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US 12,617,191 B2Granted
Multilayer polyolefin films and methods for their production
AssigneeAvery Dennison Corporation
InventorsVenu M. Konduru, John E. Kovalchuk, Meng Li, Hoang T. Pham, Jihui Shang
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Abstract
Multilayer films comprising polyolefins and products comprising the multilayer films are disclosed. These multilayer films have fewer defects, especially optical defects.
Claims5
A multilayer film, comprising:
- a core layer having a first side and second side;
- a first skin layer on the first side of the core layer;
- a second skin layer on the second side of the core layer;
- a first tie coat between the core layer and the first skin layer;
- and
- a second tie coat between the core layer and the second skin layer;
- wherein the multilayer film is oriented only in a machine direction;
- and
- wherein the multilayer film is cavitated;
- wherein the first tie layer and the second tie layer each comprise:
- about 60% by weight to about 99.8% by weight, based on the total weight of the tie layer, polypropylene;
- about 0.1% by weight to about 10% by weight, based on the total weight of the tie layer, ethylene vinyl acetate;
- and
- about 0.1% by weight to about 20% by weight, based on the total weight of the tie layer, filler.
11 more elements
Dependencies are inferred from the claim text.