SEALING INSERT FOR A PLASTIC CLOSURE, PLASTIC CLOSUREINCORPORATING SUCH INSERT, METHOD OF MAKING SUCH INSERT AND METHOD OF MAKING A PLASTIC CLOSURE

摘要

A plastic closure that includes a cap having a base with a peripheral skirt defining a cap interior and threads on the skirt for securing the closure to a container. A liner is secured to the interior of the cap, preferably by compression molding in situ. The liner consists essentially of a blend of a matrix polymer, a particulate barrier polymer and an compatibilizer. The heat and pressure of compression forms the particles of barrier polymer into platelets that are oriented essentially parallel to the plane of the disk.