TWO-AXIALLY ORIENTED POLYESTER FILM AND MAGNETIC RECORDING MEDIUM

• Main Authors: NAKAMORI YUKARI, HIGASHIOJI TAKUJI, HORIE MASAHITO
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

PROBLEM TO BE SOLVED: To stably provide a two-axially oriented polyester film excellent in runnability and taking-up properties and further excellent in dimensional stability, in which, when being into a magnetic recording medium, having a smooth magnetic layer and reduced in the environmental changes of temperature and humidity and a dimensional change caused by preservation, and having a reduced error rate.SOLUTION: Provided is a two-axially oriented polyester film satisfying the following relation about protrusion density when a slice level is set at the intervals of 10 nm from a standard face in the roughness curve at least of one side:0.4≤(M60/M10)×100≤3M100≤5.SELECTED DRAWING: None 【課題】走行性や巻き取り性に優れ、さらには寸法安定性に優れた二軸配向ポリエステルフィルムであって、磁気記録媒体とした際に平滑な磁性層を有すると共に温度や湿度の環境変化や保存による寸法変化が小さい、エラーレートの少ない高密度磁気記録媒体となる二軸配向ポリエステルフィルムを安定に提供する。【解決手段】少なくとも片面の粗さ曲線において、基準面から１０ｎｍ間隔にスライスレベルを設定した時の突起密度について以下の関係を満足する二軸配向ポリエステルフィルム。０．４≦（Ｍ60/Ｍ10）×100≦３Ｍ100≦５【選択図】なし