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US 10,093,082 B2Granted
Transparent polyolefin film
AssigneeTreofan Germany GmbH & Co. KG
InventorsDetlef Hütt, Mathias Roth
Life of this patent
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Abstract
The invention relates to a peelable, transparent multilayered polyolefin film having a first cover layer I and a second sealable cover layer II. The cover layer I contains a mixture of propylene copolymers and/or propylene terpolymers and an ethylene-butylene copolymer and has a roughness of 0.1 to <2 μm. The second sealable cover layer II contains propylene homopolymers and propylene copolymers II having a seal initiation temperature of 105 to 135° C.
Claims11
A peelable multilayered polyolefin film formed of a transparent base layer and a first cover layer I and a second sealable cover layer II, wherein
- (I) the first cover layer I contains a mixture of
- (a) at least one propylene copolymer from propylene and ethylene or butylene units and/or propylene terpolymer I from propylene, ethylene and butylene units, and
- (b) at least one ethylene-butylene copolymer
- and the surface of this cover layer I has a roughness Rz of 0.1 to <2 μm at a cut-off of 0.25 mm, measured according to ISO4287, and
- (II) the second sealable cover layer II contains a mixture of
- (a) a propylene homopolymer and
- (b) a propylene copolymer II having a seal initiation temperature of 105 to 135° C.;
- wherein the film has sealing seam strengths in a range of 0.4 to 1.5 N/15 mm when the cover layer I is sealed against the cover layer II with a sealing pressure of 1.5 N/cm2 and a sealing time of 0.5 sec in a temperature range of 120 to 150° C.
5 more elements
Dependencies are inferred from the claim text.