High bulk density carbon fiber felt and thermal insulator

Details High bulk density carbon fiber felt and thermal insulator High bulk density carbon fiber felt and thermal insulator

1990-02-26

1992-09-08

Bell, James J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 345, 428218, 428280, 428282, 428281, 428284, 428288, 428289, 428283, 428402, 428408, 428920, 428300, B32B 702

Patent

active

051457326

ABSTRACT:
Polymer-type fibers longitudinally shrinkable by calcination and other carbon fibers are mixed and mechanically compressed and integrated by a needle punch, and the polymer-type fibers are then shrunk when calcined. Thus, there is obtained high bulk density carbon fiber felt having average bulk density of 0.1 g/cm.sup.3 or more without the carbon fiber felt impregnated with resin and compressingly molded. The present invention also provides high bulk density carbon fiber felt of which bulk density is changed in the thickness direction thereof. The high bulk density carbon fiber felt may be used as a thermal insulator for a high-temperature furnace, a heat-resisting cushioning material, and a material for the electrode of a secondary battery.

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