公开(公告)号：US20210292503A1

公开(公告)日：2021-09-23

申请号：US17339078

申请日：2021-06-04

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Junichi KAMINAGA ,  Sayaka HOSHI ,  Yuki OMURA ,  Seiya SUZUKI ,  Yoshiki KOSHIYAMA

IPC: C08J7/048 ,  C08J5/18 ,  C08J7/04 ,  C09D175/12 ,  C09D7/61 ,  B65D65/42

Abstract: A gas barrier film including a substrate film containing a resin, and a gas barrier layer that has oxygen barrier properties and is in contact with at least one surface of the substrate film, a surface of the gas barrier layer has a flat portion, and a plurality of protrusions that protrude from the flat portion. The number of protrusions that satisfy the following formula (1) is 0 to 200 per mm2, and the number of protrusions that satisfy the following formula (2) is 20 or more per mm2: d×2≤f (1); and 0.2≤f