公开(公告)号：US12269240B2

公开(公告)日：2025-04-08

申请号：US17829976

申请日：2022-06-01

Applicant: TOPPAN INC.

Inventor： Yuki Hayashi ,  Junpei Hayashi ,  Kenta Osawa ,  Takayuki Tani

IPC: B32B27/08 ,  B32B7/12 ,  B32B27/32 ,  B65D65/40 ,  B65D65/42 ,  C23C14/08 ,  C23C14/20 ,  C23C14/30

Abstract: A gas barrier film includes a substrate containing polypropylene as a main component, a gas barrier layer on a first surface of the substrate, and a coating layer on the gas barrier layer. Infrared spectroscopy of the first surface indicates a peak intensity (I1) at 1360 to 1390 cm−1 and a peak intensity (I2) at 1440 to 1480 cm−1 in a ratio satisfying the formula: (I1)/I(2)≤1.65.