US 12,083,767 B2
Long film, method for producing long film, method for producing long multilayer body, and long multilayer body
Wataru Kasai, Tokyo (JP); Yuya Horiguchi, Tokyo (JP); Seigo Kotera, Tokyo (JP); and Tomoya Hosoda, Tokyo (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Dec. 27, 2021, as Appl. No. 17/562,167.
Application 17/562,167 is a continuation of application No. PCT/JP2020/026513, filed on Jul. 7, 2020.
Claims priority of application No. 2019-128118 (JP), filed on Jul. 10, 2019; application No. 2019-128119 (JP), filed on Jul. 10, 2019; and application No. 2019-195429 (JP), filed on Oct. 28, 2019.
Prior Publication US 2022/0118742 A1, Apr. 21, 2022
Int. Cl. B32B 9/00 (2006.01); B32B 15/082 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); C08J 5/18 (2006.01)
CPC B32B 15/082 (2013.01) [B32B 27/30 (2013.01); B32B 27/322 (2013.01); C08J 5/18 (2013.01); B32B 2264/0228 (2013.01); B32B 2264/0257 (2013.01); B32B 2264/202 (2020.08); B32B 2264/303 (2020.08); C08J 2327/18 (2013.01); C08J 2427/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A long film comprising at least 90 mass % of one or more thermomeltable polymers based on a total mass % of said long film, said one or more thermomeltable polymers comprising 80 to 99 mol % of a first unit based on tetrafluoroethylene, 1 to 20 mol % of a second unit based on a perfluoro (alkyl vinyl ether), and a third unit based on a monomer having a polar functional group selected from itaconic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride and maleic anhydride, wherein the long film comprises spherulites of the one or more thermomeltable polymers, and wherein a radius of each spherulite is 10 μm or less.