| abstract |
(57) [Abstract] [PROBLEMS] To provide a stopper for a medical container, which has excellent gas shielding properties, medical hygiene properties, injection molding capability, and excellent productivity. SOLUTION: A heat obtained by melt-mixing an olefin resin, a hydrogenated diene copolymer, and an isobutylene-isoprene copolymer rubber in a specific ratio and dynamically heat-treating in the presence of a crosslinking agent for rubber. Stopper for medical containers made of plastic elastomer. |