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    • 6. 发明专利
    • HELICAL PIPE
    • JP2001145954A
    • 2001-05-29
    • JP32966899
    • 1999-11-19
    • SEKISUI CHEMICAL CO LTD
    • KURITA TORU
    • C08J5/00B29C53/78F16L11/16H02G9/06
    • PROBLEM TO BE SOLVED: To provide a highly weatherable helical pipe which can be easily molded and displays physical properties such as impact resistance, compression strength, tensile strength and burning resistance as required qualitative items well in balance and further, shows superb moldability and long run performance. SOLUTION: A resin composition to be used for this helical pipe comprises a blend of 100 pts.wt. acryl-vinyl chloride graft copolymer with an acrylic rubber component content of 3-6 wt.% and 2-5 pts.wt. polyethylene cloride for the former. A strip-shaped synthetic resin profile is contour-extruded and molded using the resin composition. This profile has a fitting part which is bifurcated and has parting stopper parts mounted opposite to each other on the inner edge of an open end, formed on one edge and an engaging part fitted and engaged in a slidable manner in the fitting part, formed on the other edge. In addition, the profile is wound helically and is formed into a cylindrical shape by mutually fitting the fitting part and the engaging part which are adjacent to each other in such a wound state.