High-intensity poly(terephthaloyl-p-phenylene diamine) (PPTA) fiber and preparation method thereof

A technology of poly-p-phenylene terephthalamide and phthaloyl-p-phenylene diamine is applied in the field of high-strength poly-p-phenylene terephthalamide fiber and its preparation, and can solve problems affecting industrial efficiency, Problems such as difficulty in fiber processing, to achieve the effects of low industrial cost, high efficiency, excellent impact resistance and ballistic resistance

Inactive Publication Date: 2011-08-17
BLUESTAR CHENGDU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the molecular weight is too high, the process of making fibers is very difficult, which affects industrial efficiency

Method used

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  • High-intensity poly(terephthaloyl-p-phenylene diamine) (PPTA) fiber and preparation method thereof
  • High-intensity poly(terephthaloyl-p-phenylene diamine) (PPTA) fiber and preparation method thereof
  • High-intensity poly(terephthaloyl-p-phenylene diamine) (PPTA) fiber and preparation method thereof

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Embodiment 1

[0038] A method for manufacturing high-strength poly-p-phenylene terephthalamide (PPTA) fibers, characterized in that: poly-p-phenylene terephthalamide (PPTA) polymers with a logarithmic viscosity of 6.5 dL / g As raw material, it is prepared through special treatment in the spinning process of dry-jet wet spinning. The specific indicators of the poly-p-phenylene terephthalamide fiber include: bundle yarn fineness 1500 denier, strength 25 g / denier , elongation 4.0%, modulus 475 g / denier, water content 5%, logarithmic viscosity 6.2dL / g.

[0039] The preparation method of the high-strength poly-p-phenylene terephthalamide fiber includes the steps of synthesizing poly-p-phenylene terephthalamide (PPTA) polymer raw materials and dry-jet wet spinning, and is characterized in that: During the spinning process of dry-jet wet spinning, the spinning speed is controlled at 300m / min, and the diameter of the spinning hole is 0.05mm.

[0040] The specific steps for preparing polyparaphenyle...

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Abstract

The invention discloses a high-intensity poly(terephthaloyl-p-phenylene diamine) (PPTA) fiber. The fiber is prepared by performing special treatment on a PPTA polymer, which has the logarithmic viscosity of 5.5-8.0 dL / g and serves as a raw material, in the dry-jet wet spinning process. The specific indexes of the PPTA fiber are that: the bundle fineness is 300-3,000 D, the intensity is 24-30 g / D, the elongation percentage is 3.6-4.2 percent, the modulus is 350-650 g / D, the water content is 4-10 percent, and the logarithmic viscosity is 5.0-7.5 dL / g. In the dry-jet wet spinning process, the spinning speed is controlled at 100-500 m / min, and the diameter of a spinning hole is less than or equal to 0.05 millimeter, so that a PPTA fiber product with ultrahigh intensity and elongation percentage is obtained. The product has high impact resistance and bullet resistance, and is relatively suitable for military bullet resistance; and the blank in corresponding aspect in China is filled up.

Description

technical field [0001] The invention relates to the field of man-made fibers, especially a kind of polyparaphenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 5.5-8.0dL / g as a raw material, through the spinning process of dry-jet wet spinning A high-strength poly-p-phenylene terephthalamide fiber suitable for industrial scale production obtained by special treatment in the present invention and a preparation method thereof. Background technique [0002] Poly(p-phenylene terephthalamide) (PPTA) fiber was synthesized by DuPont of the United States in 1965 by low-temperature solution polycondensation reaction, and then PPTA / H 2 SO 4 The solution has liquid crystal behavior, and the method of dry-jet wet spinning was invented to obtain high-performance poly-p-phenylene terephthalamide fiber (referred to as "aramid fiber II"). The patents of related technologies were published in the United States in the United States from 1970-1985, such as patent number: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01D5/00C08G69/32
Inventor 王凤德王锡璐彭涛杨其武马俊雍
Owner BLUESTAR CHENGDU NEW MATERIALS
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