| 摘要 |
PURPOSE:To make the titled device excellent for mechanical strength, heat resistant property, chemical resistance and stain resistance by a method wherein a plural number of tubes made of polytetrafluoroethylen (PTFE) and outer frame sleeves made of PTFE are made in a body by heat fluxing fluorine resin. CONSTITUTION:Heat resistance materials of prefarably powder form or particle form having flowability at the extent of to be able to take honeycomb constructin in the inside of the tube made of PTFE are filled. Heat fluxing fluorine resin films or tubes are wound or covered at the outer periphery of both ends. A plural number of tubes are gathered so as both ends are neary equal and outer frame sleeves 3 made of PTFE are inserted at the circumference of both ends, and the outside circumferential part is secured by the securing frame such as metalic mold etc., and tubes are heated, for instance, by a heater 5 provided at the outside of the securing frame. Tubes and outside frame sleeves are pressure welded in a body each other by the expansion pressure generated at this time, tubes are deformed to the honeycomb type and a multi-tube type heat exchanger can be obtained. |
