Polyester Fiber PSF

On the one hand, virgin fiber is produced from purified terephthalic acid (PTA) and monoethylene glycol (MEG). On the other hand, recycled fibre is obtained from recycled PET shavings, polyester waste or post-consumer PET bottle flakes.

The process begins with polymerization. At this stage, the PTA is mixed with MEG at high temperature and pressure, forming a molten polymer. This is followed by cast-spinning, which involves extruding the hot polymer through small nozzles to form continuous filaments.

These filaments then go through a stretching process, which aligns the molecules and improves the strength of the fiber. Subsequently, crimping is applied, which is a technique to ripple the fiber and give it volume and elasticity. Finally, the filaments are cut into fixed lengths, thus obtaining the short polyester fibers.

In this way, the process makes it possible to obtain both virgin and recycled polyester fibres, adapting to different industrial needs.