PROCESS FOR PRODUCING PACKAGING LAMINATE MATERIAL

摘要

A process for producing a weblike laminate material for packaging container composed of a base layer and a thermally sealable inner layer, comprising the steps of introducing an oxygen-containing gas in a silver vapor atmosphere; carrying a weblike base film in the silver vapor atmosphere so as to form a thin film of metallic silver on a surface of the weblike base film; oxidizing the thin film into a thin film of silver oxide; drawing out the base film provided with the thin film of silver oxide from the silver vapor atmosphere to thereby obtain a weblike base layer; laminating an inner face of the weblike base layer with a thermally sealable inner layer, while printing a container design on an outer face of the weblike base layer; and forming a thermoplastic layer or a support layer on the outer face and inner face of the weblike base layer. Formation of the seal zone, vicinity thereof and entirety of container can be carried out in an antibacterial atmosphere or with an antibacterial material.