Process for preparing an impermeable carbon fiber reinforcing ty

Details Process for preparing an impermeable carbon fiber reinforcing ty Process for preparing an impermeable carbon fiber reinforcing ty

1991-11-27

1993-09-14

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

With carbonizing, then adding carbonizable material and...

264 296, 264 297, 264 85, 264101, 264325, 4254052, C04B 3552

Patent

active

052446093

ABSTRACT:
A process for preparing an impermeable carbon fiber reinforcing deposit material including placing a preformed carbon fiber material and an impregnating material of pitch or heat-resistant glass or mixtures thereof into a heat-resistant capsule; placing said capsule into a pressing container; heating the mixture to the melt temperature of the impregnating material under pressure of an inert gas; after maintaining temperature for a given time reducing the temperature and pressure; subsequently, raising the temperature gradually while maintaining the reduced pressure; after heating to a maximum temperature, maintaining said maximum temperature at the reduced pressure for a given time; then injecting an inert gas to raise the pressure to a given value; and, after maintaining the pressure for a given time, reducing both the pressure and the temperature.

REFERENCES:
patent: 4668579 (1987-05-01), Strangman et al.
patent: 4822538 (1989-04-01), Yoshida et al.
patent: 5009823 (1991-04-01), Kromrey
patent: 5022343 (1991-06-01), Fujikawa et al.
patent: 5057254 (1991-10-01), Sohda et al.
patent: 5114635 (1992-05-01), Sohda et al.

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