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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11440300 B1

PDFFull Text
Date of Patent:
Sep. 13, 2022

Filed:

Jul. 22, 2019

Multilayer polyproylene film

Applicant:

Borealis Ag, Vienna, AT;

Inventors:

Markus Gahleitner, Linz, AT;

Jingbo Wang, Linz, AT;

Friedrich Berger, Linz, AT;

Manfred Gruenberger, Linz, AU;

Assignee:

BOREALIS AG, Vienna, AT;

Attorney:

Tarolli, Sundheim, Covell & Tummino LLP

Primary Examiner:

Lawrence D Ferguson

Int. Cl.
CPC ...
B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); C08F 210/06 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01);
U.S. Cl.
CPC ...
B32B 27/08 (2013.01); B32B 27/302 (2013.01); B32B 27/32 (2013.01); C08F 210/06 (2013.01); B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B29K 2023/14 (2013.01); B29K 2105/0085 (2013.01); B29K 2105/0094 (2013.01); B32B 2250/03 (2013.01); B32B 2250/246 (2013.01); B32B 2270/00 (2013.01); B32B 2274/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/414 (2013.01); B32B 2307/546 (2013.01); B32B 2307/732 (2013.01); B32B 2439/40 (2013.01);
Abstract

Multilayer film comprising at least a skin layer, a core layer and an inner layer, the skin layer comprising a homo polypropylene or a random propylene ethylene copolymer including up to 2.5 wt.-% units derived from ethylene, the homopolypropylene or the random propylene ethylene copolymer having a MFR2 (ISO1 133, 230° C.) of 2.0 to 20 g/10 min and a melting temperature (Tm) of above 148° C. measured by DSC according to ISO 11357-3:1999 and a scan rate of 10° C./min; the core layer comprising a mixture obtainable by melt blending 20 to 100 wt.-% of a random heterophasic copolymer and 0 to 80 wt.-% of styrene based TPE, whereby the random heterophasic copolymer has a melting temperature (Tm) of 134° C.-148° C. measured by DSC according to ISO 11357-3:1999 and a scan rate of 10° C./min and includes a propylene ethylene copolymer rubber; and whereby the styrene based TPE has a styrene content of from 5 to 20 wt.-%, and the inner layer comprising a random propylene ethylene copolymer having a melting temperature (Tm) from 132° C. to 144° C. measured by DSC according to ISO 11357-3:1999 and a scan rate of 10° C./min, wherein the multilayer film is free of phthalic acid esters as well as decomposition products thereof.

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