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US 6,270,912 B1Granted
Multi-layer films with core layer of metallocene-catalyzed polypropylene
AssigneeMobil Oil Corporation
InventorRobert G. Peet
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Abstract
An oriented multi-layer film comprised of a core layer comprising a metallocene-catalyzed substantially isotactic propylene polymer, a first additional layer on a side of the core layer, and a second additional layer on a side of the core layer which side is opposite to the side having the first additional layer. In one embodiment of the invention, the core layer includes a polymerized alicyclic hydrocarbon such as polyterpene.
Claims8
An oriented multi-layer film which comprises:
- (a) a core layer comprising a metallocene-catalyzed substantially isotactic propylene polymer;
- (b) a first additional layer on at least one side of the core layer;
- and
- (c) a second additional layer on a side of the core layer which side is opposite to the side having the first additional layer, wherein the first and second additional layers are Ziegler-Natta catalyzed polypropylene.
1 more element
Dependencies are inferred from the claim text.