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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 9752325 B1

PDFFull Text
Date of Patent:
Sep. 05, 2017

Filed:

Jun. 08, 2012

Multi-layer film having a high puncture resistance and resistance to further tearing

Applicant:

Heinz Engelhard, Nuremberg, DE;

Inventor:

Heinz Engelhard, Nuremberg, DE;

Assignee:

Infiana Germany GmbH & Co. KG, Forchheim, DE;

Attorney:

Crowell & Moring LLP

Primary Examiner:

Callie Shosho

Assistant Examiner:

John Freeman

Int. Cl.
CPC ...
B32B 27/32 (2006.01); B32B 27/34 (2006.01); E04D 5/10 (2006.01); B32B 11/04 (2006.01); B32B 27/06 (2006.01); B32B 27/08 (2006.01); B32B 27/28 (2006.01); C08L 23/10 (2006.01); C08L 23/12 (2006.01); C08L 23/14 (2006.01); C08L 77/06 (2006.01); C09J 7/02 (2006.01);
U.S. Cl.
CPC ...
E04D 5/10 (2013.01); B32B 11/04 (2013.01); B32B 27/06 (2013.01); B32B 27/08 (2013.01); B32B 27/28 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); C08L 23/10 (2013.01); C08L 23/12 (2013.01); C08L 23/142 (2013.01); C08L 77/06 (2013.01); C09J 7/0296 (2013.01); C09J 2201/162 (2013.01); C09J 2423/006 (2013.01); C09J 2477/006 (2013.01); Y10T 428/2848 (2015.01); Y10T 428/31757 (2015.04);
Abstract

A multi-layer film comprising a layer (a) and a layer (c), each layer comprising at least one propylene copolymer in a quantity of at least 30% by weight and at least one propylene homopolymer in a quantity of at least 20% by weight, in each case relative to the total quantity of the layer (a) or (c), at least one inner layer (b) based on at least one homo- and/or co-polyamide having isophorondiamine units as polyamide components, and further comprising adhesion promoter layers (d) and (e) arranged between the layers (a) and (b) and between the layers (b) and (c), respectively, each adhesion promoting layer being based on at least one modified thermoplastic olefin homopolymer or olefin copolymer; a sealing sheet comprising such a multi-layer film, and the use of such a multi-layer film for covering roofs.

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