Nylon 66 (Poly(hexamethylene adipamide))

✔ Mechanical Properties

• High Strength & Rigidity:

Tensile strength: 60-80 MPa

Flexural strength: 100-120 MPa

Flexural modulus: 2000-3000 MPa

Suitable for high-load applications requiring dimensional stability.

Wear Resistance: Low coefficient of friction for bearings, gears, and wear-resistant components.

✔ Thermal Properties

• Melting Point: 252-260°C (486-500°F)

• Moisture Absorption: Equilibrium moisture absorption: 2.5%

• Brittle Temperature: Down to -35°C (-31°F)

• Heat Resistance:

Short-term tolerance: 80-120°C (176-248°F)

Long-term use requires humidity control for dimensional stability.

✔ Chemical Stability

• Corrosion Resistance:

Resistant to greases, oils, and most inorganic salt solutions.

Susceptible to strong acids, alkalis, and certain solvents.

Hygroscopicity: Moisture absorption affects dimensional accuracy; processing parameters must be adjusted per environmental conditions.

✔ Processing Characteristics

• Molding: Suitable for injection molding/extrusion at 260-290°C (500-554°F).

Critical Note: Avoid exceeding 300°C (572°F) to prevent degradation.

Shrinkage Rate: 1%-2% (reducible to 0.2%-1% with glass fiber reinforcement).

Its superior properties enable wide use in:

• Engineering plastics

• Mechanical components (gears, bearings)

• Automotive parts

• Premium consumer textiles