Container for high purity liquid chemicals and its use

• Main Authors: ITO, YOSHIAKI, KAWAI, KEIJI
• Format: Patent
• Language: English; French; German
• Published: 11.04.2001
• Edition: 7
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BABY COMFORTERS; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICALPURPOSES; CONVEYING; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; DEVICES FOR RECEIVING SPITTLE; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGINGPHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL ORADMINISTERING FORMS; HANDLING THIN OR FILAMENTARY MATERIAL; HUMAN NECESSITIES; HYGIENE; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MEDICAL OR VETERINARY SCIENCE; 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

There is herein provided a container for high purity liquid chemicals, which never deteriorates the quality of a liquid content and which is easy to handle. A container for high purity liquid chemicals is characterized in that it is a container obtained by blow molding an inner layer, which consists of a high purity resin comprising at least one member selected from the group consisting of olefinic polymers of ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1 or octene-1 and copolymers of ethylene and olefins other than ethylene; an intermediate layer of a solvent-barrier resin, which comprises at least one member selected from the group consisting of polyamides, polyvinyl alcohols, poly(ethylene-co-vinyl alcohols), polyesters and polyphenylene oxides; and an external layer consisting of a light-shielding substance-containing resin composition, that the container has a lowest absorbance for the whole layers, as determined at a wavelength of not more than 400 nm using a spectrophotometer, equal to not less than 2.0; that an absorptivity coefficient as determined at a wavelength of 400 nm or the absorbance at that wavelength for the whole layers of the container divided by the thickness of the layers, is equal to not less than 1.5 mm<-1> ; and that an absorptivity coefficient as determined at a wavelength of 600 nm is equal to not more than 1.5 mm<-1>.