Optical laminate film, infrared shielding film and infrared shielding body

A method of manufacturing an optical laminate film, comprising the steps of:

• applying, onto a substrate, a coating liquid for low refractive index layer comprising metal oxide particles, a silanol modified polyvinyl alcohol, a binder resin and an aqueous solvent, wherein the binder resin contained in the coating liquid for the low refractive index layer comprises an unmodified polyvinyl alcohol having a polymerization degree of 1500 to 5000, and a coating liquid for high refractive index layer comprising a binder resin and an aqueous solvent;
• and
• drying the substrate coated with the coating liquids.

An optical laminate film comprising, on a substrate, at least one unit constituted of a high refractive index layer comprising a first silanol modified polyvinyl alcohol, and a low refractive index layer comprising metal oxide particles and a second silanol modified polyvinyl alcohol.

A method of manufacturing an optical laminate film, comprising the steps of:

• applying, onto a substrate, a coating liquid for a high refractive index layer comprising a first silanol modified polyvinyl alcohol, a binder resin and an aqueous solvent, and a coating liquid for a low refractive index layer comprising metal oxide particles, a second silanol modified polyvinyl alcohol, a binder resin and an aqueous solvent;
• and
• drying the substrate coated with the coating liquids.