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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 10639873 B1

PDFFull Text
Date of Patent:
May. 05, 2020

Filed:

Mar. 17, 2018

Heat sealing polyester films with low coefficient of friction

Applicant:

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

Inventors:

Gerardo Eugenio Rada Murga, Warwick, RI (US);

Jan Moritz, Bristol, RI (US);

Kari Shoolbraid, Pawtucket, RI (US);

Assignee:

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

Attorney:

Rogowski Law LLC

Primary Examiner:

Vivian Chen

Int. Cl.
CPC ...
B32B 27/36 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 7/12 (2006.01); B32B 27/18 (2006.01); B32B 7/04 (2019.01); C08L 67/03 (2006.01); C09D 167/02 (2006.01); C09D 167/03 (2006.01); C09D 167/00 (2006.01); C08L 67/02 (2006.01); C08K 3/013 (2018.01); C08L 67/00 (2006.01); C08K 3/36 (2006.01); B29C 48/00 (2019.01); B29C 55/12 (2006.01); B29K 67/00 (2006.01); B29K 105/00 (2006.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01);
U.S. Cl.
CPC ...
B32B 27/36 (2013.01); B29C 48/0018 (2019.02); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B29C 55/12 (2013.01); B29K 2067/003 (2013.01); B29K 2067/006 (2013.01); B29K 2105/0008 (2013.01); B29K 2995/0017 (2013.01); B29K 2995/0053 (2013.01); B32B 7/04 (2013.01); B32B 7/12 (2013.01); B32B 27/18 (2013.01); B32B 2250/02 (2013.01); B32B 2250/24 (2013.01); B32B 2250/244 (2013.01); B32B 2307/31 (2013.01); B32B 2307/702 (2013.01); B32B 2307/704 (2013.01); B32B 2307/746 (2013.01); B32B 2367/00 (2013.01); C08K 3/013 (2018.01); C08K 3/36 (2013.01); C08L 67/00 (2013.01); C08L 67/02 (2013.01); C08L 67/03 (2013.01); C08L 2205/02 (2013.01); C09D 167/00 (2013.01); C09D 167/02 (2013.01); C09D 167/03 (2013.01); Y10T 428/265 (2015.01); Y10T 428/268 (2015.01); Y10T 428/2813 (2015.01); Y10T 428/2817 (2015.01); Y10T 428/2826 (2015.01); Y10T 428/31786 (2015.04);
Abstract

Coextruded biaxially oriented sealable polyester films having at least one heat-sealable layer and at least one base layer. The heat-sealable layer has a sealing temperature on APET or PETG trays of at least 250° F. (121° C.) for seal strength of at least 1,500 g/in of film width, and a static and dynamic coefficient of friction of 0.28 or less. The heat-sealable layer includes one or more amorphous polyesters and one low melting point crystallizable polyester, such as polybutylene terephthalate (PBT).

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