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公开(公告)号:US20200217989A1
公开(公告)日:2020-07-09
申请号:US16823158
申请日:2020-03-18
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor: Chad R. Wold , Yufeng Liu , Timothy J. Hebrink , Stephen A. Johnosn , Diane North , Laurent Froissard , Edward J. Kivel
IPC: G02B1/10 , B42D25/445 , B42D25/36 , B29C48/08 , B29C48/00 , B29C48/21 , B29C48/18 , B32B27/08 , B32B27/36 , B32B27/30 , B42D25/00 , B32B7/12 , B42D25/23 , B42D25/29 , B42D25/351 , B42D25/425 , B42D25/455 , B29C35/02 , B29C55/00 , B29C55/12 , B29D11/00 , G02B1/04 , G02B5/02 , G02B5/08 , G02B5/30
Abstract: A multilayer optical film includes alternating layers of first and second optical layers; the first optical layer comprising a first polyester, wherein the first polyester comprises first dicarboxylate monomers and first diol monomers, and from about 0.25 to less than 10 mol % of the first dicarboxylate monomers have pendant ionic groups; the second optical layer comprising a second polyester; and wherein the first and second optical layers have refractive indices along at least one axis that differ by at least 0.04. The multilayer optical film may be a polarizer film, a reflective polarizer film, a diffuse blend reflective polarizer film, a diffuser film, a brightness enhancing film, a turning film, a mirror film, or a combination thereof. The multilayer optical film may also be a transaction card such as a financial transaction card, an identification card, a key card, or a ticket card. A method of making the multilayer film is also disclosed.