US Patent Issued to TOPPAN HOLDINGS on Nov. 3 for "Barrier film, laminate, and packaging bag" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,779,830, issued on Nov. 3, was assigned to TOPPAN HOLDINGS INC. (Tokyo).

"Barrier film, laminate, and packaging bag" was invented by Miki Fukugami (Tokyo), Ikuko Yamakawa (Tokyo) and Kaoru Furuta (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A barrier film according to the first aspect of the present disclosure contains, in the following order: a base material layer containing polypropylene; a vapor deposition layer containing an inorganic oxide; and a gas barrier layer, in which the base material layer has a multilayer structure in which at least three layers, which are a first skin layer, a core layer, and a second skin layer, are provided in t...