Abstract: A gasket integrated with a cover wherein a gasket material composed of a thermoplastic elastomer composition is integrally fixed to the cover having a shape of multistep contraction over at least two contraction steps, a gasket wherein the cover and the gasket are integrally molded and after molding, are subjected to a heating treatment at a temperature not lower than the temperature at which an adhesive component in materials constituting the gasket initiates crystal fusion or glass transition, or a gasket wherein the cover and the gasket are integrally molded and a covering layer composed of a fluoropolymer is formed on the gasket surface on atmospheric side are proposed. According to the present invention, a gasket integrated with a cover for a hard disc device which gasket is excellent in adhesive property and productivity, and is minimized in permeability and penetration of substances is provided.

Abstract: A crush stop comprising a thermoplastic elastomer composition which has a hardness as measured with a hardness tester type A in accordance with JIS-K-6253 being at least 50 degrees and which has dependence of elastic modulus upon temperature being at most 3 times between 0° C. and 60° C. The crush stop is minimized in the displacement due to impact of a stopper arm, and is excellent in impact absorbing properties over a wide range of temperatures.