The result shows that: the slubby multiple and length have large influences on twist of base yarn and slubby yarn, slubby space have a little influence which can be solved by increasing slubby length.

A tight curl, twist, or bend in a length of thin material, as one caused by the tensing of a looped section of wire.

The main factors affecting lay length of core strand of steel cord are draught speed, rotating speed of revolver, distance of laying, twist direction.