POY, also known as pre-oriented yarn, refers to the partially drawn chemical fiber filament with orientation between Unoriented Yarn and drawing yarn obtained by high-speed spinning.

The filament is FDY and the low elasticity is DTY.

Compared with unstretched yarn, it has a certain degree of orientation and good stability, and is often used as the special yarn for drawing false twist textured yarn (DTY).

Stretched textured yarn (DTY), pre-oriented yarn (high-speed spinning) (POY), fully drawn yarn (one-step spinning and stretching) (FDY).

Low-elastic yarn is a kind of polyester chemical fiber textured yarn, which is spun into polyester pre-oriented yarn (POY) from polyester chips (PET) at high speed.

forming process

In the process of high-speed spinning (spinning speed is 3000-3500m/min), the filaments are subjected to great tension in the spinning field, so that macromolecules are partially oriented along the fiber axis, and partially oriented wound filaments are obtained.

trait

It has a high degree of orientation (general birefringence is 0.025-0. 060), large elongation at break (150- 100%) and low crystallinity (