Laminated sheet material for use in the manufacture of containers and pouches

Abstract From the Canadian patent

A packaging sheet for containing foodstuff is proposed which comprises a substrate of synthetic resin and a metallic film layer laminated to the substrate through an adhesive layer and a resin layer having a lower bond strength than the adhesive layer. Food packaging containers using the packaging sheet as a lid and self-standing pouches using the packaging sheet as their side sheets are also proposed. Before such a container or pouch containing food is put into a microwave oven for cooking the metallic film, layer or layers can be removed easily from the substrate.