the Introduction of PFY and PSF

In 1935, DuPont Chemical invented polyester fiber, which has become the most widely used fiber. Its chemical composition is polyester resin (polyethylene terephthalate). After PTA and ethylene glycol are reacted and polymerized, they are obtained by melt spinning. Of polymer tow. At present, more than 75% of the world's polyester is produced through a continuous polymerization process using PTA and ethylene glycol, and the remaining old process is a batch process that uses DMT and MEG to undergo transesterification. The catalyst in the polymerization such as Sb2O (3 antimony trioxide) is used to initiate and control the reaction, and titanium dioxide is added to darken the polyester fiber/filament. Spinning finishing agents are added to melt spinning and drawing machines to provide electrostatic protection, and have certain cohesion and friction properties, so that the fibers can be processed by later textile machinery.

Polyester filament PFY (Polyester Filament Yarn): Its physical properties include solid appearance, original color, white or dyed, no peculiar smell, melting point range 240-260°C, relative density 1.3-1.4 g/cm3, insoluble in general solvents. The main technology providers of PFY worldwide are DuPont, Toray, Teijin, Zimmer, Lurgi, Didier, Inventa, Chemtex, etc.

Polyester staple fiber PSF (Polyester Staple Fibre): After the polyester polymer is melt-spun, the tow undergoes further processes such as stretching, crimping, spinning and finishing, and then cut into a fixed length, so that the cut fiber and cotton The lengths of the fibers are almost equal. These cut fibers are called PSF. The main technology providers of PSF worldwide are Invista, EMS-INVENTA, Zimmer AG, and Noyvalesina.

Due to the continuous improvement of polyester's cost advantages and performance, its proportion in global fiber use continues to increase. At present, the global proportion of polyester used in fibers is close to 52%, while the proportion of polyester in the Indian market is only 37%. There is still a lot of room for improvement in the proportion of polyester in the future.

Suzhou Stplas Machinery's machine after crushing washing drying flakes can make PSF and PFY degree .

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