| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat control sheet which has a high degree of freedom of color tone, has no adverse influence on a surrounding landscape, transmits heat rays in the winter season, and shields the heat rays in the summer season.SOLUTION: A heat control sheet is a flexible sheet which includes a near infrared rays variable scattering layer, in which the near infrared rays variable scattering layer is constituted of a transparent matrix resin composed of a soft polyvinyl chloride resin composition, transparent particles dispersed and included in the transparent matrix resin and having an average particle diameter of 1-20 μm, and a near infrared permeable colorant, and in which the transparent particle is at least one selected from a crosslinked acrylic particle, a crosslinked polystyrene particle, a crosslinked acrylic-polystyrene copolymer particle, and a glass particle, and a difference between a refractive index of the transparent matrix resin and that of the transparent particle is 0.01 or less at a flexible sheet temperature of 0-10°C and is 0.03 or more and 0.06 or less at a flexible sheet temperature of 60-70°C. |
