公开(公告)号：US11535437B2

公开(公告)日：2022-12-27

申请号：US16144399

申请日：2018-09-27

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Ryoji Ishii ,  Takeshi Nishikawa ,  Tadashi Hongo

IPC: B65D65/40 ,  B32B27/36 ,  B32B9/00 ,  C08J7/04 ,  C08J7/043 ,  C08J7/048 ,  B05D7/04 ,  C08L83/02 ,  C09D183/02 ,  C09D129/04 ,  C08L29/04

Abstract: A gas barrier film that includes at least a film base material including a polyester resin having a butylene terephthalate unit as a main constituent unit, and one or more metal oxide layers wherein the gas barrier film has a heat shrinkage rate in the machine direction (MD direction) after heating for 30 minutes at 150° C. of 0.6% or more but less than 3.0%, the heat shrinkage rate being represented by the following formula: Heat shrinkage rate={(Length before heating−Length after heating)/Length before heating}×100(%).