WIDTH JOINING PROCESS OF COMPOSITE FILM

摘要

PURPOSE:To bond the mutual ends of composite films strongly by fusion welding by a method wherein a belt type film of the same structure films so as to oppose the surfaces of the same kind films each other, thereafter, the belt type film is bonded by fusion welding. CONSTITUTION:A belt type film is pinched between the ends of two sheets of composite films so that the polyolefin series resin film surface or the soft vinyl chloride series resin film surface of the composite film is opposed to the polyolefin series resin film surface or the soft vinyl chloride series resin film surface of the belt type film, thereafter, width joining of both composite films is effected while pinching them between a pair of roller electrodes of a high-frequency fusion welding machine.