| 摘要 |
PURPOSE:To produce a laminated safety glass having high glare-shielding property and effective in preventing rise of room temperature, at a low cost, by using fine glass powder containing a photochromic substance and having nearly equal refractive index to a transparent synthetic resin interlayer of a laminated safety glass and dispersing the powder in the interlayer. CONSTITUTION:A laminated safety glass 1 is composed of a transparent interlayer 2 having a thickness of about <=1mm and a pair of transparent glass plates 3 having a thickness of about 1.5-2mm and bonded to both faces of the interlayer 2. The interlayer 2 is a polyvinyl butyral synthetic resin film dispersed with photochromic glass particles having nearly equal refractive index to the synthetic resin. The photochromic glass is preferably a glass containing a proper amount of AgCl and the particle diameter of the glass is preferably smaller than the wavelength of visible light (about 300-800nm). The dispersed photochromic glass powder decreases the light transmission of the safety glass according to the intensity of sunlight.
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