PROCESS FOR PRODUCING MULTILAYER STRUCTURE

A process for multilayer structure production in which it quickly becomes possible, after restarting, to obtain a satisfactory molded object without the need of using a special purging material. In the process, which comprises feeding a saponified ethylene/vinyl acetate copolymer and other resins(s)...

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Bibliographische Detailangaben
Hauptverfasser:	INOUE, KAORU, EMOTO, YOSHIO, MIYAZUMI, SHINTA
Format:	Patent
Sprache:	eng ; fre ; jpn
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A process for multilayer structure production in which it quickly becomes possible, after restarting, to obtain a satisfactory molded object without the need of using a special purging material. In the process, which comprises feeding a saponified ethylene/vinyl acetate copolymer and other resins(s) to a melting/molding machine having a die to mold a multilayer structure, the saponified ethylene/vinyl acetate copolymer residing in the melting/molding machine is allowed to stand at a temperature lower by 0 to 100°C than the melting/molding temperature throughout the period from a melting/molding operation conducted for a certain time to the restarting of a melting/molding operation. L'invention concerne un procédé de production d'une structure multicouche permettant rapidement d'obtenir, après la remise en service, un objet moulé satisfaisant sans qu'il soit nécessaire d'utiliser une matière de purge spéciale. Selon ce procédé, qui consiste à acheminer un copolymère éthylène/acétate de vinyle saponifié et une ou plusieurs autres résines dans une machine de fusion/moulage équipée d'un moule pour mouler une structure multicouche, le copolymère éthylène/acétate de vinyle saponifié se trouvant dans la machine de fusion/moulage peut rester à une température inférieure de 0 à 100 DEG C à la température de fusion/moulage pendant la période séparant une opération de fusion/moulage s'étendant sur une certaine durée et la reprise d'une opération de fusion/moulage.