PP staple fibers with better bonding performance and more soft, high speed spinning are made on the line imported. The characteristics of this fiber are discussed as follows.

By modeling, the formulas for calculating the line peel-off intensity and the plane peel-off intensity were deduced, and the standard to estimate the bonding strength was put forward.

Main design index of bonding mixing equipment for impregnation in polyester spunbonded production line is introduced in the paper. The moving course of fluid is analyzed.