HEAT RESISTANT PRESSURE VESSEL AND MANUFACTURE THEREOF

PURPOSE:To make the heat sterilization possible by a method wherein a heat- crystallized part, which is locally heat-crystallized, is provided at the bottom part of a vessel main body and at the same time all the region excluding the heat-crystallized bottom part is stretched by high draw ratio. CON...

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Bibliographische Detailangaben
Hauptverfasser:	SHIMOJIMA KOHEI, SUZUKI TORU, WATANABE SUKETAKA
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 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:	PURPOSE:To make the heat sterilization possible by a method wherein a heat- crystallized part, which is locally heat-crystallized, is provided at the bottom part of a vessel main body and at the same time all the region excluding the heat-crystallized bottom part is stretched by high draw ratio. CONSTITUTION:The bottom part 2B of a vessel main body 2 is turned in a heat-crystallized part 4, which is produced by locally crystallizing the central part of the bottom part 2B by heat. All the region excluding the heat- crystallized part is turned into a highly stretched part 5, which is stretched thin by high draw ratio. The heat-crystallized part 4 is in stretched and unoriented crystalline state and has high strength and keep a stable form. Further, since crystalline orientation generates in the interior of material due to the stretching action of the material, the highly stretched part 5 has high strength and also is excellent in shape retention, resulting in allowing to heighten the heat resistance and pressure resistance and to be used as a vessel for various contents having high sterilizing temperature and consequently to realize a more widely used heat resistant and pressure vessel.