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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 9669591 B1

PDFFull Text
Date of Patent:
Jun. 06, 2017

Filed:

Nov. 11, 2013

Heat sealable film with linear tear properties

Applicant:

Toray Plastics (America), Inc., N. Kingstown, RI (US);

Inventors:

Harold Egon Koehn, North Kingstown, RI (US);

Matthew H. Brown, Wakefield, RI (US);

Assignee:

TORAY PLASTICS (AMERICA), INC., N. Kingstown, RI (US);

Attorney:

Morrison & Foerster LLP

Primary Examiner:

Sheeba Ahmed

Int. Cl.
CPC ...
B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); C08L 23/16 (2006.01); C08L 23/06 (2006.01); C08K 3/36 (2006.01); C08K 3/34 (2006.01); B29D 7/01 (2006.01); C09J 7/02 (2006.01); B29C 47/06 (2006.01); C08L 23/14 (2006.01); B29C 47/00 (2006.01); B29K 23/00 (2006.01);
U.S. Cl.
CPC ...
B29D 7/01 (2013.01); B29C 47/0021 (2013.01); B29C 47/065 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/32 (2013.01); C08L 23/06 (2013.01); C08L 23/142 (2013.01); C08L 23/16 (2013.01); C09J 7/0203 (2013.01); B29C 47/0004 (2013.01); B29K 2023/0633 (2013.01); B29K 2023/12 (2013.01); B32B 2255/10 (2013.01); B32B 2255/205 (2013.01); B32B 2264/102 (2013.01); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/516 (2013.01); B32B 2307/558 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/734 (2013.01); B32B 2307/736 (2013.01); B32B 2439/00 (2013.01); B32B 2439/70 (2013.01); C08K 3/34 (2013.01); C08K 3/36 (2013.01); Y10T 428/24843 (2015.01); Y10T 428/2804 (2015.01); Y10T 428/2826 (2015.01);
Abstract

A monoaxially oriented film including an ethylene-propylene copolymer elastomer, a non-elastomeric propylene-based random copolymer, and a low density polyethylene, which is oriented at least about 2.5 times in one direction and exhibits excellent linear directional tear properties parallel to the orientation direction, excellent heat seal performance in terms of high heat seal strengths and low seal initiation temperature, and is less than 50 μm in thickness after orientation. This 'thin' film formulation and orientation is suitable for pouch applications requiring an 'easy-tear' linear tear feature and excellent hermetic seal properties.

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