BP has developed new barrier resins including Ketomex aliphatic polyketones and Barex resins. Ketomex aliphatic polyketones are olefins and COs that are polymerized in a strictly alternating sequence. Their gas barrier properties are comparable to that of ethylene-vinyl alcohol copolymers (EVOH) and have been successfully co-extruded to produce multi-layer sheets. And thermoformed containers. Barex resin is formed by the polymerization of acrylonitrile and methacrylate in a ratio of 75:25 to the main chain of nitrile rubber. The main components are acrylonitrile, methacrylate and butadiene. Its outstanding advantages are that the barrier properties are not affected by temperature, and its structural characteristics and processability make it useful for making single-layer containers.
Information Source: Plastic Packaging
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