Among all the synthetic fibers in the world, polyester staple fiber (PSF) has become the fastest growing fiber. By polymerization process, polyester fiber was produced from purified terephthalic acid (PTA) and monoethylene glycol (MEG). Then a continuous polyester filament, called a fiber bundle, is obtained by melt spinning. Many other processes are applied to this trailer to further improve its performance. In the final stage, in order to obtain short fibers, these polyester filaments are cut into small fixed lengths, similar to cotton fibers. These small fibers are called polyester staple fibers (PSF).

Sometimes these polyester fibers are made from PET chips or polyester waste from PET bottles consumed after recycling. Those produced directly from PTA and MEG or PET chips are called Virgin PSF, while those made from recycled PET chips are called recycled PSF.

Polyester staple fiber is mainly used as padding for cushions and sofas. In addition to padding, polyester staple fibers are spun into polyester yarn and then knitted or woven into polyester fabric. There are two main types of PSF:

• Solid Polyester staple fiber 

• Hollow polyester staple fiber: This type of polyester staple fiber has conjugated, silicified, smooth and dry PSF characteristics 

According to the luster, PSF can be divided into semi-dark fibers and bright fibers.