METHOD AND APPARATUS FOR MAKING FILM

PROBLEM TO BE SOLVED: To enable good surface properties and flatness at a high speed by making a solvent having compatibility with an organic polymer exist between a support and an organic polymer solution film to be cast. SOLUTION: An organic polymer solution is extruded by a T-die 1, and it is sup...

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Bibliographische Detailangaben
Hauptverfasser:	YASHIRO TOSHIYA, TSUKUDA AKIMITSU, CHIKUGI TOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To enable good surface properties and flatness at a high speed by making a solvent having compatibility with an organic polymer exist between a support and an organic polymer solution film to be cast. SOLUTION: An organic polymer solution is extruded by a T-die 1, and it is supported by a cast drum 7. A solvent having compatibility with the organic polymer is made to exist between an organic polymer solution film 5 extruded from the T-die 1 and the drum 7 by a solvent adding device B, which is installed upstream from the T-die 1 and made movable by a press mechanism 3 to enable its position to be adjusted. The solvent is added onto a support by the contact with the drum 7. The solvent having compatibility forms the solution of the polymer of at least 1 wt.% at an ordinary temperature. In this way, even in the case of a thin film, good surface properties and flatness can be made possible at a high speed.