What are PA6, Nylon PA66?
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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 heat resistance, nylon 66 is an outstanding candidate for metal replacement applications. Nylon 66 is very easy to process with a very wide process window. This allows it to be used for everything from complex, thin walled components to large thick walled housings.
Nylon PA66 is very easy to modify with fillers, fibers, internal lubricants, and impact modifiers. With the use of fiber reinforcements, the physical strength of nylon 66 can be improved five times that of the base resin. The stiffness of nylon 66 can be improved up to 10 times. With impact modifiers, the ductility of nylon 66 is comparable to polycarbonate. The use of internal lubricants improves on the already excellent wear resistance and friction properties on nylon 66. Its versatility allows it to be used in almost any application that requires high physical strength, ductility, heat resistance and chemical resistance.
What is the difference between PA6 and PA66?
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PA66 compared to PA6
absorbs slightly less moisture
higher modulus
better wear resistance
better short term heat resistance
PA6 compared to PA66
better ductility (due to higher toughness)
better long term heat resistance
better impact resistance in low temperatures
better surface quality
better creep resistance
better UV-resistance (depends on modification)
lower cost