Nylon (polymide), is synthesized by Gariel and Maass in the lab in 1889, and commerializd by Dupont in 1930s. Dupont name the fiber Nylon. Commercially available the most popular nylons include nylon PA 6, nylon PA 66, nylon PA 11 and nylon PA 12. The numerical nomenclature for nylon is derived from the number of carbon atoms in the diamine and dibasic acid monomers used to manufacture it. The ratio of carbon atoms is what gives each nylon type its unique property characteristics.  For further information, the RTP-company provides good overviews of PA6PA66


  • Flexibility
  • Impact resistance
  • Abrasion resistance
  • Chemical resistance
  • Long lasting toughness & durability
  • Low moisture pickup
  • Excellent dimensional stability

What are PA6, Nylon PA66?

Nylon PA6 is a tough, abrasion-resistant material. It has improved surface appearance and processability compared to nylon 66. It also can be molded about 80 degrees F (27 degrees C) lower with less mold shrinkage because it is slightly less crystalline. Adversely, nylon 6 has a lower modulus and absorbs moisture more rapidly than nylon 66. Moisture acts as a plasticizer, reducing tensile strength and stiffness and increasing elongation. But, while absorbed moisture reduces many properties, nylon owes part of its toughness to the plasticizing effect of moisture. As moisture content rises, significant increases occur in impact strength and general energy absorbing characteristics. Properly recognized and accounted for, the effect of moisture on the processing and properties of nylon need not be of great concern.
Nylon PA66 is one of the most versatile engineering thermoplastics. It is popular in every major market using thermoplastic materials. Because of its excellent balance of strength, ductility and