| abstract |
By laminating a plurality of protective films of this embodiment to form a film, a test piece with a width of 4mm and a thickness of 200μm±20μm is produced, and the above-mentioned test piece is maintained, and under the measurement conditions of a stretching mode with a frequency of 11 Hz and a heating rate of 3°C/min , measured storage elastic modulus of the test piece, the temperature of the test piece to the aforementioned storage elastic modulus at 70 deg.] C to E '70, the protective film forming film for the wavelength maximum of 380nm to 780nm light reflectance of the When R max is set, the Y value calculated by the formula: Y=(log 10 E'70 ) 2 ×R max is more than 260, and the X calculated by the formula: X=(log 10 E'70 ) 2 The value is 33 or more. |