Invention Grant
- Patent Title: Heat ray cutting film and method for producing same, and laminated glass and heat ray cutting member
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Application No.: US14660263Application Date: 2015-03-17
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Publication No.: US09829613B2Publication Date: 2017-11-28
- Inventor: Takao Taguchi , Shunya Katoh , Kazuhiro Oki , Masaru Yoshikawa
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-204198 20120918
- Main IPC: C09K19/00
- IPC: C09K19/00 ; G02B5/20 ; G02B5/30 ; B32B17/10

Abstract:
The present invention provides a heat ray cutting film comprising, on a substrate, at least two layers of a light reflecting layer X1 and a light reflecting layer X2 obtained by fixing cholesteric liquid crystalline phases, and an infrared ray absorbing layer comprising composite tungsten oxide microparticles, wherein the light reflecting layer X1 and the light reflecting layer X2 reflect lights circularly polarized in directions opposite to each other, reflection center wavelengths of the light reflecting layer X1 and the light reflecting layer X2 are within a range of 800 to 1100 nm and are substantially equal to each other, and total reflectivity of all light reflecting layers obtained by fixing cholesteric liquid crystalline phases is 80% or more. The heat ray cutting film of the present invention has high transparency and high heat shielding performance.
Public/Granted literature
- US20150192715A1 HEAT RAY CUTTING FILM AND METHOD FOR PRODUCING SAME, AND LAMINATED GLASS AND HEAT RAY CUTTING MEMBER Public/Granted day:2015-07-09
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