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Polyphenylene terephthalamide fibre and preparation method thereof

A technology of poly-p-phenylene terephthalamide and p-phenylene phthalamide, which is applied in the field of high-performance poly-p-phenylene terephthalamide fiber and its preparation technology, and can solve the difficulties in fiber technology , affecting industrial efficiency and other issues, to achieve the effect of wide application range, low industrial cost and good performance

Active Publication Date: 2010-06-09
中蓝晨光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Polyphenylene terephthalamide fibre and preparation method thereof
  • Polyphenylene terephthalamide fibre and preparation method thereof
  • Polyphenylene terephthalamide fibre and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of p-phenylene terephthalamide fiber (PPTA), prepared from poly-p-phenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 4.5dL / g, and its logarithmic viscosity Compared with the polymer's logarithmic viscosity, the decrease rate is less than 0.5dL / g. The specific indicators of the high-performance poly-p-phenylene terephthalamide fiber (PPTA) include: yarn density 300 denier, strength 18 g / den, The elongation is 3.2%, the modulus is 350 g / denier, the moisture content is 3%, and the logarithmic viscosity is 4.0 dL / g.

[0042] A method for preparing polyparaphenylene terephthalamide fiber (PPTA), including polymerization and spinning steps, wherein:

[0043] A, aggregation

[0044] (a) Polymerization raw materials include:

[0045] P-phenylene diamine [PPD],

[0046] Terephthaloyl chloride [TPC],

[0047] The solvent is (N-methyl pyrrolidone)[NMP],

[0048] The co-polysalt (ie co-solvent) is calcium chloride (CaCl 2 );

[0049] Among them: the molar ratio of...

Embodiment 2

[0057] A kind of poly(p-phenylene terephthalamide) fiber (PPTA), prepared from poly(p-phenylene terephthalamide) (PPTA) polymer with logarithmic viscosity 8.0dL / g as a starting point, its logarithm The viscosity is lower than the polymer logarithmic viscosity by less than 0.5dL / g. The specific indicators of the high-performance poly(p-phenylene terephthalamide) fiber (PPTA) include: bundle fineness 3000 denier, strength 26 g / denier , The elongation is 3.8%, the modulus is 650 g / den, the moisture content is 10%, and the logarithmic viscosity is 7.0dL / g.

[0058] A method for preparing polyparaphenylene terephthalamide fiber (PPTA), including polymerization and spinning steps, wherein:

[0059] A, aggregation

[0060] (a) Polymerization raw materials include:

[0061] P-phenylene diamine [PPD],

[0062] Terephthaloyl chloride [TPC],

[0063] The solvent is (N-methyl pyrrolidone)[NMP],

[0064] The co-polysalt (ie co-solvent) is calcium chloride (CaCl 2 );

[0065] Among them: the molar rat...

Embodiment 3

[0073] A poly(p-phenylene terephthalamide) fiber (PPTA), prepared from a poly(p-phenylene terephthalamide) (PPTA) polymer with a logarithmic viscosity of 6.0dL / g as a starting point. The viscosity is lower than the polymer logarithmic viscosity by less than 0.5dL / g. The specific indicators of the high-performance poly(p-phenylene terephthalamide) fiber (PPTA) include: yarn fineness 2000 denier, strength 20 g / den , Elongation rate 3.5%, modulus 500 g / denier, moisture content 6%, logarithmic viscosity 5.0dL / g.

[0074] A method for preparing polyparaphenylene terephthalamide fiber (PPTA), including polymerization and spinning steps, wherein:

[0075] A, aggregation

[0076] (a) Polymerization raw materials include:

[0077] P-phenylene diamine [PPD],

[0078] Terephthaloyl chloride [TPC],

[0079] The solvent is (N-methyl pyrrolidone)[NMP],

[0080] The co-polysalt (ie co-solvent) is calcium chloride (CaCl 2 );

[0081] Among them: the molar ratio of PPD / TPC is equal to 1.0-1.015, CaCl 2 / ...

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Abstract

The invention discloses a polyphenylene terephthalamide fibre and a preparation method thereof. For the polyphenylene terephthalamide fibre (PPTA) which has with high performance and is prepared by the dry-jet wet spinning method, a polyphenylene terephthalamide fibre (PPTA) polymer which has the inherent viscosity of 4.5-8.0dL / g and is obtained by adopting the low-temperature solution polycondensation method is used as the start point, and the polyphenylene terephthalamide fibre is adaptive to the industrial large-scale production. The inherent viscosity of the fibre is reduced by 0.5dL / g than the inherent viscosity of the polymer. The polyphenylene terephthalamide fibre (PPTA) with high performance comprises the specific indexes as follows: a synnema titer is 300-3000 denier, an intensity is 18-26g / denier, an elongation rate is 3.2-3.8percent, a modulus is 350-650 g / denier, a water ratio is 3-10 percent and an inherent viscosity is 4-7.5dL / g. The physical property of the fibre is superior to the traditional aramid fibre II fibre. The invention discloses the inherent viscosity with the purpose of specifically showing the material of polyphenylene terephthalamide with higher molecular weight.

Description

Technical field [0001] The invention relates to the field of man-made fibers, in particular to a polyparaphenylene terephthalamide (PPTA) polymer obtained by a low-temperature solution polycondensation method with a logarithmic viscosity of 4.5-8.0dL / g as a starting point, using dry spray wet The high-performance poly-p-phenylene terephthalamide fiber prepared by the spinning method and suitable for industrial-scale production and its preparation process. Background technique [0002] Poly(p-phenylene terephthalamide)] (PPTA) was synthesized by DuPont in the United States in 1965 using low-temperature solution polycondensation, and then PPTA / H 2 SO4 solution has liquid crystal behavior, and the method of dry jet wet spinning was invented to obtain high-performance poly-p-phenylene terephthalamide fiber. Related technology patents were successively published in the United States from 1970 to 1985, for example: patent technology numbers: 3671542, 3819587, 197.361818, 3767756, 38694...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01D5/06C08G69/32
Inventor 王凤德彭涛崔晓静李兰英李旭清
Owner 中蓝晨光化工有限公司
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