Aromatic Polyimide Film and Process for the Production Thereof

Disclosed is an aromatic polyimide film having specific elastic modulus and thermal expansion coefficient. Also disclosed is a method for producing such an aromatic polyimide film. Specifically disclosed is an aromatic polyimide film which is composed of an aromatic polyimide containing not less tha...

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Bibliographische Detailangaben
Hauptverfasser:	ISHIWATA TOYOAKI, KIDO NOBUAKI, MATSUO JYUHOU
Format:	Patent
Sprache:	eng
Schlagworte:	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 PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Disclosed is an aromatic polyimide film having specific elastic modulus and thermal expansion coefficient. Also disclosed is a method for producing such an aromatic polyimide film. Specifically disclosed is an aromatic polyimide film which is composed of an aromatic polyimide containing not less than 70 mol % of repeating units represented by the following formula (I): (I) while satisfying the following relations (1) and (2): CTEMD −11×MiMD+70 (1) CTETD −11×MiTD+70 (2) wherein CTEMD represents the in-plane thermal expansion coefficient (ppm·K−1) in the machine direction; CTETD represents the in-plane thermal expansion coefficient (ppm·K−1) in the transverse direction; MiMD represents the elastic modulus (GPa) in the machine direction; and MiTD represents the elastic modulus (GPa) in the transverse direction. Also specifically disclosed is a method for producing such an aromatic polyimide film.