Suzhou Anmei Material Technology Co., Ltd. nmei
Suzhou Anmei Material Technology Co., Ltd.

Performance and Applications of Nylon 66

Nylon66, also known asnylon 6, 6, polyamide-66 or polymerized from hexamethylenediamine and adipic acid, has good comprehensive properties such as high strength, good rigidity, impact resistance, oil and chemical resistance, wear resistance, and self-lubrication, and especially superior properties of hardness, rigidity, heat resistance and creep resistance. In addition, raw materials are easy to obtain and cost is low, so it is widely used in industrial, clothing, decoration, engineering plastics and other fields. PA66's melting point is higher than PA6's, has excellent heat resistance, high elasticity modulus, low water absorption, and better performance as a molded product, especially because of its good heat and oil resistance, it is suitable for producing mechanical parts around automotive engines and parts of electronic and electrical products that are easy to be heated. Currently, PA66 accounts for 63% of its application in vehicles, 22% in electronic and office automation equipment, and 5% in machinery and optics, so the market sales of PA66 composite materials are growing rapidly. In recent years, with the rapid development of automotive, electrical, communication, electronic, mechanical and other industries, higher and more demanding requirements have been put forward for PA66 products, which has also accelerated the process of high performance of PA66 and its composite materials.

Nylon66's Properties

  • Good stress cracking resistance

  • The best wear resistance polyamide

  • Good heat resistance and belongs to self-extinguishing material

  • Good self-lubrication, second only to PTFE and POM

  • Excellent oil resistance and soluble in phenol and formic acid

  • High mechanical strength and good chemical stability

  • Adding carbon black can improve its weather resistance

PA6 and PA66

PA6 and PA66's chemical and physical properties are similar but PA6's melting point is lower, and its process temperature range is wide, and it has stronger impact resistance and solvent resistance. The differences between PA6 and PA66 are compared below :

Structural UnitPolycondensation from hexanediamine adipateCaprolactam polycondensation
Melting PointUp to 260℃Low melting point, about 40 ℃ lower, with a wide range of process temperatures
Heat ResistanceGood heat resistancePoor temperature resistance
Mechanical PropertyPA66 has good rigidity and better elastic modulusPA6 has good toughness, better impact resistance and dissolution resistance than PA66
Other PerformanceHowever, it is difficult to dye, difficult to color, and has a better feel than nylon 6More hygroscopic
ApplicationTyre cords and hot water resistant washing fabrics, as well as woven fabrics, on industrial gears such as marine propellersClimbers, automotive structural components
PriceNylon 66 is more expensive than nylon 6

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