Patent ID: 12006100

Abstract:
A metal cap that has an adhesive inner surface coating film and a masking layer. A coating film of a coating composition containing an adhesive component in a base resin and a masking agent is formed between the top plate portion inner surface of the metal cap shell and the olefin resin liner. The coating film has an adhesive portion adhesive to the olefin resin liner and a non-adhesive portion non-adhesive or weakly adhesive to the olefin resin liner. The adhesive portion is formed by positioning the adhesive component on the coating film surface. The non-adhesive portion has the masking layer of the masking agent at a side facing the metal cap shell, such that a sea-island structure is formed on the coating film surface corresponding to the masking layer, in which the adhesive component is a dispersion phase and the base resin is a continuous phase.