| 摘要 |
A plastic closure that comprises a closure body having a base wall (30) with a peripheral skirt (32) with threads (34) on the skirt for securing the closure to a container. A liner (46, 46a or 46b) may be secured to the interior of the closure body, preferably by being compression molded in situ on the base wall. The closure base wall consists essentially of a multiplicity of layers (43 or 50) of a matrix polymer material such as PP alternating with a multiplicity of layers (44 or 56) of a barrier material such as EVOH to resist transmission of gas, water vapor and/or flavorants through the closure. Layers (52) of a compatibilizer material, such as a maleic anhydride grafted polymer, preferably are disposed between the matrix and barrier layers to tie the matrix polymer material to the barrier material.
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