Patent Number: 6,165,573

Title: Multi-layer laminates and uses thereof

Abstract: The present invention provides a multi-layer laminate consisting essentially of: (A) a layer formed from an ethylene/cycloolefin random copolymer which is a copolymer of ethylene and a cycloolefin represented by a specific formula (e.g., tetracyclododecene), or a layer formed from a cycloolefin resin which is a graft modified product of the ethylene/cycloolefin random copolymer, or a layer formed from a cycloolefin resin composition comprising the cycloolefin resin and a polyolefin, and (B) a barrier layer consisting essentially of ethylene/vinyl alcohol copolymer, polyvinylidene chloride, or polyacrylonitrile, with the barrier layer having an oxygen permeability, as measured at C. and RH of 0%, of not more than 10 cc(STP).mm/m.sup.2.24 hr.atm; said multi-layer laminate having a moisture permeability of not more than 0.2 hr.atm and an oxygen permeability of not more than 5 cc(STP).mm/m.sup.2.24 hr.atm. This multi-layer laminate has excellent gas-barrier properties and high rigidity. The present invention also provides a packaging material and a film using the multi-layer laminate.

Inventors: Hirose; Toshiyuki (Waki-cho, JP), Nishijima; Shigetoshi (Waki-cho, JP), Yamamoto; Yohzoh (Waki-cho, JP), Kawachi; Hideshi (Waki-cho, JP)

Assignee: Mitsui Petrochemical Industries LTD

International Classification: B32B 27/32 (20060101); B32B 27/08 (20060101); B65D 65/40 (20060101); B65D 75/28 (20060101); B65D 75/34 (20060101); B32B 027/08 (); B32B 027/06 (); B32B 027/30 (); B32B 027/32 ()

Expiration Date: 12/26/2017