IMPROVED MULTILAYER BLOWN FILMS

Coextruded multilayer blown films are produced comprising: a core layer comprising at least one random polypropylene copolymer; at least one skin or intermediate layer adjacent to said core layer; wherein the coextruded multilayer film has at least 30% higher machine direction tear, at least 30% imp...

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Bibliographische Detailangaben
1. Verfasser:	FALLA, DANIEL J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Coextruded multilayer blown films are produced comprising: a core layer comprising at least one random polypropylene copolymer; at least one skin or intermediate layer adjacent to said core layer; wherein the coextruded multilayer film has at least 30% higher machine direction tear, at least 30% improved tear ratio (machine direction tear divided by transverse direction tear) and at least 10% lower film haze, relative to a similar multilayer film comprising at least one impact polypropylene copolymer in the core layer.