Polyamide is a polymer containing monomers of amides joined by peptide bonds. They can occur both naturally and artificially, examples being proteins, such as wool and silk, and can be made artificially through step-growth polymerization, examples being nylons, aramids, and sodium poly (aspartate).

Due to their outstanding properties these material have become indispensable in almost all fields of engineering for the most varied components and machine parts, as high-quality electrical insulating materials and for many other special applications. Nylon is exceptional for its high mechanical strength, rigidity and thermal stability. Moreover, Nylon affords good impact resistance even at low temperatures, advantages sliding friction properties and problem-free processing. It is mainly used in Automobile, Engineering, Electrical, Electronics & Textiles industries.