SHEET OR FILM OF LOW MOISTURE PERMEABILITY

摘要

PURPOSE:To obtain a sheet or film having low moisture permeability and being excellent in gas barrier properties, transparency, etc. CONSTITUTION:A substantially gel-free copolymer comprising 80-90wt.% derived by ring opening of a dicyclopentadiene monomer (e.g. dicyclopentadiene) and 20-10wt.% repeating units derived by ring opening of tetracyclododecene monomer (e.g. 6-methyltetra-cyclodecene) is hydrogenated to a degree of hydrogenation of the unsaturated bonds of the main chain of 98% or above to obtain a hydrogenated copolymer and this copolymer is made into a sheet or film of a draw ratio of 1.05-5.00.