HEAT FUSION BONDING AUXILIARY MATERIAL FOR THERMOPLASTIC RESIN TUBE AND METHOD FOR BONDING THERMOPLASTIC RESIN TUBE

摘要

PROBLEM TO BE SOLVED: To provide a heat fusion bonding auxiliary material for a novel thermoplastic resin tube in which the resin tube is hardly deformed in the case of the heat fusion without necessity of using a clamp in an electrofusion without generating a bead on an inner surface in butt fusion.;SOLUTION: The heat fusion bonding auxiliary material 20 for the thermoplastic resin tube comprises a cylindrical part made of a water soluble resin which can be melt molded. A method for bonding the thermoplastic resin tube comprises the steps of: engaging the cylindrical part 20 made of the water soluble resin which can be melt molded at the inside of a bonding part with opposed ends of the two thermoplastic resin tubes 12, 14 when the opposed ends of the two tubes are bonded by thermal fusion; bonding the ends of the two tubes 12, 14 by the thermal fusion, and then removing the cylindrical part 20 by dissolving the part 20 in water.;COPYRIGHT: (C)2004,JPO