| 摘要 |
PURPOSE: To efficiently obtain an inner and outer surface smooth synthetic resin tube having excellent pressure resistant flat performance and hermetical sealability with a tube of an arbitrary diameter even at a place except a factory without necessity of high and complicated technology by coupling walls extended in a radial direction. CONSTITUTION: The opening of a synthetic resin profile 10 having a sectional shape of a hollow square shape, openings on the longitudinal wall 11 of one side and a protruding wall 14 protruding laterally outward at a longitudinal wall 13 of the other side or the one or both of the wall 14 are coated with an adhesive 5, and sequentially spirally wound. The adhesive 5 is cured to obtain a tube having substantially smooth cylindrical shape at the inner and outer walls 2, 3 and a spiral coupling wall 4 extended radially between both the walls 2 and 3. |
