Solar radiation shielding laminated structure and method for producing the same

A solar radiation shielding laminated structure

• in which an interlayer is sandwiched between one laminated sheet and other laminated sheet;
• the interlayer having one or more kinds of intermediate films selected from a resin sheet containing solar radiation shielding fine particles and a resin film containing solar radiation shielding fine particles and one or more kinds of intermediate films selected from a resin sheet not containing solar radiation shielding fine particles and a resin film not containing solar radiation shielding fine particles,
• the one laminated sheet being selected from a sheet-glass not containing solar radiation shielding fine particles, a resin board not containing solar radiation shielding fine particles, and a resin board containing solar radiation shielding fine particles,
• the other laminated sheet containing solar radiation shielding fine particles;
• wherein the solar radiation shielding fine particles are solar radiation shielding fine particles containing calcium lanthanum boride fine particles represented by general formula CaxLa1-xBm, a value of x is in a range of 0.001≤x≤0.800, and a value of m is in a range of 5.0≤m<6.3 in the general formula,
• an average dispersed particle size of the calcium lanthanum boride fine particles is 1 nm or more and 800 nm or less, and
• a fine particle shape of the calcium lanthanum boride fine particles is at least one shape selected from the following 1) and 2):
• 1) a shape in which a scattering intensity of the calcium lanthanum boride fine particles diluted and dispersed in a solvent measured using a small-angle X-ray scattering method is such that a slope value Ve of a straight line obtained by double-logarithmic plotting of a relationship between scattering vector q=4π sin θ/λ and scattering intensity I(q) is in a range of −3.8≤Ve≤−1.5;
• 2) a flat cylindrical (wherein a diameter of a bottom circle is d and a height of a cylinder is h) shape, or a spheroidal (wherein a length of a long axis is d and a length of a short axis is h) shape, with a value of aspect ratio d/h being in a range of 1.5≤d/h≤20.

A method for producing a solar radiation shielding laminated structure

• in which an interlayer is sandwiched between two laminated sheets;
• the interlayer having, as an intermediate film, one or more kinds selected from a resin sheet containing solar radiation shielding fine particles and a resin film containing solar radiation shielding fine particles,
• the laminated sheets being selected from a sheet-glass not containing solar radiation shielding fine particles and a resin board not containing solar radiation shielding fine particles;
• wherein the solar radiation shielding fine particles are solar radiation shielding fine particles containing calcium lanthanum boride fine particles represented by general formula CaxLa1-xBm, a value of x is in a range of 0.001≤x≤0.800, and a value of m is in a range of 5.0≤m<6.3 in the general formula,
• an average dispersed particle size of the calcium lanthanum boride fine particles is 1 nm or more and 800 nm or less,
• a fine particle shape of the calcium lanthanum boride fine particles is at least one shape selected from the following 1) and 2):
• 1) a shape in which a scattering intensity of the calcium lanthanum boride fine particles diluted and dispersed in a solvent measured using a small-angle X-ray scattering method is such that a slope value Ve of a straight line obtained by double-logarithmic plotting of a relationship between scattering vector q=4π sin θ/λ and scattering intensity I(q) is in a range of −3.8≤Ve≤−1.5;
• 2) a flat cylindrical (wherein a diameter of a bottom circle is d and a height of a cylinder is h) shape, or a spheroidal (wherein a length of a long axis is d and a length of a short axis is h) shape, with a value of aspect ratio d/h being in a range of 1.5≤d/h ≤20.