Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By treating occluded solids
Patent
1980-10-31
1983-04-12
Anderson, Philip E.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By treating occluded solids
204290R, 204292, 204294, 264122, 264DIG47, B29D 2700, C25B 1404, C25B 1112
Patent
active
043797725
ABSTRACT:
The present disclosure is directed to an electrode active layer or sheet containing from about 60 to about 85 wt. % active carbon in intimate admixture with 15 to 40 wt. % fibrillated PTFE. This electrode has improved strength and is capable of operation at high current density with resistance to mechanical failure due to blistering of the electrode, and to a process for producing same. The process is characterized by combining a dilute dispersion of smaller polytetrafluoroethylene particles with a suspension of catalyzed or uncatalyzed larger active carbon particles to discontinuously coat active carbon with PTFE; fibrillating same; comminuting said fibrillated PTFE/active carbon mix; and then rolling same into a self-sustaining, coherent sheet form. Alternatively, the sheet form can be provided by deposition of the heat treated polytetrafluoroethylenated active carbon on a filter paper or like medium.
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Grun Charles
Solomon Frank
Anderson Philip E.
Ban Woodrow W.
Diamond Shamrock Corporation
Hazzard John P.
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