Heat ray shielding sheet material and liquid additive for use in producing the same

摘要

An object of the present invention is to provide a heat wave shielding material which can be manufactured by a simple method without using a complicated manufacturing method or a high cost physical film-formation method, maintains excellent visible light transmittancy, exhibits high heat wave shieldability, and, furthermore, is excellent in strength such as impact resistance. The heat wave shielding resin sheet which has a maximum transmittance in the visible light region and at the same time a minimum transmittance in the near-infrared region exhibiting strong absorption is realized by dispersing hexaboride fine particles such as LaB6 as a heat wave shielding component in polycarbonate resin or acrylic resin. ITO fine particles and/or ATO fine particles can be dispersed together with the hexaboride fine particles.

主权项

1. A heat wave shield consisting of a molded single-layered transparent sheet consisting of a resin of polycarbonate resin or acrylic resin, hexaboride fine particles having an average particle diameter of 200 nm or less, and a dispersing agent,
wherein hexaboride of the hexaboride fine particles is LaB6; the hexaboride fine particles are present in the molded single-layered transparent sheet in an amount from 0.05 g/m2 to 0.18 g/m2 and from 0.0049 wt % to 0.0050 wt %; and the molded single-layered transparent sheet has a solar radiation transmittance of 59.7% to 59.8% when the thickness of the molded single-layered transparent sheet is 3 mm and a visible light transmittance thereof is 78%; and
the molded single-layered transparent sheet has a maximum transmittance value in a wavelength region between 400 nm and 700 nm, and a minimum transmittance value in a vicinity of 1000 nm, a transmittance value gradually increases in a longer wavelength side than the minimum transmittance value, and a difference between the maximum transmittance value and the minimum transmittance value is 15 or more.