LIGHT-REFLECTING FILM, AND LIGHT-REFLECTING BODY AND LIGHT-REFLECTING DEVICE USING THE SAME

• Main Author: HONDA MIKA
• Format: Patent
• Language: English; Japanese
• Published: 19.01.2015
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a light-reflecting film which exhibits superior reflection efficiency of sunlight and light resistance against sunlight and is reduced in curling.SOLUTION: A light-reflecting film of the present invention includes an ultraviolet ray-reflecting portion (1) and a visible/infrared ray-reflecting portion (2) in order along a light incident direction. The ultraviolet ray-reflecting portion (1) has at least one unit comprising a low refractive index layer (a) and a high refractive index layer (b) laminated on each other, and the visible/infrared ray-reflecting portion (2) has at least one unit comprising a low refractive index layer (c) and a high refractive index layer (d) laminated on each other. At least either of the low refractive index layer (a) and the high refractive index layer (b) constituting the ultraviolet ray-reflecting portion (1) contains a resin soluble in at least either of water and water-compatible solvent, and the visible/infrared ray-reflecting portion (2) is formed by heating and stretching after the low refractive index layer (c) and the high refractive index layer (d) are laminated. 【課題】太陽光の反射効率および耐光性に優れ、かつカールが低減された光反射フィルムを提供する【解決手段】本発明の光反射フィルムは、光が入射する方向から順に、紫外線反射部（１）と、可視光線・赤外線反射部（２）とを有する。紫外線反射部（１）は、低屈折率層（ａ）および高屈折率層（ｂ）が積層されたユニットを少なくとも１つ有し、可視光線・赤外線反射部（２）は、低屈折率層（ｃ）および高屈折率層（ｄ）が積層されたユニットを少なくとも１つ有する。そして、紫外線反射部（１）を構成する低屈折率層（ａ）または高屈折率層（ｂ）の少なくとも１層は、水または水と相溶性を有する溶剤の少なくとも一方に可溶な樹脂を含み、かつ、可視光線・赤外線反射部（２）は、低屈折率層（ｃ）および高屈折率層（ｄ）を積層した後、加熱延伸することにより形成されてなることを特徴とする。【選択図】図１