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    • 1. 发明申请
    • METAL CAP AND METHOD FOR MANUFACTURING SAME
    • US20230019020A1
    • 2023-01-19
    • US17911858
    • 2021-03-10
    • NIPPON CLOSURES CO., LTD.
    • Sei NAKAGAWADaisuke TSUCHIMOTO
    • B65D41/02B65D51/24
    • The present invention relates to a metal cap that has an adhesive inner surface coating film and a masking layer that can be formed in the same step thereby exhibiting excellent productivity, and a method for manufacturing the same. 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 that is adhesive to the olefin resin liner and a non-adhesive portion that is non-adhesive or weakly adhesive to the olefin resin liner. The adhesive portion of the coating film is formed by positioning the adhesive component of the coating composition on the coating film surface. The non-adhesive portion of the coating film 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 of the coating composition is a dispersion phase and the base resin is a continuous phase.