FIREPROOF PROTECTIVE PLATE GLASS WITH ANTIREFLECTION FILM, FIREPROOF PROTECTIVE LAMINATED GLASS WITH THE ANTIREFLECTION FILM, AND SPECIFIC FIRE PREVENTION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a fireproof protective plate glass with an antireflection film and a fireproof protective laminated glass with the antireflection film which produce no distortion in a transmitting image, and to provide a specific fire prevention apparatus using one of them.

SOLUTION: The fireproof protective plate glass 10 with the antireflection film is constituted by forming the antireflection film 12 on the light transmission surface 11a (11b) of a heat resistant plate glass 11 made of crystallized glass having a mean coefficient of linear expansion of -10 to 10×10-7/K in a temperature range of 30 to 750°C and the Ra value of surface roughness is 0.03 μm or less and visible light reflectance specified by JIS R3106 is 0.4% or less. Further in the fireproof protective laminated glass with the antireflection film, at least one piece among two or more pieces of plate glass is the fireproof protective plate glass 10. Further in the specific fire prevention apparatus, the fireproof protective plate glass 10 is swallowed by 6.5 mm or more in the groove of a frame body where thickness of all flame shielding effective parts is 1.6 mm or more and a space between the groove of the frame body and the fireproof protective plate glass 10 is sealed with a heat resistant material.

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