A METHOD OF PRODUCING A SAPONIFIED ETHYLENE-VINYL ACETATE COPOLYMER RESIN COMPOSITION AND A LAMINATE AND SHAPED ARTICLE COMPRISING THE COMPOSITION

摘要

The saponified ethylene-vinyl acetate copolymer(EVOH) resin composition of the present invention isa composition comprising a saponified ethylene-vinylacetate copolymer (EVOH) (A) having an ethylene contentof 20-60 mole percent and a saponification degree ofnot less than 90 mole percent, magnesium acetate or/andcalcium acetate (B) as an essential component and atleast one of acetic acid (C), a boron compound (D) andsodium acetate (E) as an optional component, and ischaracterized in that the contents of the respectivecomponents in said composition, relative to 100 partsby weight of EVOH (A), are as follows: magnesium acetateor/and calcium acetate (B) 0.001-0.02 part by weighton the metal basis; acetic acid (C) 0-0.05 part byweight: the boron compound (D) 0-1 part by weight onthe boron basis; and sodium acetate (E) 0-0.1 part byweight on the metal basis: and that the weight loss whensaid composition is maintained at a temperature (T +70)°C higher by 70 °C than the melting point T °C of saidEVOH (A) for 1 hour is not more than 10% by weight.The laminate of the present invention ischaracterized in that a layer of a thermoplastic resinis disposed at least one side of a layer consisting ofthe EVOH resin composition mentioned above.