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公开(公告)号：US20210095111A1
公开(公告)日：2021-04-01
申请号：US17044041
申请日：2019-04-19
Applicant: KURARAY CO., LTD.
Inventor： Hiroyuki ARISHIMA , Koichiro ISOUE , Hirotaka YASUDA , Toshiyuki IGUCHI
IPC: C08L31/04 , C08K5/00 , B32B17/10 , B32B15/082 , B32B37/14
Abstract: A polyvinyl acetal resin film, having an average surface roughness Rz of at least one surface of 3.0 μm or less; a birefringence Δn of 3.0×10−4 or less; and an average thickness of 200 μm or less.
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