Microscopic Properties:
Longitudinal Section (L.S.): Nylon has a smooth, uniform, rod-like profile.
Cross Section (C.S.): The cross section of nylon is circular, but can be modified to a three-leaf shape in order to develop surfaces that do not adhere to the wearer's skin and provide adequate permeability.

Physical Properties:

Length: The length of the filament is controlled by the manufacturer according to the end use.

Tenacity: Nylon is a strong fiber with a dry strength of between 4.6 and 8.8g/d due to its crystalline polymer system, with a strength loss of about 10-20% under wet conditions.

Elongation and elastic recovery rate: Nylon elongation is about 16-50%, with excellent elastic recovery rate. The existence of strong hydrogen bonds in the structure is the reason for nylon's good elasticity.

Resiliency: Nylon has good resilience and is not easy to wrinkle or crease.  Heat setting can further improve the resilience of nylon.

Density: Nylon is a very light fiber with a density of about 1.14g/

Thermal Properties: Nylon is a thermoplastic fiber that can be heat-cured. Some hydrogen bonds break when heated and reform where needed when cooled, so they can be shaped, softened and fixed by heat.

CHEMICAL PROPERTIES:

Acids: Nylon has good resistance to mild acids, but is damaged by strong acids.

Alkalis and Organic Solvents: Alkali will not damage nylon fibers.

OTHER PROPERTIES:

Nylon has good anti - moths, anti - mildew and anti - corrosion properties.

Nylon has the disadvantage of electrostatic formation.

Nylon is moderately resistant to sunlight.