Linerless plastic vacuum closure.

摘要

A molded plastic closure cap (1) is disclosed having integrally molded plastic fin or rib members (7) for sealing a container and also having a layer (9) of a softer sealing material applied to the members to improve the seal, as, for example, to include vacuum sealing capability. The softer sealing materials include plastisol formulations characterized by their having a fusing temperature safely below that which would shrink the molded closures which include polyolefin closures.