Abstract: The invention provides a peelable laminated structure suitable for use in a peelable seal joining a flexible closure element (23) to a container (20) or in foil/polymer laminates used for packaging and the like. The structure comprises a porous-anodizable metal substrate (11) and a porous anodic film (12) overlying and attached to a surface of the substrate. The porous anodic film (12) has a weakened stratum (19) positioned between an outer film part and an underlying structure including the metal substrate (11). The weakened stratum (19) is strong enough in use of said structure to prevent detachment of the outer film part from the underlying structure, except by deliberate peeling of the flexible closure element (23). The invention also relates to a process for producing the structure and to peelable containers and recyclable laminates incorporating the structure.

Abstract: Susceptors used for browning or crisping food prepared in microwave ovens and processes for the production of such susceptors. The susceptors are produced by laminating an anodizable metal (e.g. aluminum, tantalum, niobium, zirconium, titanium or tungsten) onto a suitable non-metallic substrate (e.g a heat resistant polyester film, a paperboard sheet or a glass, plastic or ceramic article) and anodizing the metal layer to form an anodic film covering a residual metal layer of suitable thinness to generate heat by resistance heating when irradiated by microwaves. The anodic film acts as a barrier to prevent the migration of any degradation products to the foodstuff undergoing the heating procedure. The susceptors can be used as wrappings for food items, as package inserts or as internal coatings on food containers and the like.