| abstract |
[PROBLEMS] To adapt to a transparent polymer material for optics that is required with the progress of flat displays such as liquid crystal display devices, plasma displays, infrared sensors, optical waveguides, etc., and has high heat resistance and transparency, and is flexible. A highly transparent acrylic film or sheet is provided. Acrylic that has a glass transition temperature of 120 ° C. or higher, an unstretched film or sheet having a thickness of 20 μm or higher, and does not crack even when bent 180 ° in an atmosphere of 25 ° C. and 65% RH. System transparent film or sheet. [Selection figure] None |