Cavitated Polypropylene Films Having Improved Interfacial Adhesion

Provided is an oriented, opaque polypropylene film, methods of making the oriented, opaque film, and methods of enveloping an article in a VFFS or HFFS unit using the film, the film comprising at least one core layer having a first and second side comprising polypropylene and from 2 wt % to 30 wt %...

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Bibliographische Detailangaben
Hauptverfasser:	OSGOOD, JR. WAYNE ROBERT, LIESTMAN DAVID A
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TRANSPORTING UNPACKING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Provided is an oriented, opaque polypropylene film, methods of making the oriented, opaque film, and methods of enveloping an article in a VFFS or HFFS unit using the film, the film comprising at least one core layer having a first and second side comprising polypropylene and from 2 wt % to 30 wt % calcium carbonate and from 0.5 wt % to 20 wt % of a whitening agent, each based on the weight of the core layer materials; at least one skin layer adhered to each of the first and second sides of the core layer; wherein the film possesses a density within the range from 0.65 g/cc to 0.88 g/cc and an interfacial adhesion of at least 600 g/inch.