| 摘要 |
In order to improve the sealing property and the resistance to pressure of a gasket coated with foam rubber, a material for the gasket coated with foam rubber is formed by disposing foam rubber layers on both surfaces of a metal plate. The rubber has the property that it is swollen by the medium which is intended to be sealed by the gasket, eg a rubber having a great oil swelling property or an NBR, is used. In this way the sealing property thereof is improved. A preferred rubber composition comprises an NBR having a nitrile amount lower than 30% and a Mooney viscosity greater than 60. <IMAGE> |
