| 摘要 |
A plastic closure for sealing containers which have been filled with contents that are hot or which are to be retorted. The closure is made of thermosetting or thermoplastic material. The closure includes a base wall and a peripheral skirt. The skirt is formed for engaging a container. The base wall of the closure having an inner surface with a liner thereon. A reactive hot melt adhesive bonds the liner to the inner surface. The reactive hot melt adhesive is cross-linkable such that after the liner is applied and the adhesive cures, the adhesive bonds the liner to the inner surface of the base wall of the closure such that the liner will withstand and resist deformation under vacuum caused by cooling of the hot contents in a container or caused by retorting the contents of a container and subsequent cooling. The reactive hot melt adhesive may be a cross-linkable adhesive selected from the group consisting of polyurethane and silicone. The liner being adhered may be made of ethylene, polypropylene, alpha -olefin copolymers, i.e. ethylene-octane, propylene-ethylene or butylene-ethylene and SBR rubber. |
