| 摘要 |
The present invention relates to a DC double wall sewage pipe for reinforcing an inner diameter and reducing a friction coefficient. More specifically, the DC double wall sewage pipe is shaped to have continuous groove units and protruding units on the outside and coats an inner diameter pipe formed in the inner diameter or the inner diameter with silicon, thereby reducing friction coefficients and enhancing water flow properties while reinforcing the inner diameter to enhance its strength. The DC double wall sewage pipe has continuous protruding units (11, 11a) and groove units (12, 12a) extruded and shaped on the inner diameter of the flat inner diameter pipe (13). A silicon coating unit (14) is shaped to coat the inner diameter of the inner diameter pipe (13) at the thickness of 1.5 to 4 mm, thereby reducing friction coefficients and enhancing water flow properties. The silicon coating unit (14) is formed by coating a compound by using one of the extrusion or spray methods to color the inner surface. The compound includes: 93.5-97.5 wt% of a synthetic resin; 2-6 wt% of silicon; 20.5-1 wt% of TiO; and a small amount of a dispersing agent. |
