LAMINATE FILM AND METHOD FOR PRODUCING THE SAME

• Main Authors: OGATA MASAMI, SATO KOHEI, TAKADA HAGUMU
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2016
• 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 laminate film that is excellent in slipperiness, abrasion resistance, transparency, suppression of interference spots (visibility) upon laminating a hard coat layer having a high refractive index and adhesion to the hard coat layer having a high refractive index.SOLUTION: The laminate film has a resin layer on at least one side of a polyester film. The resin layer contains (A) a particle including a metal oxide and (B) a particle including an inorganic compound. The ratio of a number average particle size of the particle (A) and the particle (B) (the number average particle size (φA) of the particle (A)/the number average particle size (φB) of the particle (B)) is not less than 0.05 to not more than 0.9; the ratio of a thickness of the resin layer and a number average particle size of the particle (B) (the thickness of the resin layer/the number average particle size (φB) of the particle (B)) is not less than 0.2 to not more than 0.9; and the remainder of subtraction of a thickness of the resin layer from a number average particle size of the particle (B) (the number average particle size (φB)(nm) of the particle (B)-the thickness (nm) of the resin laye) is not more than 100 nm.SELECTED DRAWING: None 【課題】易滑性、耐摩耗性、透明性、高屈折率ハードコート層を積層した際の干渉斑の抑制（視認性）、高屈折率ハードコート層との接着性に優れる積層フィルムを提供すること。【解決手段】ポリエステルフィルムの少なくとも片側に樹脂層を有する積層フィルムであって、該樹脂層が金属酸化物を含む粒子（Ａ）と無機化合物を含む粒子（Ｂ）とを含有し、粒子（Ａ）と粒子（Ｂ）の数平均粒子径の比（粒子（Ａ）の数平均粒子径（φＡ）／粒子（Ｂ）の数平均粒子径（φＢ））が０．０５以上０．９以下であり、樹脂層の厚みと粒子（Ｂ）の数平均粒子径の比（樹脂層厚み／粒子（Ｂ）の数平均粒子径（φＢ））が０．２以上０．９以下であり、粒子（Ｂ）の数平均粒子径と樹脂層の厚みの差（粒子（Ｂ）の数平均粒子径（φＢ）（ｎｍ）−樹脂層の厚み（ｎｍ））が１００ｎｍ以下である積層フィルム。【選択図】なし