Patent ID: 6534580
Filing Date: 2003-03-18
Classification: C08K,C08L

Abstract:
A resin material comprising (a) a resin comprised of a saponified ethylene-vinyl ester copolymer and (b) at least one alcohol having a 1,3-diol backbone represented by the formula: wherein R1 represents a group selected from the group consisting of a hydrogen atom, a hydroxyalkyl group, an alkyl group, an amino group and an atomic group having an amino group; R2 represents an atomic group having both a hydroxyl group and a total atomic weight of its constituent atoms of at least 31; R3 to R6 represent a hydrogen atom or a lower alkyl group, said atomic groups being composed of at least two atoms selected from the group consisting of hydrogen, carbon, nitrogen, oxygen, phosphorus and sulfur atoms, and said alcohol having a solubility parameter (SP) in (cal/cm3)1/2 and a molecular weight (MW) which satisfy the following inequalities:SP&gE;12 SPÃ—MW&gE;235, with the proviso that when there are at least two alcohols, SP and MW are an averaged solubility parameter and a weight average molecular weight respectively, andwherein said mater satisfies at least one relationship selected from the group consisting of the following relationships (I) and (II)ln(OTR22.5)+4.78 ln(Fy/Fyâ€²)T2âˆ’T1&lE;20â€ƒâ€ƒ(I) in whichFyâ€² is a yield strength of a standard saponified ethylene-vinyl acetate copolymer at 60Â° C.; Fy is a yield strength of said resin material at 60-C; OTR is an oxygen gas permeability (cc/m2Â·dayÂ·atm) of said resin material per a unit thickness of 1 &mgr;m at 23Â° C. and a relative humidity of 0%; T1 is a haze (%) of a film of said resin material having a thickness of 30 &mgr;m after being maintained at 23Â° C. and a relative humidity of 48% for 48 hours; and T2 is a haze (%) of a film of said resin material having a thickness of 30 &mgr;m after being maintained at 40Â° C. and a relative humidity of 90% for 24 hour; and ln(OTR/22.5)+0.0698(Timâˆ’157)â€ƒin which OTR is an oxygen gas permeability (cc/m2Â·dayÂ·atm) of said resin material per a unit thickness of 1 &mgr;m at 23Â° C. and a relative humidity of 0%; and Tim is a melting point of said resin material.