METHOD FOR ULTRASONICALLY WELDING AND BONDING SYNTHETIC RESIN FILM

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently bonding both end parts of plastic films to be bonded by ultrasonic waves using an ultrasonically fusible and bondable synthetic resin film without superposing the end parts of the plastic films one upon another. SOLUTION: Two plastic films are arranged so that both ends thereof are opposed to each other at a predetermined interval and a flat surface is formed at least in the vicinity of both end parts and, subsequently, an ultrasonically fusible and bondable synthetic resin film is arranged at least on the single side of the plastic films so as to cover at least the predetermined interval and both end parts and melted by ultrasonic waves to put in the space of the predetermined interval to bond both end parts of two plastic films.