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Nylon Fibers and Fabrics


NYLON vs. POLYESTER

SIMILARITIES: Fabrics composed of nylon and polyester fibers are similar in many respects.

  • They are similarly priced
  • Their melting points are nearly identical (approx. 480°F, 295°C)
  • They are similarly strong, with nylon having the edge.
  • They are quick-drying and mildew resistant.
  • Arguments exist on both sides about which fiber is better suited for UV resistance, and both will experience significant strength degradation over time with extended UV exposure.
  • Because nylon modestly outperforms polyester in abrasion resistance testing and is easier to dye, nylon is favored in outdoor luggage and sports applications.
  • Polyester is more resistant to stretching and shrinking than nylon, making nylon the preferred fiber for applications where stretch and shock resistance are required, such as in parachutes.
  • Both fibers are relatively non-hydrophilic, but being less moisture absorbent polyester is preferred in many anti-wicking applications, such as substrates for pressure sensitive diaphragms.
  • Both fibers retain their excellent properties under very low temperature conditions making either fiber an excellent candidate for upper and outer atmosphere applications.

DIFFERENCES: Where polyester and nylon diverge significantly is in their chemical behavior. They are chemical mirror images of each other. Polyester favors acidic environments (pH<7.0), while nylon favors alkaline environments (pH>7.0). Given exposure to the wrong chemical environment, either fiber will deteriorate rapidly, especially at elevated temperatures.

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