MULTILAYER STRETCHED FILM

PROBLEM TO BE SOLVED: To provide a multilayer stretched film which hardly causes a curling phenomenon in spite of the asymmetric lyer structure, can perform processing of printing, laminating and bag making in addition to pillow packaging and can be used as a packaging film for wide fields such as a...

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Bibliographische Detailangaben
Hauptverfasser:	NISHINA YUTAKA, HIDAKA AKINOBU, MATSUURA AKIRA, HIROSE DAISUKE, MITANI MASANORI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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 PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a multilayer stretched film which hardly causes a curling phenomenon in spite of the asymmetric lyer structure, can perform processing of printing, laminating and bag making in addition to pillow packaging and can be used as a packaging film for wide fields such as a medical and industrial packaging field including a food packaging field.SOLUTION: There is provided a multilayer stretched film formed by laminating a polypropylene resin (A) layer, an adhesive resin (B) layer, a gas barrier resin (C) layer, an adhesive resin (B) layer and a heat-sealing resin (D) layer in order. The polypropylene resin (A) layer is composed of a polyester resin composed mainly of a repeating unit of butylene terephthalate, the gass barrier resin (C) is composed of an aliphatic polyamide resin or an ethylene-vinyl alcohol-based copolymer resin, and in which the difference in melting point between the polyester resin and the heat-sealing resin is 80 to 170°C and the stretching ratio both in MD and TD is 1.5 times or more.