LAMINATED FILM

• Main Authors: OHASHI JUNPEI, ISHIDA YASUYUKI, MIWA NORIFUMI
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a laminated film having excellent abrasion resistance, in particular, excellent resistance to repeated abrasion while being a thin film.SOLUTION: There is provided a laminated film having a surface layer 8 on at least one side of a support substrate 10, which satisfies the following conditions. The condition 1: the surface layer 8 has an indentation elastic modulus Eof 1500 MPa or less. The condition 2: the support substrate 10 is a polyester film having a polyester A layer 8 and a polyester B layer 9 and the B layer 8 satisfies at least one of the following (A) or (B). (A) The diol component of a polyester constituting the B layer 8 contains 60 to 90 mol% of a structural unit derived from ethylene glycol and 10 to 40 mol% of a structural unit derived from the other diols. (B) The dicarboxylic acid component of a polyester constituting the B layer 8 contains 60 to 90 mol% of a structural unit derived from terephthalic acid and 10 to 40 mol% of a structural unit derived from the other dicarboxylic acids.SELECTED DRAWING: Figure 3 【課題】薄膜でありながら、耐擦傷性、特に反復擦過耐性に優れた積層フィルムの提供。【解決手段】支持基材１０の少なくとも一方に、表面層８を有する積層フィルムであって、以下の条件１および条件２を満たす、積層フィルム。条件１：表面層８の押込み弾性率ＥＩＴが１，５００ＭＰａ以下。条件２：支持基材１０がポリエステルＡ層８とポリエステルＢ層９を有するポリエステルフィルムであって、Ｂ層８が下記（Ａ）または（Ｂ）の少なくとも一方を満たす。（Ａ）Ｂ層８を構成するポリエステルのジオール成分について、エチレングリコール由来の構造単位を６０〜９０モル％、その他のジオール由来の構造単位を１０〜４０モル％含有してなる。（Ｂ）Ｂ層８を構成するポリエステルのジカルボン酸成分について、テレフタル酸由来の構造単位を６０〜９０モル％、その他のジカルボン酸由来の構造単位を１０〜４０モル％含有してなる。【選択図】図３