Patent ID: 9322477
Filing Date: 2016-04-26
CPC Classification: C09K,F16J

Claim Text:
1. A vehicle transmission oil seal comprising: an elastic member with a seal lip portion having at least a main lip portion, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the main lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition and having an average diameter of 5 to 20 μm, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene and has a melting point of 120° C. to 340° C., the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride, and a ratio (P