Ethylene-vinyl-alcohol-based copolymer resin composition, film, and multilayered structure

• Main Authors: UCHIDA, HISAO, NAKAI, YOSHIHIRO, KUDO, KENJI, NAKAJIMA, TAKUYA, TAKESHITA, KEISUKE
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2021
• 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

Provided is an ethylene-vinyl-alcohol-based copolymer resin composition that has a superior gas barrier property under a high humidity condition, in particular, an oxygen barrier property under a high humidity condition, said composition containing an ethylene-vinyl-alcohol-based copolymer (X) and a metal compound and satisfying formula (1). (1): [Delta]A2=A2-A2,0 > 0 (A2 represents the second virial coefficient when a static light-scattering measurement of the ethylene-vinyl-alcohol-based copolymer resin composition is performed by using hexafluoroisopropanol as a solvent, and A2,0 similarly represents the second virial coefficient of the ethylene-vinyl-alcohol-based copolymer (X) in the ethylene-vinyl-alcohol-based copolymer composition.).