PA – Polyamide

PA material, polyamide or commonly called nylon, is manufactured by Ensinger in standard stock shapes for machining in sheet, rod and tube. There are often numbers associated with nylon plastics types such as 6, 66, 12 and 46. These numbers relate to the molecular structure of the nylon polymer and each structure type will have different properties. The most common polyamide plastics are Nylon 6 extruded, cast PA 6 and Nylon 66 (PA66).

Generally speaking, PA Nylon is a semi crystalline thermoplastic with low density and high thermal stability. Polyamides are among the most important and useful technical thermoplastics due to their outstanding wear resistance, good coefficient of friction, and very good temperature and impact properties. In addition, nylon polyamide exhibits very good chemical resistance and is an especially oil resistant plastic. This excellent balance of properties makes the PA polymer an ideal material for metal replacement in applications, such as automotive parts, industrial valves, railway tie insulators and other industry uses, whose design requirements include high strength, toughness and weight reduction. Nylon plastic shows a propensity to absorb moisture and thus has poorer dimensional stability than other engineering plastics. Polyamide properties vary from the hard and tough PA 66 to the soft and flexible PA 12. Depending on the type, polyamide products absorb differing amounts of moisture, which will, in turn, affect the nylon properties, in addition to the dimensional stability of the finished machined part.

Furthermore, there is a distinct difference between nylon shapes produced by extrusion and those produced by casting. Extrusion typically provides for smaller, higher volume machined parts, while casting typically allows for low volume, larger parts containing lower levels of internal stress. Both extruded and cast nylons can be modified through the use of fillers to enhance certain properties.


Polyamide plastic offers:

  • High wear resistance
  • High thermal stability
  • Very good strength and hardness
  • High mechanical damping characteristics
  • Good sliding properties
  • Good chemical resistance
extruded Nylon, PA 66, PA 6


Ensinger manufactures PA polyamides under the tradenames TECAMID and TECAST.  The Ensinger Nylon product families of engineering plastics contains the following polyamides:

  • TECAMID 6 (Nylon 6 – PA 6)
  • TECAMID 66  (Nylon 66 – PA 66)
  • TECAMID 12  (Nylon 12 – PA 12)
  • TECAMID 6/3 (Nylon 63 – PA 63)
  • TECAST T (Cast Nylon 6 – PA 6 C)
  • Polyamide modifications

This post is also available in: Spanish