Invention Grant
- Patent Title: Visibly transparent broadband infrared mirror films having fluoropolymers and 7:1:1:7:1:1 layer thickness ratio
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Application No.: US16335189Application Date: 2017-09-25
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Publication No.: US11298918B2Publication Date: 2022-04-12
- Inventor: Timothy J. Hebrink , Mark B. O'Neill , Stephen J. Kuncio , Edward J. Kivel , Laurence R. Gilbert , Tracey D. Sorensen , Timothy J. Nevitt , Stephen A. Johnson
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN St. Paul
- Agent Yufeng Dong
- International Application: PCT/US2017/053169 WO 20170925
- International Announcement: WO2018/063961 WO 20180405
- Main IPC: B32B17/06
- IPC: B32B17/06 ; G02B5/08 ; G02B5/28

Abstract:
Multilayer infrared (IR) reflecting films are provided. An optical repeating unit of the film include a plurality of optical polymeric layers arranged to reflect light by constructive and destructive interference. Optical layer A is a high refractive index polymeric layer, and optical layer B is a low refractive index isotropic polymeric layer containing fluoropolymers. The film has an average reflectance of about 50% to about 100% in a near infrared wavelength range of about 850 nm to about 1850 nm, and an average transmission of about 70% to about 90% in a visible light range.
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