Polyester suture is a multifilament braided non-absorbable, sterile surgical suture which is available in green and white. Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term “polyester” as a specific material most commonly refers to polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics through step-growth polymerization such as polycarbonate and polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are non absorbable like the polyester suture.
Polyester suture is commonly used for cardiovascular surgeries, General Closure, Orthopedics. Polyamide suture fibres are tough, possessing high tensile strength, as well as elasticity and lustre. They are wrinkle-proof and highly resistant to abrasion and chemicals such as acids and alkalis. Glass transition temp of polyamide is 47 °C. The suture is coated with silicone so that the tissue adherence to the suture is minimal.