Compounding and molding process for fuel cell collector plates
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United States of America Patent
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app pub date -
May 17, 2001
filing date -
Nov 18, 1999
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Abstract
An improved molding process provides highly conductive polymer composite parts have bulk conductivity over 10 S/cm. This conductivity is particularly useful in collector plate for use in fuel cells. The process can include compounding of a mixture of conductive filler with a polymer binder, extruding the mixture after the binder is plasticized to make pellets. The pellets can then be introduced to a dual temperature feed container of an injection molding machine and injected under high pressure and velocity into the mold cavity. The resulting parts, and particularly collector plates can be made economically and provide a high conductivity while maintaining strength and chemical resistance properties.
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