Patent ID: 7834096

Claim:
A process for preparing a perfluoroelastomer seal material comprising a step of treating a perfluoroelastomer molded article with a solvent having at least 50% of a swelling rate based on said molded article, when said molded article is immersed at 60° C. for 70 hours, wherein said molded article is obtained by crosslinking a perfluoroelastomer through at least one crosslinking system selected from the group consisting of an imidazole crosslinking system, a triazine crosslinking system, an oxazole crosslinking system and a thiazole crosslinking system, wherein a volume of the untreated molded article is C as measured by the underwater substitution method, a volume of the molded article in a state of swelling is D and the swelling rate of the molded article is calculated by [(D−C)/C]×100(%).