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US 4,729,910 AGranted
Reinforced flexible graphite sheet
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsHiroyuki Fukuda, Masatomo Shigeta, Hisatsugu Kaji, Kuniyuki Saitoh
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Abstract
Disclosed herein is a reinforced flexible graphite sheet uniformly containing a thermosetting resin prepared by impregnating a flexible graphite sheet with a liquid thermosetting resin having the carbonizing yield of more than 20% under a reduced pressure and thereafter, heat-setting the resin, an amount of the resin impregnated being in the range of 0.5 to 20% by weight based on the flexible graphite sheet.
Claims7
A process for preparing a reinforced flexible graphite sheet which comprises:
- (a) subjecting a flexible graphite sheet and a solution of phenolic resin adhesive to preliminary de-aeration treatment in a pressure reduction device;
- (b) immersing the flexible graphite sheet subjected to the preliminary de-aeration treatment into the solution of phenolic resin adhesive subjected to the preliminary de-aeration treatment;
- (c) subjecting the immersed sheet and the adhesive solution to a pressure reducing treatment comprising (i) disposing the graphite sheet impregnated with the adhesive solution together with the vessel containing the adhesive solution in the pressure reduction device, and (ii) subjecting the sheet and solution to subsequent de-aeration treatment;
- (d) taking the graphite sheet out of the pressure reduction device;
- (e) removing adhesive deposited on the surfaces of the sheet;
- and
- (f) hardening the adhesive using a hot press.
4 more elements
Dependencies are inferred from the claim text.