Heat sealing composition used for making closure plugs comprises acetate polymer adhesive constituent and block polyether constituent forming carcass

摘要

Heat sealing composition of type comprising adhesive constituent and constituent forming carcass is claimed. Heat sealing composition of type comprising adhesive constituent and constituent forming carcass is claimed in which the adhesive is vinyl ethylene-acetate (EVA)/maleic anhydride copolymer optionally modified with polyethylene or is polypropylene and EVA copolymer modified by epoxy groups; and the carcass constituent is block polyether ester (COPE) and block polyether amine (PEBA) optionally mixed with ethylene/propylene copolymer which can be replaced wholly or partially by an ethylene/propylene/diene terpolymers (EPDM). An Independent claim is also included for a closure plug made from said composition.