Rupturable fluid container and elements containing same

Disclosed herein are containers useful for holding fluids, e.g. photographic processing materials, in photographic film units. Such containers have strong seals along certain marginal areas and relatively weak seals along other marginal areas. Such weak seals are designed to open and distribute flui...

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Bibliographische Detailangaben
1. Verfasser:	CAWLEY, JOHN D
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR ADHESIVES AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS AUXILIARY PROCESSES IN PHOTOGRAPHY CHEMISTRY CINEMATOGRAPHY COMPOSITIONS BASED THEREON DYES ELECTROGRAPHY HOLOGRAPHY MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS POLISHES PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE 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
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Beschreibung
Zusammenfassung:	Disclosed herein are containers useful for holding fluids, e.g. photographic processing materials, in photographic film units. Such containers have strong seals along certain marginal areas and relatively weak seals along other marginal areas. Such weak seals are designed to open and distribute fluid over a sheet of film or paper when pressure is applied to the container in a camera. Each weak seal is formed from a sealing composition comprising a copolymer of (a) at least about 50 percent, by weight, of a polymerizable monomer having the formula (I): wherein n is an integer of from 0 to 3; R1 is hydrogen or alkyl; and R2 is hydrogen, alkyl or phenyl; with (b) a copolymerizable monomer having the formula (II): wherein R3 is alkyl. This copolymer has a glass transition temperature of at least about 80 DEG C.