ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,907, issued on Aug. 12, was assigned to TOYOBO Co. LTD. (Osaka, Japan).
"Biaxially oriented polypropylene film" was invented by Kouji Yamada (Otsu, Japan), Kazuhito Horinouchi (Otsu, Japan), Mahiro Nakano (Inuyama, Japan) and Toru Imai (Inuyama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a biaxially oriented polypropylene film with a storage elastic modulus (E'-23) of at least 2.0 GPa in a longitudinal direction and at least 6.0 GPa in a width direction, a storage elastic modulus E' (E'-80) of at least 1.0 GPa in the longitudinal direction and at least 3.0 GPa in the width direction, a ratio (E'-80/E'-23) of E'-80 to...