Nok Corporation

Hideyuki Huruyama

Akira Yamaguchi

Hiroki Matsui

Toshihiro Higashira

Masayuki Tanida

Hirotaka Mizuta

Shinobu Munekata

Kazuki Takeno

Kenichi Kunieda

Tatsuhiko Watanabe

This invention provides an oil seal that can maintain an excellent friction reduction function over a long period of time, has excellent abrasion resistance, and further has excellent sealing properties. The oil seal comprises a seal lip () formed of a rubber-like elastic material comprising a lip edge part () and an air-side slope () and a sealing fluid-side slope () provided on both sides of the lip edge part (). The air-side slope () has a coating film () on its surface. In the lip edge part () in its portion in contact with a shaft (), a sealing fluid-side rubber part (') and an air-side coating film () are simultaneously brought into contact with the shaft (). The coating film () is preferably formed of a coating agent comprising a fluororesin, a polyethylene resin, an isocyanate-modified polybutadiene resin, and a solvent.

Oil seal and process for producing the same

Growing community of inventors

Fukushima, Japan

Hideyuki Huruyama