SANITARY PIPING GASKET AND MANUFACTURE THEREOF

摘要

PURPOSE:To provide a sanitary piping gasket excellent in heat resistance and chemical resistance further with a high compression restoring rate, having a stable high seal characteristic for a long period in a production device for medicines or the like. CONSTITUTION:In a sanitary piping gasket 1 which is a disk annular body of concentrically hollowing the center part to provide a predetermined thickness, having protruded parts (3) above and below a disk part (2) concentrically circular annularly with the annular body, the sanitary piping gasket is formed integrally of porous polytetrafluoroethylene with density of the disk part (2) 1.0 to 1.9g/cm<3> and density of the protruded part (3) 0.3 to 1.4g/cm<3>.