Polyesters (Polyester) (PET or PES codes) are some of the polymers that contain esters. As a particular substance, it is commonly referred to as polyethylene terephthalate or polyethylene terephthalate. Polystyrene contains chemicals derived from natural reactions, such as those found in the shells of the Kayhan shells, as well as polymerization syntheses of bridges like polybutylate. Natural polyesters and some synthetic polyesters can be biodegradable, but this property does not contain more polyesters from synthesizing. Due to the polyester structure, they may be thermoplastic or thermosetting. There are also polyesters that can be soluble in hardening agents, but most of the polystyrene is thermoplastic.

Polyester is further used in synthetic fiber structure. Synthetic fibers derived from dimethyl terephthalate (DMT) or terephthalic acid and ethylene glycol (standard polyester fiber or commercial type of terylene trillene), or from 1 and 4 in methylole cyclohexane (vestan or Kodel) produced by the production of zirconium be.
The mass production of these fibers has begun since 1945, and today, with a global production of 21 million tons in 2002, it has the largest share of fiber production.
Characteristics: The density of 1.38 g / cm3, high tear strength, good elasticity, abrasion resistance, very good light stability, high resistance to mineral and organic acids (decompose in concentrated sulfuric acid)
The polyester fibers do not wrinkle and fade, they also do not mix, rinse well and dry quickly. Available scenarios: Filament yarns, cross-sectional fibers (mixed with wool, cotton, and carpet type). Fibers, fibers, spunbond fabrics and all types of haute cord fibers (in English) : Hollow fiber and double fiber