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. 28, 2025
Filed:
Sep. 12, 2019
Toyo Seikan Co., Ltd., Tokyo, JP;
Masahiro Hongou, Yokohama, JP;
Shie Matsunaga, Yokohama, JP;
TOYO SEIKAN CO., LTD., Tokyo, JP;
Abstract
Provided is a packaging bag in which the difficulty of tearing caused by temperature rising is resolved. The easy to open packaging bag for sealing a laminated film by heat sealing, wherein the laminated film includes an inner layer film, an intermediate layer film having an opening induction flaw formed thereon, and an outer layer film including a biaxially oriented film, and wherein a molecular orientation angle of the outer layer film is less than 49°. Also provided are a laminated film and a pouch having easy to open properties while maintaining excellent barrier properties. The laminated film is obtained by laminating (a) an outer layer film, (b) a barrier layer having an opening induction flaw, and (c) an inner layer film, and has a barrier ink covering the opening induction flaw in the barrier layer.