Production method of dry-spun acrylic fiber 1.11dtex staple

A 1.11dtex, production method technology, applied in the direction of dry spinning, fiber chemical characteristics, stretch spinning, etc., can solve the problems of no batch production, unstable equipment operation, high production cost, etc., and achieve stable product quality, yarn The effect of normal coloring and increasing the number of fiber crimps

Active Publication Date: 2018-03-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic dry-process acrylic fibers are generally based on products with a linear density above 1.67dtex, and there is no production method for mass production of 1.11dtex staple fibers; due to limited equipment conditions, the production of 1.11dtex products using existing conditions is high in production costs and unstable in equipment operation

Method used

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  • Production method of dry-spun acrylic fiber 1.11dtex staple
  • Production method of dry-spun acrylic fiber 1.11dtex staple

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) The mass percentage of acrylonitrile is 93.5%, the mass percentage of methyl acrylate is 6%, and the mass percentage of sodium styrene sulfonate is 0.5% to prepare monomer materials and carry out polymerization reaction;

[0020] 2) Carry out the following steps in sequence: primary filtration - secondary filtration - polymer drying - stock solution preparation - stock solution filtration;

[0021] 3) In the spinning step, the temperature of the spinning tunnel is controlled at: the temperature of the air chamber is 330°C, the temperature of the cone body is 205°C, the upper part of the upper tunnel is 170°C, and the lower part of the upper tunnel is 150°C;

[0022] 4) In the water washing and drawing step, the temperature of the first washing tank is 93°C, the second washing tank is 96°C, the fifth washing tank is 98°C, and the eighth washing tank is 99°C. Steam injection pipeline, the outlet steam pressure of the steam injection pipeline is 0.43MPa; the water washi...

Embodiment 2

[0025] 1) The mass percentage of acrylonitrile is 93.6%, the mass percentage of methyl acrylate is 5.0%, and the mass percentage of sodium styrene sulfonate is 0.4%. The monomer material is prepared for polymerization;

[0026] 2) Carry out the following steps in sequence: primary filtration - secondary filtration - polymer drying - stock solution preparation - stock solution filtration;

[0027] 3) In the spinning step, the temperature of the spinning tunnel is controlled at: the temperature of the air chamber is 329°C, the temperature of the cone body is 204°C, the upper part of the upper tunnel is 169°C, and the lower part of the upper tunnel is 148°C;

[0028] 4) In the water washing and drawing step, the temperature of the first washing tank is 92°C, the second washing tank is 95°C, the fifth washing tank is 99°C, and the eighth washing tank is 99°C. Steam injection pipeline, the outlet steam pressure of the steam injection pipeline is 0.46MPa; the water washing and drawi...

Embodiment 3

[0031] 1) The mass percentage of acrylonitrile is 93%, the mass percentage of methyl acrylate is 6.3%, and the mass percentage of sodium styrene sulfonate is 0.7%. The monomer material is prepared for polymerization;

[0032] 2) Carry out the following steps in sequence: primary filtration - secondary filtration - polymer drying - stock solution preparation - stock solution filtration;

[0033] 3) In the spinning step, the temperature of the spinning tunnel is controlled at: the temperature of the air chamber is 331°C, the temperature of the cone body is 206°C, the upper part of the upper tunnel is 172°C, and the lower part of the upper tunnel is 149°C;

[0034] 4) In the water washing and drawing step, the temperature of the first washing tank is 96°C, the second washing tank is 97°C, the fifth washing tank is 98°C, and the tenth washing tank is 99°C. Steam injection pipeline, the outlet steam pressure of the steam injection pipeline is 0.48MPa; the water washing and drawing ...

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Abstract

The invention relates to a production method of a dry-spun acrylic fiber 1.11dtex staple, which belongs to the technical field of dry-spun acrylic fibers. The production method is characterized in that the process steps include polymerization, filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drafting, fiber drying and packaging, wherein the step of polymerization adopts three materials, i.e. acrylonitrile, methyl acrylate and sodium p-styrenesulfonate, as monomers for polymerization; in the step of spinning, spinning shaft temperature iscontrolled at 325 DEG C to 335 DEG C in air chamber temperature, 200 DEG C to 210 DEG C in cone temperature, 165 DEG C to 175 DEG C in the upper part of an upper shaft and 145 DEG C to 155 DEG C in the lower part of the upper shaft; the crimping speed ratio in the step of washing and drafting is 10.2 to 11.3 times. By designing the new spinning production process conditions and using the specificcrimping speed ratio, the production method realizes the continuous batch production of the dry-spun acrylic fiber 1.11dtex staple at low cost, increases the fiber crimp number, and greatly increasesfiber cohesion.

Description

technical field [0001] The invention discloses a method for producing dry-process acrylic fiber 1.11dtex short fibers, belonging to the technical field of dry-process acrylic fiber. Background technique [0002] Acrylic fiber is the trade name of polyacrylonitrile fiber, and it is one of the main varieties of synthetic fibers. Dry-process acrylic fibers are solidified and molded in high-temperature nitrogen. During the fiber forming process, the evaporation rate of the solvent on the surface of the fibers is greater than that in the interior, forming a unique dog-bone cross-section of dry-process acrylic fibers. The dog-bone cross-section of dry-laid acrylic fiber makes it have better bulkiness, resilience and stronger covering ability than wet-laid acrylic fiber. The same weight of dry acrylic fabric is fuller and thicker than that of wet acrylic fiber. At the same time, the surface of the fiber is smooth, with natural luster and elegant style. These unique product advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/38D01D5/04D01D5/14D01D10/06
CPCD01D5/04D01D5/14D01D10/06D01F6/38
Inventor 李胸有贾克英李志强孙常山吴连强徐越孙华田刘勇赵敏成强
Owner CHINA PETROLEUM & CHEM CORP
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