Method for preparing aramid IIII fiber

A fiber and aramid fiber technology, applied in the field of preparation of aramid fiber III, can solve the problems of low spinning efficiency, investment cost and high spinning cost, and achieve lower spinning cost, investment cost and spinning cost, investment cost reduction effect
CN101851809AInactive Publication Date: 2010-10-06SINOSELEN HI TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOSELEN HI TECH
Publication Date
2010-10-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing an aramid IIII fiber, which comprises the following steps of: (1) synthesizing a spinning stock solution, carrying out low-temperature copolymerization by adopting three monomers of p-phenylenediamine, paraphthaloyl chloride and 5(6)-amido-2-(4-amidophenyl)benzimidazole as raw materials and adopting dimethylacetylamide / lithium chloride as a solvent; (2) spinning by adopting a dry method spinning process, i.e. leading the spinning stock solution obtained in the previous step to pass through a spinneret and directly enter a hot inert gas channel and evaporating and removing the solvent in the spinning stock solution by utilizing a hot inert gas to obtain cured raw yarn; and (3) carrying out water washing and heat treatment on the raw yarn and winding to obtain the aramid IIII fiber. The method has high solid content of the spinning stock solution, high spinning speed, great improvement of spinning efficiency, obvious reduction of fiber manufacturing cost, improved mechanical performance of the manufactured aramid IIII fiber and wide application prospect.
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Description

technical field

[0001] The invention relates to a preparation method of aramid fiber III. Background technique

[0002] Due to the integrated design and manufacture of organic fiber-reinforced resin-based composite materials, the aircraft parts can not only reduce the weight by 20-30% than the aircraft parts manufactured by traditional metal materials and methods, but also reduce the use and maintenance costs by 15-25% compared with metal materials. %, thus resin-based composites have been widely used in the aerospace field. Among them, high-performance fiber is the most important component of resin matrix composites.

[0003] As a high-strength and high-modulus organic fiber, aramid III fiber (called Armos fiber in Russia) has become a reinforcing fiber for the preparation of advanced aerospace composite materials. Russian patent RU2074182 and RU2130980 have introduced the production technology of this resin and fiber, and it is specifically made of p-phenylenediamine, te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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