DC DOUBLE-WALLED SEWER METHOD FOR FRICTION COEFFICIENT DECREASES WITH INNER REINFORCEMENT

摘要

The present invention relates to a method for producing DC double-walled drain pipe for friction coefficient reduction and inner diameter reinforcement. More specifically, the present invention relates to a method for producing DC double-walled drain pipe for friction coefficient reduction and inner diameter reinforcement, which coats inner pipe formed in a inner diameter or the inner diameter with silicone while molding the DC double-walled drain pipe which continuously molds a groove part and a projection part externally, thereby increasing water permeability by friction coefficient reduction and improving hardness.