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Method for producing dry spinning acrylic 1.33dtex short fiber

A production method and technology of dry acrylic fibers, which are applied in the fields of chemical characteristics of fibers, complete sets of equipment for producing artificial threads, textiles and papermaking, etc., can solve the problems of not mass-producing 1.33dtex staple fibers and inability to produce them, and achieve sustainable development. , The effect of smooth production and stable product quality

Active Publication Date: 2019-04-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Domestic dry-process acrylic fibers are generally dominated by products with a linear density above 1.67dtex, and conventional production processes cannot produce dry-process acrylic fine-denier fibers with a linear density of 1.33dtex or below.
There is no production method for mass production of 1.33dtex staple fiber

Method used

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  • Method for producing dry spinning acrylic 1.33dtex short fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Refer to attached figure 1 The specific preparation steps are polymerization, primary filtration, secondary filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drawing, fiber drying, and packaging;

[0027] In the polymerization step of this embodiment, the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 93.5:6:0.8; solution polymerization is adopted, and the solvent used is a composite solvent prepared from dimethylformamide and sodium thiocyanate at a mass ratio of 88:12; the polymerization temperature is 68°C;

[0028] In this embodiment, the temperature of the spinning tunnel is controlled during spinning, washing and drawing: the air chamber temperature is 330°C, the temperature of the vertebral body is 205°C, the temperatur...

Embodiment 2

[0030] Refer to attached figure 1 The specific preparation steps are polymerization, primary filtration, secondary filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drawing, fiber drying, and packaging;

[0031] In the polymerization step of this embodiment, the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 93:7:0.7; solution polymerization is adopted, and the solvent used is a composite solvent prepared by dimethylformamide and sodium thiocyanate at a mass ratio of 86:14; the polymerization temperature is 65°C;

[0032] In this embodiment, the temperature of the spinning tunnel is controlled during spinning, washing and drawing: the air chamber temperature is 328°C, the temperature of the vertebral body is 204°C, the temperature at...

Embodiment 3

[0034] Refer to attached figure 1 The specific preparation steps are polymerization, primary filtration, secondary filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drawing, fiber drying, and packaging;

[0035] In the polymerization step of this embodiment, the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 94:5:1; solution polymerization is adopted, and the solvent used is a composite solvent prepared with dimethylformamide and sodium thiocyanate at a mass ratio of 92:8; the polymerization temperature is 70°C;

[0036]In this embodiment, the temperature of the spinning tunnel is controlled during spinning, washing and drafting: the temperature of the air chamber is 332°C, the temperature of the vertebral body is 206°C, the temperat...

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Abstract

The invention discloses a method for producing a dry spinning acrylic 1.33dtex short fiber, and belongs to the technical field of dry spinning acrylic production. The method is characterized in that apolymer obtained by polymerizing the three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as a spinning dope, and the mass ratio of the acrylonitrile to the methyl acrylate to the sodium styrene sulfonate is 92-96:4-8:0.5-1; a spinning channel temperature is controlled in the spinning and water washing draft, an air chamber temperature is 325 DEG C-335 DEG C, a vertebral body temperature is 200 DEG C-210 DEG C, the temperature of the upper portion of an upper channel is 165 DEG C-175 DEG C, and the temperature of the lower portion of the upper channel is 145 DEG C-55 DEG C; a water washing draft multiple is 6.0-6.8 times, and a water washing tank temperature is 85 DEG C-98 DEG C; a crimp speed ratio is 10.6-11.0 times. A preferred solvent provided by the method is more advantageous for the dispersion of a formulation raw material of the fiber, and the spinning dope after polymerization can better adapt to the production process with a high draft ratio.

Description

technical field [0001] The invention discloses a method for producing 1.33dtex short fibers of dry-process acrylic fiber, which belongs to the technical field of dry-process acrylic fiber production. 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 uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/40C08F220/44C08F220/14C08F212/14C08F2/06D01D13/00D02G1/00D02G1/16D02G1/20
CPCC08F2/06C08F220/44D01D13/00D01F6/40D02G1/004D02G1/164D02G1/20C08F220/14C08F212/14
Inventor 贾克英李志强成强孙华田李胸有
Owner CHINA PETROLEUM & CHEM CORP
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