Patent ID: 9470827
Filing Date: 2016-10-18
CPC Classification: B05D,B32B,G02B

Claim Text:
1. A near-infrared reflective film comprising a lamination unit comprising: a high refractive layer containing a first metal oxide particle and a first water-soluble polymer, a low refractive layer containing a second metal oxide particle and a second water-soluble polymer, and a mixed layer located between the high refractive layer and the low refractive layer and which contains the first metal oxide particle, the second metal oxide particle and a third water-soluble polymer, wherein the low refractive layer has a refractive index that is smaller than a refractive index of the high refractive layer by 0.1 or more, the first metal oxide particle and the second metal oxide particle have different metal oxides, wherein, in the mixed layer, a ratio of the first metal oxide particle and the second metal oxide particle varies in steps or continuously varies, wherein each of the first metal oxide particle and the second metal oxide particle has a particle size of 4 nm to 100 nm, and wherein the mixed layer has a thickness that is 10 to 30% of a film thickness of a region of one of a high refractive layer or a low refractive layer, the one of a high refractive layer or a low refractive layer being adjacent to the mixed layer, the one of a high refractive layer or a low refractive layer having a maximum content of the metal oxide particle, and the region being defined as containing 75% or more of the maximum content of the metal oxide particle in the one of a high refractive layer or a low refractive layer.