Near-infrared reflecting film and near-infrared reflecting body provided with same
AssigneeKonica Minolta Holdings, Inc.
InventorsNoriyuki Kokeguchi, Takeo Arai
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Abstract
The present invention provides a highly flexible near-infrared reflecting film which has achieved good near-infrared reflection characteristics by comprising layers that have different refractive indexes and which is not susceptible to bending or cracks. This near-infrared reflecting film has a multilayer film, in which films having refractive indexes different from each other are laminated, on a film, and is characterized in that: the difference of the refractive indexes between at least two adjacent layers is 0.3 or more; at least one of the two adjacent layers contains a metal oxide; and at least one of the two adjacent layers contains a polyvinyl alcohol or an inorganic polymer.
Claims14
A near-infrared reflective film, comprising:
- a substrate;
- and
- multiple layers which are laminated on the substrate and are different in refractive index from each other, wherein a refractive index difference between at least two neighboring layers in the multiple layers is 0.3 or more, both, of the two neighboring layers contain a metal oxide and a polyvinyl alcohol or an inorganic polymer, and wherein the metal oxide contained in a layer with a low refractive index of the two neighboring layers is a silicon dioxide.
An optical film, comprising:
- a substrate;
- and
- multiple layers which are laminated on the substrate and are different in refractive index from each other, wherein a refractive index difference between at least two neighboring layers in the multiple layers is 0.3 or more, both of the two neighboring layers contain a metal oxide and a polyvinyl alcohol or an inorganic polymer, and wherein the metal oxide contained in a layer with a low refractive index of the two neighboring layers is a silicon dioxide.
Dependencies are inferred from the claim text.