Patent ID: 6165573
Filing Date: 2000-12-26
Classification: B32B,B65D,Y02W,Y10T

Abstract:
A multi-layer laminate consisting essentially of:(A) a layer consisting essentially of at least one cycloolefin resin selected from the group consisting of(a-1) an ethylene/cycloolefin random copolymer comprising constituent units derived from cycloolefin represented by the following formula (1) or (2) and constituent units derived from ethylene and(a-2) a graft modified product of the ethylene/cycloolefin random copolymer (a-1), ora layer consisting essentially of a cycloolefin resin composition consisting essentially of at least one cycloolefin resin selected from the group consisting of the ethylene/cycloolefin random copolymer (a-1) and the graft modified product (a-2), and (b) a polyolefin, and(B) a barrier layer consisting essentially of ethylene/vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC) or polyacrylonitrile (PAN), and having an oxygen permeability, as measured at a temperature of 23.degree. C. and RH of 0%, of not more than 10 cc(SPT).mm/m.sup.2.24 hr.atm,said multi-layer laminate having a moisture permeability of not more than 0.2 g.mm/m.sup.2.24 hr.atm and an oxygen permeability of not more than 5 cc(STP).mm/m.sup.2.24 hr.atm; ##STR130## wherein n is 0 or 1; m is 0 or a positive integer; q is 0 or 1; R.sup.1 to R.sup.18, R.sup.a and R.sup.b are each independently an atom or a group selected from the group consisting of a hydrogen atom, a halogen atom and a hydrocarbon group; R.sup.15 to R.sup.18 may be bonded to each other to form a single ring or plural rings each of which may have a double bond; R.sup.15 and R.sup.16, or R.sup.17 and R.sup.18 may form an alkylidene group; and when q is 0, the bonding hands are bonded to each other to form a five-membered ring; ##STR131## wherein m is 0 or a positive integer; h is 0 or a positive integer; i and k are each 0, 1 or 2; R.sup.7 to R.sup.15 and R.sup.17 to R.sup.18 are each independently an atom or a group selected from the group consisting of a hydrogen atom, a halogen atom and a hydrocarbon group; and R.sup.19 to R.sup.27 are each independently an atom or a group selected from the group consisting of a hydrogen atom, a halogen atom, a hydrocarbon group and an alkoxy group.