Polyphenylene terephthalamide fibre and preparation method thereof

A technology of poly-p-phenylene terephthalamide and para-phenylene terephthalamide is applied in the field of high-performance poly-p-phenylene terephthalamide fiber and its preparation technology, and can solve the difficulty of fiber technology , affecting industrial efficiency and other issues, to achieve the effect of a wide range of applications, low industrial cost and high efficiency

Active Publication Date: 2011-09-14
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 terephthalamide p-phenylene diamide fiber (PPTA), is prepared from poly-p-phenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 4.5dL / g, and its logarithmic viscosity Compared with the logarithmic viscosity of the polymer, the decline rate is less than 0.5dL / g. The specific indicators of the high-performance poly-paraphenylene terephthalamide fiber (PPTA) include: the yarn denier is 300 denier, and the strength is 18 grams per denier. 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 preparation method of poly-p-phenylene terephthalamide fiber (PPTA), comprising polymerization and spinning steps, wherein:

[0043] A. Polymerization

[0044] (a) Polymerization raw materials include:

[0045] p-phenylenediamine (p-phenylene diamine) [PPD],

[0046] Terephthaloyl chloride [TPC],

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

[0048] Polymerization-...

Embodiment 2

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

[0058] A preparation method of poly-p-phenylene terephthalamide fiber (PPTA), comprising polymerization and spinning steps, wherein:

[0059] A. Polymerization

[0060] (a) Polymerization raw materials include:

[0061] p-phenylenediamine (p-phenylene diamine) [PPD],

[0062] Terephthaloyl chloride [TPC],

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

[0064] Polymerization-assisting salt (i.e. co-solvent) is calcium chloride (CaCl 2 );

...

Embodiment 3

[0073] A kind of poly-p-phenylene terephthalamide fiber (PPTA), which is prepared from a poly-p-phenylene terephthalamide (PPTA) polymer with a logarithmic viscosity of 6.0dL / g, and its logarithmic Compared with the polymer logarithmic viscosity, the decrease rate of viscosity is less than 0.5dL / g. The specific indicators of the high-performance poly-p-phenylene terephthalamide fiber (PPTA) include: bundle yarn denier 2000 denier, strength 20 g / denier , Elongation 3.5%, modulus 500 g / denier, water content 6%, logarithmic viscosity 5.0dL / g.

[0074] A preparation method of poly-p-phenylene terephthalamide fiber (PPTA), comprising polymerization and spinning steps, wherein:

[0075] A. Polymerization

[0076] (a) Polymerization raw materials include:

[0077] p-phenylenediamine (p-phenylene diamine) [PPD],

[0078] Terephthaloyl chloride [TPC],

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

[0080] Polymerization-assisting salt (i.e. co-solvent) is calcium chloride ...

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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 with a logarithmic viscosity of 4.5-8.0dL / g obtained by a low-temperature solution polycondensation method as a starting point. High-performance poly-p-phenylene terephthalamide fibers suitable for industrial scale production made by spinning method and its preparation process. Background technique [0002] Poly(p-phenylene terephthalamide)] (PPTA) was synthesized in 1965 by the DuPont Company of the United States using a low-temperature solution polycondensation reaction, and then used PPTA / H 2 The SO4 solution has liquid crystal behavior, and the method of dry-jet wet spinning was invented to obtain high-performance poly-p-phenylene terephthalamide fibers. Patents of related technologies were successively published in the United States from 1970 to 1985, for example: patent technology numbers: 3671542, 3819587, 19730361818, 3767...

Claims

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Application Information

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Patent Type & Authority Patents(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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