公开(公告)号：US12083767B2

公开(公告)日：2024-09-10

申请号：US17562167

申请日：2021-12-27

Applicant: AGC Inc.

Inventor： Wataru Kasai ,  Yuya Horiguchi ,  Seigo Kotera ,  Tomoya Hosoda

IPC: B32B9/00 ,  B32B15/082 ,  B32B27/30 ,  B32B27/32 ,  C08J5/18

CPC classification number: B32B15/082 ,  B32B27/30 ,  B32B27/322 ,  C08J5/18 ,  B32B2264/0228 ,  B32B2264/0257 ,  B32B2264/202 ,  B32B2264/303 ,  C08J2327/18 ,  C08J2427/12

Abstract: As an exemplary configuration, a long film is configured by thermomeltable polymers including a first unit based on tetrafluoroethylene and a second unit based on perfluoro (alkyl vinyl ether), including spherulites of the thermomeltable polymers, wherein radius of each spherulite is 10 μm or less. As another exemplary configuration, a long film is configured by tetrafluoroethylene polymers having a melt flow rate within a range of 5 to 40 g/10 min. The long film is heated at 180° C. for 30 minutes so as to measure the thermal expansion rate, and when letting thermal expansion rate in a first direction, which extends at a 45-degree angle to a melt flow direction be A, and thermal expansion rate in a second direction orthogonal to the first direction be B, A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.