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.:
Date of Patent:
Oct. 01, 2019
Filed:
Dec. 29, 2017
Applicant:
Toppan Printing Co., Ltd., Tokyo, JP;
Inventors:
Shunsuke Yajima, Tokyo, JP;
Akira Yoshifuji, Tokyo, JP;
Assignee:
TOPPAN PRINTING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/14 (2006.01); B32B 27/36 (2006.01); B32B 1/02 (2006.01); B32B 27/16 (2006.01); B65D 75/26 (2006.01); C08J 5/18 (2006.01); B29C 71/02 (2006.01); B65D 65/14 (2006.01); C08J 7/12 (2006.01);
U.S. Cl.
CPC ...
B32B 5/147 (2013.01); B32B 1/02 (2013.01); B32B 5/14 (2013.01); B32B 27/16 (2013.01); B32B 27/36 (2013.01); B65D 65/14 (2013.01); B65D 75/26 (2013.01); C08J 5/18 (2013.01); C08J 7/08 (2013.01); C08J 7/123 (2013.01); B32B 2250/02 (2013.01); B32B 2307/31 (2013.01); B32B 2367/00 (2013.01); B32B 2439/46 (2013.01); C08J 2367/02 (2013.01);
Abstract
A film having heat sealing properties, a packaging bag using the film and a method of imparting heat sealing properties to the film are provided. The film is made up of a single layer of biaxially stretched polyester or made up of a laminate including the layer of biaxially stretched polyester at a surface. The layer of biaxially stretched polyester includes a non-sealing portion having no heat sealing properties, and a sealing portion having heat sealing properties due to irradiation of laser light and exhibiting lower crystallinity compared to that of the non-sealing portion.