公开(公告)号：US20220234276A1

公开(公告)日：2022-07-28

申请号：US17723683

申请日：2022-04-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John P. Purcell ,  James B. Svacha ,  Stephen A. Johnson ,  Timothy J. Lindquist ,  Grant F. Tiefenbruck ,  Chad R. Wold

IPC: B29C55/16 ,  B29C35/04 ,  B29C55/00 ,  B29C55/02 ,  B29C55/14 ,  B32B7/06 ,  B32B25/08 ,  B32B25/14 ,  B32B27/08 ,  B32B27/32 ,  B32B27/36 ,  B32B38/00

Abstract: A method for making low shrink polyester films wherein the films are arranged in stacks, tentered, heat treated, and relaxed in unison. Also, polyester films produced by such method.