ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,830, issued on April 14, was assigned to TOYOBO Co. LTD. (Osaka, Japan).
"Biaxially oriented polypropylene film" was invented by Kazuhito Horinouchi (Otsu, Japan), Kouji Yamada (Otsu, Japan), Kensuke Taneki (Inuyama, Japan) and Toru Imai (Inuyama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a biaxially oriented polypropylene film that has high stiffness and can easily retain a bag shape when made into a packaging bag even if the film is made thinner, and at the same time, that can maintain water vapor barrier properties even if the film is made thinner, and has few wrinkles in and around the sealed portion when heat-sealed to m...