公开(公告)号：US20230242725A1

公开(公告)日：2023-08-03

申请号：US18297157

申请日：2023-04-07

Applicant: TOPPAN INC.

Inventor： Hiroki NAKATA

IPC: C08J7/04 ,  C08J7/052

CPC classification number: C08J7/0427 ,  C08J7/052

Abstract: A laminated film in which curl is suppressed when the film is heat-sealed with a material different from that of a substrate, the substrate is made of polyethylene terephthalate; and a sealant laminated on one side of the substrate and being to be sealed with a dissimilar material that is a material different from that of the substrate, wherein, when a laminate including a 100 mm×100 mm square of a portion of the laminated film and an 80 mm×80 mm square of the dissimilar material is placed on a flat surface so that the dissimilar material faces down, the portion of the laminated film including a portion of the substrate and a portion of the sealant, the dissimilar material being heat-sealed on a central portion of the portion of the sealant, each corner of the dissimilar material has a rise height of 20 mm or less.