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US 2018/0001609 A1Published application
Multilayer, Heat-Shrinkable Film Comprising a Plurality of Microlayers
OwnerJanet Rivett, Bradley Daley +1inventors
InventorsJanet Rivett, Bradley Daley, Greg Harwood
Life of this patent
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Abstract
A multilayer, heat-shrinkable film generally includes at least one bulk layer and a microlayer section comprising a plurality of microlayers. The film has a sufficiently low shrink force to wrap fragile items, such as furnace filters.
Claims16
A multilayer, heat-shrinkable film, comprising:
- a. a bulk layer;
- and
- b. a microlayer section comprising at least ten microlayers,
- wherein:
- each of the microlayers and the bulk layer have a thickness, the thickness of any of the microlayers being at least half the thickness of the bulk layer;
- the film has a film density of less than or equal to 0.911 g/cc;
- and
- the microlayer section comprises a repeating sequence of layers represented by the structure:
- A/B,
- wherein,
- A represents a microlayer comprising a blend of two or more different polymers, at least one of which is polypropylene copolymer, and
- B represents a microlayer comprising a polymer or polymer blend having a composition that is different from that of A.
9 more elements
A multilayer, heat-shrinkable film, comprising:
- a. a bulk layer;
- and
- b. a microlayer section comprising at least ten microlayers,
- wherein:
- each of the microlayers and the bulk layer have a thickness, the thickness of any of the microlayers being at least half the thickness of the bulk layer;
- the film has a film density of less than or equal to 0.940 g/cc;
- and
- the microlayer section comprises a repeating sequence of layers represented by the structure:
- A/B,
- wherein,
- A represents a microlayer comprising cyclic olefin copolymer, and
- B represents a microlayer comprising a polymer or polymer blend having a composition that is different from that of A.
9 more elements
Dependencies are inferred from the claim text.