公开(公告)号：US20210039371A1

公开(公告)日：2021-02-11

申请号：US17080294

申请日：2020-10-26

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Sayaka HOSHI ,  Junichi KAMINAGA ,  Yuki OMURA ,  Yuka NOMOTO

IPC: B32B27/40 ,  B32B7/12 ,  B32B19/04 ,  B32B27/30

Abstract: A gas barrier film includes: a substrate; and a gas barrier layer located on at least one surface of the substrate, the gas barrier layer containing an aqueous polyurethane resin that contains an acid group-containing polyurethane resin and a polyamine compound, a water soluble polymer, and an inorganic layered mineral, wherein, when a region from a top to a bottom of a cross-section of the gas barrier layer in a thickness direction, which is defined as a first region, is equally divided in the thickness direction into 11 strip regions, and a region different from the first region from a top to a bottom of a cross-section of the gas barrier layer in the thickness direction, which is defined as a second region.