What is Polyester? Polyester Defined.
What is Polyester? Polyester Defined.

What is Polyester? Polyester Defined...


Polyester can be defined as “long-chain polymers chemically composed of at least 85% by weight of an ester and a dihydric alcohol and a *terephthalic acid”. In a nutshell, this means the linking of several esters within the fibers. The reaction of alcohol with carboxylic acid results in the formation of esters. Polyester can also be easily classified as saturated and unsaturated polyesters.

Characteristics of polyester

  • Polyester fabrics and fibers are very strong.
  • Polyester is very durable: resistant to most chemicals, stretching and shrinking, wrinkle resistant, mildew and abrasion resistant.
  • Polyester is hydrophobic in nature and quick drying.
  • Polyester retains its shape and hence is good for making outdoor clothing for harsh climates.
  • It is easily washed and dried.


Terephthalic acid