LAMINATED POLYESTER FILM

• Main Authors: UTO TAKAYUKI, MASUDA YOSHITAKE, SAWAMOTO KEIKO
• Format: Patent
• Language: English; Japanese
• Published: 01.09.2023
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL PROCESSES OF COMPOUNDING; INKS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING-UP

To provide a laminated polyester film with high adhesion to an encapsulant such as a solar cell regardless of the temperature used.SOLUTION: The present invention relates to a laminated polyester film having an easily adhered layer on at least one side, which has at least one of the following features 1 and 2 when the AFM elastic modulus of the easily adhered layer at temperature of T°C is P(T), P(-20)-P(25) is ΔP, and P(-20)/P(25) is an elastic modulus ratio P'. Feature 1: The ΔP is 0.1 GPa or more and 2.0 GPa or less. Feature 2: The elastic modulus ratio P'is 0.1 or more and 2.3 or less.SELECTED DRAWING: None 【課題】本発明は、使用する温度によらずに太陽電池セルなどの封止剤との高い接着性を有する積層ポリエステルフィルムを提供することをその課題とする。【解決手段】少なくとも一方の面に易接着層を有する積層ポリエステルフィルムであって、前記易接着層の温度Ｔ℃でのＡＦＭ弾性率をＰ（Ｔ）、Ｐ（－２０）－Ｐ（２５）をΔＰ、Ｐ（－２０）／Ｐ（２５）を弾性率比Ｐ'としたときに、以下の特徴１と２の少なくとも一方を備える、 積層ポリエステルフィルム。特徴１：前記ΔＰが０．１ＧＰａ以上２．０ＧＰａ以下である。特徴２：前記弾性率比Ｐ'が０．１以上２．３以下である。【選択図】なし