Heat-seal films and method of manufacture
AssigneeFina Technology, Inc.
InventorsAiko Hanyu, Scott D. Cooper, Mark Miller
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Abstract
A heat-seal polymer film and method of forming such film is provided. The heat-seal film is formed from metallocene-catalyzed isotactic random copolymers of propylene and at least one other C2 to C8 alpha olefin, such as ethylene random. Such films show improved heat-seal characteristics, such as reduced seal initiation temperatures (SIT's) and improved heat-seal strength, as well as other improved properties.
Claims42
A heat-seal polymer film comprising a layer of film formed from a metallocene-catalyzed isotactic random copolymer of propylene and at least one other C2 to C8 alpha olefin.
A multi-layer polymer film comprising a polyolefin core layer and at least one heat-seal layer formed from a metallocene-catalyzed isotactic random copolymer of propylene and at least one other C2 to C8 alpha olefin that is joined to the polyolefin core layer.
A material for use in heat-seal applications comprising a metallocene-catalyzed isotactic random copolymer of propylene and at least one other C2 to C8 alpha olefin.
A method of forming a heat-seal film comprising:
- providing a metallocene-catalyzed isotactic random copolymer of propylene and at least one other C2 to C8 alpha olefin;
- and
- forming the random copolymer into a layer of film.
Dependencies are inferred from the claim text.