High-strength polypropylene line twist, good strange word, twist in the end what is it? The definition of high-strength polypropylene line twist: by twisting wire fiber structure, so that a relative angular displacement between the cross-section, tilted to change the line straight through the structure of the fiber axis. Twisted wire can have a certain strength, flexibility, elongation, gloss, feel and other physical and mechanical properties, with a number of twist per unit length, said common twist count (TPI) or twist count per inch (TPM) per meter .

Twist: rotate 360 ​​degrees around the axis of a twist.

Twist (S direction or Z direction): When the vertical yarn around the axis of rotation-tilt direction of the helix. S twist direction of inclination of the central line with the letter S, i.e., the right-hand or clockwise direction. Tilt direction with the letter Z twist to Z Central consistent, that the left hand or counterclockwise direction.

High-strength polypropylene line twist and strong relationships: twist and strength is proportional to the line, but after a certain degree of twist, strength decreased. Twist through the large, the twist angle increases, the line gloss difference, feel the difference; twist is too small, the occurrence of hairiness, feel loose. This is because the twist increases, increased friction between the fibers, so that a strong increase in lines. But twist increases, the axial component yarn becomes small, uneven stress distribution inside and outside the fiber, resulting in fiber breakage inconsistencies.

In short, the fracture properties of high strength polypropylene line, the force has a close relationship with a twist, twist and twist direction as needed and post-processing of the finished product, generally Z-twist.