FLEXIBLE MULTI-LAYER STRUCTURE AND ITS WRAPPING APPLICATION

摘要

PURPOSE: To guarantee excellent layer release resistance in both before and after sterilization using a vapor by specifying a polymer adhesive in a layer of a vinylidene chloride copolymer bonded to a layer of a plasticized vinyl chloride polymer by an aid of the polymer adhesive. CONSTITUTION: In a flexible multilayer structure having a layer of vinylidene chloride copolymer bonded to a layer of a plastic vinyl chloride polymer or particularly a structure in which the polymer is bonded by a polymer adhesive containing a vinyl acetate polymer, a mixture of a vinyl acetate polymer and a methyl methacrylate is contained as the adhesive, and a product of a content (weight) of the vinyl acetate represented by % and a dynamic viscosity at 100 deg.C and 1 sec<-1> represented by kp sec is larger than 1.3×10<3> to be used. The vinyl acetate polymer is a two-component copolymer of the vinyl acetate containing 60 to 90 pts.wt. of vinyl acetate and an ethylene.