MULTILAYER SQUEEZE TUBE-LIKE CYLINDRICAL CONTAINER

PURPOSE:To reduce the shrinkage accompanied with heating even in a high temperature sterilization and obtain excellent flexibility and oxygen barrier properties, by using as a material a laminated body made of a specific polymer composition and by irradiating the same with electron beams. CONSTITUTI...

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Main Authors NAKAJIMA SHIZUKA, SUGAWARA RYOJI, NAKAGAWA MIKIO, MAKUUCHI KEIZO, YOSHII FUMIO, KUSHIDA HIDEO, KAWACHI HIDESHI, KURIHARA TAKAHIRO
Format Patent
LanguageEnglish
Published 25.10.1994
Edition5
Subjects
ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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
GENERAL PROCESSES OF COMPOUNDING
HANDLING THIN OR FILAMENTARY MATERIAL
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PACKAGES
PACKAGING ELEMENTS
PACKING
PERFORMING OPERATIONS
STORING
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING-UP
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Summary:PURPOSE:To reduce the shrinkage accompanied with heating even in a high temperature sterilization and obtain excellent flexibility and oxygen barrier properties, by using as a material a laminated body made of a specific polymer composition and by irradiating the same with electron beams. CONSTITUTION:An internal/external layer is made of a composition of polyethylene with a density of 0.900-0.975g/cm and ethylene-alpha-olefin copolymer, which is partially or entirely graft-modified with unsaturated carboxylic acid or its derivative. An intermediate layer is made of oxygen barrier resin. This heat- resistant squeeze tube-like cylindrical container consisting of the internal, external and intermediate layers is irradiated with electron beams. In the internal/ external layer, the mixing ratio of the ethylene-alpha-olefin copolymer to the polyethylene is 5-50% in weight ratio. An electron beam absorbed-dose is 50-500 kGy. The oxygen barrier resin layer is a nylon or ethylene-vinyl acetate copolymer saponified layer.
Bibliography:Application Number: JP19930087637