A new polypropylene random copolymer has been designed to address growing demand for high-performance transparent blown film. Basell claims that the resin, based on its Spherizone process technology, achieves a unique combination of optical properties, high stiffness, low gel and odour levels and good sealing performance for laminated film and transparent packaging film applications. A high thermal resistance and allows for the introduction of a thermal sealing gradient. This allows the flexible design of lamination film at variable thicknesses. Potential applications include retortable food pouches and high clarity thin film for packaging baked goods, biscuits and vegetables.
Trials have produced films with true polypropylene-like clarity. In high-clarity film trials, various three-layer co-extruded structures were produced. The internal polyolefin layer is based on a combination of polypropylene, polyethylene and advanced polyolefins to meet demanding application requirements. Basell claims that Clyrell RC 1314 resin is processed into blown film without a visible crystallisation line or film structure, and with impressive transparency devoid of a milky taint.
11-Feb-05 
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