D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/9
D01F 9/22 (2006.01)
Patent
CA 1218205
70113-33 IMPROVEMENTS IN THE PRODUCTION OF A CARBON FIBER MULTIFILAMENTARY TOW WHICH IS PARTICULARLY SUITED FOR RESIN IMPREGNATION Abstract of the Disclosure An improved process is provided for the thermal conver- sion 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 relation- ship 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 impinge- ment 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 part- icularly preferred liquid for use in the process is water. -1-
461845
Daumit Gene P.
Ethridge Fredrick A.
Mcaliley J. Eugene
Bp Corporation North America Inc.
Smart & Biggar
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