Preparation method of black p-aramid fiber

A para-aramid fiber, black technology, applied in the direction of adding pigments, single-component polyamide artificial filaments, etc.

Active Publication Date: 2012-12-26
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Regarding the colored fibers dyed by the post-spinning dyeing process, the color fastness index needs to be investigated, but there is no relevant description of the color fastness in this patent

Method used

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  • Preparation method of black p-aramid fiber
  • Preparation method of black p-aramid fiber
  • Preparation method of black p-aramid fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Get average diameter is 3nm, average length is 15 μ m, average number of walls is 5, unmodified multi-walled carbon nanotube 1.0kg is placed in 500kg 100% mass percentage concentrated sulfuric acid, at first with the stirring speed of 1000rpm stirring 2.0 hours, Then, it was ultrasonicated for 4.0 hours with a power of 60 kHz to form a uniform dispersion of carbon nanotubes;

[0031] Weigh 125 kg of PPTA with an intrinsic viscosity of 7.5 dL / g, and dissolve the PPTA in the carbon nanotube dispersion obtained above through a twin-screw extruder to obtain a spinning stock solution;

[0032] After the spinning dope is filtered and defoamed, the spinneret with a hole diameter of 0.07mm and a hole number of 667 is used for dry spraying and wet spinning, and then alkali washing, water washing, drying and heat treatment to obtain black para-aramid fiber , the heat treatment temperature is 200°C.

[0033] Above-mentioned PPTA is made through the following steps:

[0034] 1. A...

Embodiment 2

[0038]Take 1.0 kg of unmodified multi-walled carbon nanotubes with an average diameter of 3 nm, an average length of 15 μm, and an average number of walls of 4 and place them in 400 kg of 98% by mass concentrated sulfuric acid, and first stir for 1.0 hour at a stirring speed of 1000 rpm , and then ultrasonically sonicate for 3.0 hours with a power of 100kHz to form a uniform carbon nanotube dispersion;

[0039] Weigh 100kg of PPTA with an intrinsic viscosity of 6.5dL / g, and dissolve the PPTA in the carbon nanotube dispersion obtained above through a twin-screw extruder to obtain a spinning stock solution;

[0040] After the spinning dope is filtered and defoamed, the spinneret with a hole diameter of 0.07mm and a hole number of 667 is used for dry spraying and wet spinning, and then alkali washing, water washing, drying and heat treatment to obtain black para-aramid fiber , the heat treatment temperature is 200°C.

[0041] Above-mentioned PPTA is made through the following st...

Embodiment 3

[0046] Take 1.0 kg of unmodified multi-walled carbon nanotubes with an average diameter of 1 nm, an average length of 20 μm, and an average number of walls of 2 and place them in 300 kg of 98% by mass concentrated sulfuric acid, and first stir for 1.0 hour at a stirring speed of 1000 rpm , and then ultrasonically sonicate for 12 hours with a power of 50 kHz to form a uniform dispersion of carbon nanotubes;

[0047] Weigh 75kg of PPTA with an intrinsic viscosity of 6.5dL / g, and dissolve the PPTA in the above-mentioned obtained carbon nanotube dispersion through a twin-screw extruder to obtain a spinning stock solution;

[0048] After the spinning dope is filtered and defoamed, the spinneret with a hole diameter of 0.07mm and a hole number of 667 is used for dry spraying and wet spinning, and then alkali washing, water washing, drying and heat treatment to obtain black para-aramid fiber , the heat treatment temperature is 200°C.

[0049] The preparation method of above-mentione...

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Abstract

The invention relates to a preparation method of black p-aramid fiber. The black p-aramid fiber obtained by the preparation method has high fiber strength and is fadeless. The preparation method comprises the following steps of: (1) dispersing multi-walled carbon nanotubes in concentrated sulfuric acid to obtain carbon nanotube dispersion, wherein the weight ratio of the multi-walled carbon nanotubes to concentrated sulfuric acid is 1:(100-500), the average wall number of the multi-walled carbon nanotubes is 2-6, the average diameter of the multi-walled carbon nanotubes is 1-20nm, and the average length of the multi-walled carbon nanotubes is 0.5-20mu m; and (2) dissolving poly-p-phenylene terephthamide to the carbon nanotube dispersion to obtain a spinning stock solution, filtering and debubbling the spinning stock solution, spinning by a dry-jet wet spinning method, washing with base, washing with water, drying and carrying out heat treatment to obtain the black p-aramid fiber, wherein the weight ratio of poly-p-phenylene terephthamide to the carbon nanotube dispersion is 1:(3.9-4.1), and the intrinsic viscosity of poly-p-phenylene terephthamide is 6-8dL/g<3>.

Description

technical field [0001] The invention relates to a method for preparing chemical fibers, in particular to a method for preparing black para-aramid fibers. Background technique [0002] Para-aramid is polyparaphenylene terephthalamide (abbreviated as PPTA), which has the characteristics of light weight, high strength and high modulus, high temperature resistance and flame retardancy. It is mainly used in body armor, helmets, aerospace materials, Tire frame materials, reinforcement materials, etc. However, due to the regular structure and high glass transition temperature of para-aramid fiber, it is difficult to dye, which limits its application in the textile field. [0003] At present, para-aramid fiber dyeing is mainly carried out through post-spinning dyeing methods, such as high temperature and high pressure method, and carrier dyeing method. The para-aramid fiber prepared by the above method has the disadvantages of reduced mechanical properties and low color fastness. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F1/04
Inventor 马千里官国振邱召明彭慧胜
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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