PACKAGING FILM FOR PHOTOSENSITIVE MATERIAL

PURPOSE: To provide a packaging film for photosensitive material which is not only excellent in light shielding property, tearing strength, and impact resisting strength, but also enhanced in low temperature heat sealing property and excellent in slip characteristic and blocking resistance character...

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Bibliographische Detailangaben
Hauptverfasser:	NAGAOKA HARUKI, NISHINO KAZUNARI
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY PROCESSES IN PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS
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Beschreibung
Zusammenfassung:	PURPOSE: To provide a packaging film for photosensitive material which is not only excellent in light shielding property, tearing strength, and impact resisting strength, but also enhanced in low temperature heat sealing property and excellent in slip characteristic and blocking resistance characteristic without the stickiness of the film surface. CONSTITUTION: In a laminated film containing a light shielding layer (A) formed of a composition consisting of an ethylene copolymer and a light shielding material and a heat sealing layer (B), the heat sealing layer (B) consists of a layer mainly containing a copolymer of ethylene and an α-olefin having 3 or more carbon atoms which is manufactured by use of a metallocene polymerized catalyst and has a melt flow rate MFR of 0.1-10g/10mins. and a density of 0.88-0.93g/cm under 190 deg.C and a load of 2.1kg according to ASTM D1238-65T.