what material is polyester

Polyester is a synthetic fabric that is usually derived from petroleum. It is a category of polymers that contain the ester functional group in every repeat unit of their main chain. Polyester can also be made from other sources, including recycled plastic, agricultural crops, or even waste. Chemically, polyester is a polymer primarily composed of compounds within the ester functional group. Polyester is thermoplastic, meaning it can be melted and reformed. When making polyester, chemists melt polyester pellets and force them through small holes (spinnerets). On the exit side of the spinnerets, the continuous filaments of what we know as polyester fibers solidify. Polyester is used in a wide variety of applications, including clothing, upholstery, and industrial products, due to its strength and ability to retain its shape. Polyester fabrics are highly stain-resistant since polyester is a hydrophobic material, making it hard to absorb liquids.