WATER-SOLUBLE LAMINATED FILM

摘要

PURPOSE:To provide a novel film like functional material excellent in gas barrier properties, rapid water solubility and heat weldability and having high paper strength. CONSTITUTION:A water-soluble laminated film has such a structure that water- soluble paper is laminated on a film like material composed of a water-soluble polymeric compound obtained by reacting a polyalkylene glycol (A) produced by the addition polymerization of alkylene oxide pref. containing 50% or more of ethylene oxide and an org. compound having two active hydrogen groups with divalent carbloxylic acid (B), an anhydride thereof or lower alkyl ester thereof. Lamination is pref. performed by hot pressure bonding.