ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,217, issued on July 29, was assigned to TOYOBO Co. LTD. (Osaka, Japan).
"Heat-shrinkable polyester film" was invented by Masafumi Inoue (Tsuruga, Japan) and Masayuki Haruta (Tsuruga, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heat-shrinkable polyester film that has (1) a hot-water heat shrinkage of 40% or more in a main shrinkage direction of the film when immersed in hot water of 98deg C. for 10 seconds; (2) a planar orientation coefficient of 0.035-0.070; (3) ethylene terephthalate as a main constituent component and 6-25 mol % diethylene glycol (DEG) constituent in 100 mol % of polyhydric alcohol in all the polyester resin constitutin...