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Flame-resistant fiber, carbon fiber, and processes for the production of both

A fire-resistant fiber and fire-resistant technology, which is used in the manufacture of fire-retardant and flame-retardant filaments, rayon manufacturing, and chemical characteristics of fibers. Excellent effect of modulus, thermal conductivity and electrical conductivity

Inactive Publication Date: 2012-02-22
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the refractory polymer molecules used as raw materials have a rigid structure, it is extremely difficult to highly orient the molecules, and as a result, it is also difficult to obtain carbon fibers with excellent mechanical properties.

Method used

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  • Flame-resistant fiber, carbon fiber, and processes for the production of both

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0195] Put 100 parts by weight of AN, 0.6 parts by weight of itaconic acid, 371 parts by weight of DMSO, 0.4 parts by weight of azobisisobutyronitrile (hereinafter abbreviated as ABIN), and 1 part by weight of octyl mercaptan into the reaction vessel. Heat polymerization was carried out at 65° C. for 5 hours and 75° C. for 7 hours to prepare a solution containing PAN consisting of 99.5 mol % AN and 0.5 mol % itaconic acid using DMSO as a solvent. Use a pump to exhaust the entire system, depressurize to 30hPa to remove monomers, then heat to 160°C to add DMSO and MEA, and react for 60 minutes in a uniform state. Furthermore, ONT was added and reacted at 160° C. for 120 minutes to obtain a black solution containing a refractory polymer. The feed weight ratio at this time is PAN / DMSO / MEA / ONT=10 / 78 / 6 / 6.

[0196] The viscosity of the solution containing the refractory polymer obtained after cooling was 50 Pa·s at 25°C and 20 Pa·s at 50°C.

[0197] In addition, this fire-resistant...

Embodiment 2

[0215] Put 100 parts by weight of AN, 371 parts by weight of DMSO, 0.4 parts by weight of ABIN, and 1 part by weight of octyl mercaptan into a reaction vessel. After nitrogen replacement, heat polymerization at 65°C for 5 hours and heat polymerization at 75°C for 7 hours to prepare A solution containing PAN consisting of 100 mol% AN using DMSO as a solvent. Use a pump to exhaust the whole system, reduce the pressure to 30hPa to remove the monomer, then add DMSO, MEA and ONT after heating to 160°C, and react at 160°C for 60 minutes to obtain a black solution containing a refractory polymer. The feed weight ratio at this time is PAN / DMSO / MEA / ONT=10 / 74 / 8 / 8.

[0216] The viscosity of the solution containing the refractory polymer obtained after cooling was 50 Pa·s at 25°C and 20 Pa·s at 50°C.

[0217] In addition, this fire-resistant polymer was poured into warm water, and the coagulated polymer was separated by filtration, and the fire-resistant polymer was dried and separated a...

Embodiment 3

[0228] Dry yarns were obtained in the same manner as in Example 2, except that drying conditions were changed, drying was performed with a dry heat apparatus at 150° C. for 10 minutes, and the stretching ratio was 1.05 times. The dry yarn had a specific gravity of 1.21 and an elongation of 1.1%. In addition, the remaining rate of acryloyl group was 36%. The variation rate of the cross-sectional area of ​​the single fiber was 22%. The heat release by DSC was 89 J / g.

[0229] A refractory fiber bundle was obtained in the same manner as in Example 2, except that the stretching ratio of the steam stretching was changed to 2.4 times using the obtained dried yarn.

[0230] The obtained refractory fiber bundle had a single fiber fineness of 2.2 dtex, a strength of 2.7 cN / dtex, and an elongation of 20%, and the evaluation of fire resistance was "good fire resistance". In addition, the fluctuation rate of the cross-sectional area of ​​the single fiber was 24%, and the variation was ...

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Abstract

In a flame resistant fiber assembly obtainable by fiber forming a flame resistant polymer, a flame resistant fiber of a higher performance is obtained by improving fiber forming ability. A carbon fiber of a high performance is obtained by carbonizing the flame resistant fiber. At obtaining a flame resistant fiber by subjecting a solution containing a flame resistant polymer modified by an amine-based compound to a wet spinning or a semi-dry spinning in a coagulation bath in such a way that a degree of swelling of a coagulated yarn at the outlet of the coagulation bath is 100 to 1000 wt% and then, in a bath, subjecting to a drawing and / or water washing and to a drying under tension, the flame resistant fiber is produced by controlling temperature of the drawing bath / water washing bath, drying temperature or tension in such a way that the obtained fiber would not crystallize. And, a carbon fiber is produced by carbonizing said flame resistant fiber.

Description

technical field [0001] The present invention relates to a refractory fiber, a carbon fiber and a method for producing the same. More specifically, the present invention relates to a refractory fiber, a high-performance carbon fiber, and a method for producing the same, which are suitable for obtaining a high-performance carbon fiber with less variation in elongation. Background technique [0002] Due to the excellent heat resistance and flame retardancy of refractory fibers, it is widely used in fireproof and heat insulating materials such as welding shields and aircrafts to protect the human body from high-heat iron powder scattered during welding operations or welding cremation, etc. demand has increased. [0003] In addition, refractory fiber is also important as an intermediate raw material for obtaining carbon fiber. Due to its mechanical and chemical properties and light weight, the carbon fiber is widely used in various applications, such as aerospace materials such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/18C01B31/02C08F8/32D01F9/22
CPCD01F9/22D01F1/10D01D5/06D01F6/18D01F1/07D01F9/14C08F8/32Y10T428/2918
Inventor 川上大辅樋口彻宪山崎胜巳石田富弘山冈孝一
Owner TORAY IND INC
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