Multilayer structure for packaging food products and method of manufacture

摘要

A coextruded multilayer structure for use in food packaging comprises two or more layer of which one is a polypropylene and polyetheramide based antistatic compound and another is a structure layer comprising a mixture of maleic anhydride grafted onto a polypropylene homopolymer and a polypropylene copolymer. <??>A coextruded multilayer structure for use in food packaging comprises two or more layer of which one (A) is a polypropylene and polyetheramide based antistatic compound and another (B) is a structure layer comprising a mixture of maleic anhydride grafted onto a polypropylene homopolymer and a polypropylene copolymer. <??>The structure may comprise a further structure layer (C) comprising polypropylene and a food contact layer (D) outside (C) and comprising polypropylene with fluidity greater than (B) and (C). Layers (B) and (C) are intercalated with an oxygen barrier layer (E) bonded to each of them with an adhesive layer (L) comprising maleic anhydride grafted to polypropylene. A further structure layer (F) may be present between (L) and (C). Structure layer (B) may consist of a fourth structure layer (F) and an adhesive layer to bond it to antistatic layer (A). <??>An Independent claim is included for a method of manufacturing the claimed structure comprising introducing the components into extruders, feeding the material from the extruders into a distributor