A film having a polypropylene surface layer and a polyethylene surface layer is used in fill and seal packaging applications, in which the polyethylene layer consists essentially of a ethylene copolymer having a narrow molecular weight distribution ethylene and a CBDI of greater than 50%. The package...http://www.google.com.au/patents/US6094889?utm_source=gb-gplus-sharePatent US6094889 - Method of form and seal packaging
