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:
Apr. 05, 2022
Filed:
Jul. 14, 2017
Toyo Seikan Group Holdings, Ltd., Tokyo, JP;
Toyo Seikan Co., Ltd., Tokyo, JP;
Satoshi Kawamura, Yamaguchi, JP;
Jiro Tomita, Yamaguchi, JP;
Takafumi Ohsawa, Kanagawa, JP;
Yoshihiro Ohta, Kanagawa, JP;
Takuya Hara, Kanagawa, JP;
Toyo Seikan Group Holdings, Ltd., Tokyo, JP;
Toyo Seikan Co., Ltd., Tokyo, JP;
Abstract
This invention provides an easy-to-tear resin film. Such easy-to-tear resin film is an easy-to-tear, unstretched resin film composed of a blend of a polyethylene terephthalate-based resin with the second resin having a difference in SP value from the polyethylene terephthalate-based resin of 1.1 to 4.0 (cal/cm). This invention also provides a laminate filmB for a packaging material comprising the easy-to-tear, unstretched resin filmbetween the inner layer filmserving as a heat seal surface and the surface layer filmcomprising an isophthalic acid-modified polyethylene terephthalate resin having a copolymerization ratio of isophthalic acid component of 0 mol % to 5 mol %.