Gasket and medical device using the same.

摘要

A gasket is made of a composite comprising hydrogen-added derivative (component a) of styrene-butadiene block copolymer, plasticizer (component b), and a polyethylene resin having a density of 0.940g/cm<3> or more (component c). A medical device includes a cylindrical body and a gasket capable of moving in closely contact with the inner surface of the cylindrial body. And the gasket of the medical device is the same of the aforesaid type of the gasket.