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US 11,235,562 B2Granted
Recyclable PE packaging film with improved stiffness
AssigneeConstantia Pirk GmbH & Co. KG
InventorsAchim Grefenstein, Pragnesh Shah, Saket Jha
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Abstract
The present teaching concerns a recyclable co-extruded PE packaging film with a first laminate layer of at least 60 vol % HDPE and a second laminate layer of a hetero-phase polypropylene block copolymer with a polyethylene content of 5-30 wt. % and a melting point higher than 155° C., preferably higher than 160°, the thickness of the second laminate layer being less than 5 μm.
Claims15
A recyclable polyethylene film with:
- a first laminate layer of at least 60 vol % HDPE, and
- a second laminate layer made of polypropylene, which is attached to the first laminate layer by co-extrusion to form the polyethylene film, with the thickness of the polyethylene film being less than 40 μm,
- wherein the polypropylene of the second laminate layer is a hetero-phase polypropylene block copolymer with a polyethylene content of 5-30 wt. % and has a melting point higher than 155° C. while the thickness of the second laminate layer is less than 5 μm.
Dependencies are inferred from the claim text.