| abstract |
40 to 94% by weight of polytetrafluoroethylene powder, 6 to 60% by weight of aromatic polyoxybenzoyl ester-based heat-resistant resin powder, or 40 to 94% by weight of polytetrafluoroethylene powder, heat-resistant resin of aromatic polyoxybenzoyl ester-based A seal ring containing 3 to 30% by weight of a powder and 3 to 30% by weight of a molybdenum disulfide powder or 3 to 30% by weight of a tungsten disulfide powder. Even if is a soft metal, the wear of the mating material can be suppressed, so that a long-term stable sealing effect can be obtained, the friction is low, and the change in the sliding torque is small. Ring that can greatly improve operability and responsiveness, and power with such a seal ring Tearing of the valve device, to provide a shock absorber device which seal is required in an automatic transmission apparatus or reciprocating sliding environment that slides at high speed. |