| 摘要 |
PROBLEM TO BE SOLVED: To provide: a heat-ray shielding laminated transparent base material having excellent penetration resistance, high visible light transmittance, a high heat-ray shielding function, a low haze value, and excellent weather resistance; a heat-ray shielding film to be used for the heat-ray shielding laminated transparent base material; and a method for producing the heat-ray shielding film.SOLUTION: The heat-ray shielding film includes a polyvinyl acetal resin containing a fine particle having the heat-ray shielding function, a plasticizer, and an anti-fading agent. In the heat-ray shielding film, the fine particle having the heat-ray shielding function is a composite tungsten oxide fine particle, which is shown by general formula MWO(wherein M is one or more kinds of elements selected from Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe, Sn, Al and Cu; 0.1≤y≤0.5; 2.2≤z≤3.0) and which has a hexagonal crystal structure. There are also provided: the method for producing the heat-ray shielding film; and the heat-ray shielding laminated transparent base material for which the heat-ray shielding film is used. |
