Multilayer heat-shrinkable polystyrene film and heat-shrinkable labels and containers made by using the same

A heat-shrinkable polystyrene film which is excellent in shrink finish, low-temperature shrinkability, and solvent resistance and which has a low shrinkage stress and is lowered in natural shrinkage, lowering in elongation by printing, and solvent shrinkage. The heat-shrinkable polystyrene film is a...

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Bibliographische Detailangaben
1. Verfasser:	TANAKA YUKIHIRO,HIRUMA TAKASHI,KOBAYASHI SHUJI,HAYASHI TATSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR ADVERTISING 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 CRYPTOGRAPHY DISPLAY DISPLAYING EDUCATION HANDLING THIN OR FILAMENTARY MATERIAL LABELS OR NAME-PLATES 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 PHYSICS SEALS SIGNS STORING TRANSPORTING
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Beschreibung
Zusammenfassung:	A heat-shrinkable polystyrene film which is excellent in shrink finish, low-temperature shrinkability, and solvent resistance and which has a low shrinkage stress and is lowered in natural shrinkage, lowering in elongation by printing, and solvent shrinkage. The heat-shrinkable polystyrene film is a multilayer laminated film which is constituted of at least three layers, i.e., two outer films made of a prescribed styrene/butadiene block copolymer and an inner layer made of a mixture comprising a prescribed styrene/butadiene block copolymer and a prescribed styrene/butadiene block copolymer and/or a styrene/butadiene/isoprene block copolymer and which is stretched at least uniaxially and has a thickness ratio of the inner layer to the laminated film of 60 to 85 % and a maximum shrinkage stress of 2.5MPa or below in the direction of the main shrinkage at 90 DEG C.