FILM ROLL LAYER BODY

• Main Authors: TOGAWA HITOMI, KATSUHARA KAZUNARI, NEMOTO TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 05.07.2018
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a film roll layer body high in polarization permeability and good also in polarization reflection characteristics, and capable of being adhered by a linear polarization film and a roll-to-roll in order to cope with a large size of the screen and capable of increasing productivity.MEANS FOR SOLVING THE PROBLEM: A film roll layer body comprises an alternate multilayer uniaxial stretched film having a multilayer structure alternately laminated with a first layer and a second layer. The first layer is a layer comprising a polyester resin (A) and the second layer is a layer comprising a polyester resin (B). A refraction factor in an uniaxial stretched direction and a direction (Y direction) orthogonal to X direction in a film plane is within a specific range. The maximum polarization reflectivity of the wavelength 400 to 800 nm is 20% or more with respect to a polarization component in parallel with an incident plane including the Y direction with the film plane as the reflection plane, and an average transitivity of the wavelength 400 to 800 nm is 80% or more with respect to the polarization component in parallel with the incident plane including the X direction within the film plane.SELECTED DRAWING: None 【課題】偏光透過性が高く、偏光反射特性にも優れ、かつ、画面の大型化に対応するために直線偏光フィルムとｒｏｌｌ−ｔｏ−ｒｏｌｌでの貼り合せが可能で生産性を高めることができるフィルム巻層体の提供。【解決方法】第１層と第２層とが交互に積層された多層構造を有する交互多層一軸延伸フィルムからなるフィルム巻層体であって、第１層は、ポリエステル系樹脂（Ａ）からなる層であり、第２層は、ポリスチレン系樹脂（Ｂ）からなる層であり、一軸延伸方向（Ｘ方向）、及び、フィルム面内でＸ方向と直交する方向（Ｙ方向）の屈折率が特定の範囲であり、フィルム面を反射面としてＹ方向を含む入射面に対して平行な偏光成分について波長４００〜８００ｎｍの最大偏光反射率が２０％以上であり、フィルム面内でＸ方向を含む入射面に対して平行な偏光成分について波長４００〜８００ｎｍの平均透過率が８０％以上であるフィルム巻層体。【選択図】なし