Near-infrared reflective film, method for manufacturing near-infrared reflective film, and near-infrared reflector

摘要

The present invention provides a near-infrared reflective film and a near-infrared reflector, which can be used over large areas and are flexible, and have low haze and high visible light transmittance. The near-infrared reflective film comprises at least one unit composed of a high refractive index layer and low refractive index layer on a substrate, and is characterized in that the refractive index difference between an adjacent high refractive index layer and low refractive index layer is at least 0.1, and said high refractive index layer contains at least one type of compound (A) selected from: 1) a rutile-type titanium oxide having a volume-average particle diameter of not more than 100 nm; 2) a water-soluble polymer; and 3) the following group of compounds. Group of compounds: a carboxyl group-containing compound, hydroxamic acids, pyridine derivatives.

主权项

1. A near-infrared reflective film, comprising:
a substrate; a unit constituted by a high refractive index layer and a low refractive index layer on the substrate; wherein the near-infrared reflective film has a refractive index difference of 0.1 or more between the high refractive index layer and the low refractive index layer both neighboring on each other, wherein the high refractive index layer contains 1) a rutile titanium dioxide with a volume average particle size of 100 nm or less, 2) a water soluble polymer, and 3) at least one kind of compounds A selected from the group consisting of a carboxyl group-containing compound, hydroxamic acids, and a pyridine derivative, wherein the water soluble polymer comprises at least one of a gelatin, a combination of a thickening polysaccharide and a water soluble polymer with a reactive functional group, a combination of a thickening polysaccharide and a gelatin, or a combination of a water soluble polymer with a reactive functional group and a gelatin, and wherein the combination of a thickening polysaccharide and a water soluble polymer with a reactive functional group, or the combination of a thickening polysaccharide and gelatin comprises the thickening polysaccharide 3 weight % or more to the total weight of the high refraction index layer.