STRETCHED FILM, ROLL BODY CONSISTING OF THE SAME, LIQUID CRYSTAL DISPLAY DEVICE, LUMINAIRE AND ARTICLE FOR DECORATION HAVING THE SAME, AND MANUFACTURING METHOD OF STRETCHED FILM

To provide a reflection film whose delamination is prevented, and which has excellent handleability and high reflection property in a secondary processing process for making a film as a chip roll for a backlight unit or the like, and taking the chipped film from a protective film or a detachment fil...

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Bibliographische Detailangaben
Hauptverfasser: TERAKAWA TORU, YAMASHITA SHO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a reflection film whose delamination is prevented, and which has excellent handleability and high reflection property in a secondary processing process for making a film as a chip roll for a backlight unit or the like, and taking the chipped film from a protective film or a detachment film laminated on double sides of the chipped film.SOLUTION: There is proposed a stretched film having a layer Y consisting of at least 2 kind of resins of a polyester resin (A) and a thermoplastic resin (B) different from the polyester resin (A), and a layer X containing a polyester resin (C) different from the polyester resin (A) and a filler, satisfying the following (Formula 1), and having film porosity of 35% or more and detachment strength of the layer X and the layer Y of 35 N/m or more. (Formula 1) film thickness (μm)×film porosity (%)/average transmittance (%)≥1650.SELECTED DRAWING: None 【課題】バックライトユニット等向けにフィルムをチップロール化し、チップ化されたフィルムの両面に貼られた保護フィルムや離形フィルムからチップ化したフィルムを取り出す二次加工工程等において、反射フィルムの層間剥離を防止し、優れたハンドリング性と高い反射特性を有する反射フィルムを提供せんとする。【解決手段】ポリエステル樹脂(A)及び前記ポリエステル樹脂(A)とは異なる熱可塑性樹脂(B)の少なくとも2種の樹脂からなる層Yと、前記ポリエステル樹脂(A)とは異なるポリエステル樹脂(C)と充填材とを含有する層Xを備え、下記(式1)を満たし、フィルム空隙率が35%以上であり、かつ、前記層Xと前記層Yとの剥離強度が35N/m以上であることを特徴とする延伸フィルムを提案する。(式1)・・フィルム厚み(μm)×フィルム空隙率(%)/平均透過率(%)≧1650【選択図】なし