section, the metering section and the head are respectively 160 ° C to 170 ° C. ℃, 170 ℃, 160~170 ℃, 160 ℃, the speed of the extruder is 10~50 rpm. A colorless and transparent spinning raw material was obtained.

[0037] (2) Put the spinning material into a vacuum oven, and dry it continuously under vacuum for 70 hours at 60°C;

[0038] (3) The spinning material is melt-spun after metering, and the spinning temperature is 170°C. The spinneret hole of the spi...

Embodiment 2

[0041] (1) Crush cellulose acetate with a degree of substitution of 2.3, a degree of polymerization of 360, and a weight-average molecular weight of 235,000 to 250 mesh, and after drying, mix with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) according to The mass fraction ratio is 2:1 and mixed evenly. The mixture is fed into the twin-screw blender for blending, extrusion, and slicing. The twin-screw blender uses co-rotating screws for blending and extrusion. The temperatures of the feeding section, the melting section, the metering section and the head are respectively 170 ° C to 180 ° C. °C, 190 °C, 160~170 °C, 160 °C, the speed of the extruder is 50~120 rpm. A colorless and transparent spinning raw material was obtained.

[0042] (2) Put the spinning material into a vacuum oven, and dry it continuously under vacuum for 70 hours at 60°C;

[0043] (3) The spinning material is melt-spun after metering, and the spinning temperature is 190°C. The spinning speed was...

Embodiment 3

[0046] (1) Crush cellulose acetate with a degree of substitution of 2.6, a degree of polymerization of 1000, and a weight-average molecular weight of 400,000 to 300 mesh, and after drying, mix with 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) according to The mass fraction ratio is 7:1 and mixed evenly. The mixture is fed into the twin-screw blender for blending, extrusion, and slicing. The twin-screw blender uses co-rotating screws for blending and extrusion. The temperatures of the feeding section, the melting section, the metering section and the head are respectively 230 ° C ~ 240 ° C ℃, 240℃, 230~240℃, 230℃. The speed of the extruder is 10 to 30 rpm. A light yellow transparent spinning raw material was obtained.

[0047] (2) Put the spinning material into a vacuum oven, and dry it continuously under vacuum for 30 hours at 120°C;

[0048] (3) The spinning material is melt-spun after metering, and the spinning temperature is 260°C. The spinning speed was 500 ...

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Abstract

The invention relates to a preparation method of cellulose acetate fiber, in particular relates to a method for preparing cellulose acetate fiber after the cellulose acetate fiber is plasticized and modified by taking ionic liquid as a plasticizer. The method comprises the following steps of (1) evenly mixing and extruding the cellulose acetate fiber and the ionic liquid; (2) conducting vacuum drying on spinning materials; (3) conducting melt spinning: spinning the spinning materials through a metering pump and a spin sprayed plate, stretching through a hot roll, extracting liquor and washing; and (4) conducting oiling, drying and winding procedures to obtain cellulose acetate fiber with fiber breakage strength of 2.2-6cN/dtex. By adopting the preparation method of cellulose acetate fiber, the problems that the fiber mechanical property is poor, the breakage strength is low, and due to seeping or volatilization of the plasticizer, high fragility of cellulose acetate fiber grafted copolymer and difficulty of processing in the process of plasticizing and melt spinning cellulose acetate fiber, the fiber fineness is larger and the strength is low, and the like in the dry spinning process of cellulose acetate fiber in the prior art can be solved.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a method for preparing cellulose acetate, in particular to a method for plasticizing and modifying cellulose acetate by using ionic liquid as a plasticizer, and then preparing acetic acid with higher strength by melt spinning Methods of making fibers. Background technique [0002] With the continuous progress of society and the continuous development of science and technology, polymer materials have penetrated into various sectors of the national economy and all aspects of daily life. However, the data shows that the fossil energy and resource reserves of synthetic polymer materials are limited and gradually exhausted. At the same time, the demand for polymer materials in various industries is gradually increasing. In this context, cellulose, as a natural renewable polymer resource that exists widely in nature, has attracted the attention of many researchers. The effective use of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/28D01F1/10D01D5/08D01D5/16D01D5/253D01D1/00
Inventor 刘娜王华平张玉梅姚勇波杨春雷于金超
Owner DONGHUA UNIV
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