Production of a carbon fiber multifilamentary tow which is parti

Details Production of a carbon fiber multifilamentary tow which is parti Production of a carbon fiber multifilamentary tow which is parti

1983-08-30

1985-08-13

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Filaments

264 296, 264 297, 264108, 264136, 4234474, 4234476, 4234478, D01F 912

Patent

active

045349193

ABSTRACT:
An improved process is provided for the thermal conversion of a multifilamentary tow of an acrylic fibrous material wherein the filaments are disposed in a substantially parallel relationship in a multifilamentary tow of carbonaceous fibrous material which contains at least 70 percent (preferably at least 90 percent) carbon by weight. During at least one stage of the process the multifilamentary tow is subjected to the impingement of at least one stream of a liquid whereby the parallel relationship of the filaments is disrupted in the substantial absence of filament damage with the filaments becoming decolumnized to a degree sufficient to enable the resulting carbonaceous fibrous material to be more readily impregnated by and dispersed within a matrix-forming resin. In a preferred embodiment such impingement is carried out following a thermal stabilization step and prior to a carbonization step while the multifilamentary tow is simultaneously completely submerged within a liquid. The particularly preferred liquid for use in the process is water.

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