| 摘要 |
A stopper (100; 100′) for closing a container, comprising a main body (1; 1′) shaped so as to be removably housed and engaged in an opening of said container, and extending along a longitudinal axis (X) thereof between two opposed base surfaces (2, 3) which face the outside and the inside of the containers, respectively, when said main body (1; 1′) is housed and engaged in said opening, said stopper (100; 100′) comprising a barrier element (4; 4′) made from a material with high impermeability to gases and provided on a transverse surface portion (5) of said stopper (100; 100′) positioned transversely with respect to said longitudinal axis (X) so as to intercept the flow of gas through said stopper (100; 100′), said barrier element (4; 4′) being intended to reduce the passage of gas through said stopper (100), characterized in that said barrier element (4, 4′) comprises a plastic barrier layer (41; 43) made from polyisobutylene-based elastomers, preferably SIBS and/or TPV and/or TPU, or from aluminium and/or alloys thereof, or from tin and/or alloys thereof, or EVOH or PVDC. |
