Polyamide 66 (PA66) [Nylon66]

General Information:

• Product Name: Polyamide 66 (PA66) or Nylon 66
• Classification: Semi-crystalline thermoplastic

Typical Properties:

• Density: 1.14 – 1.15 g/cm³
• Melt Flow Rate (MFR): Varies with grade and additives
• Tensile Strength: 60 – 85 MPa
• Elongation at Break: 40 – 250%
• Tensile Modulus: 2,200 – 3,100 MPa
• Melting Point: 255 – 265°C
• Glass Transition Temperature: 50 – 55°C
• Notched Izod Impact Strength: 55 – 100 J/m
• Moisture Absorption: Up to 2.5% (hygroscopic)
• Coefficient of Linear Thermal Expansion: 70 – 110 x 10^(-6) K^(-1)

 Features and Benefits:

• High Mechanical Strength: Strong and durable material, often more rigid than PA6.
• Wear Resistance: Exhibits good resistance against wear and abrasion.
• Good Chemical Resistance: Resistant against many oils, greases, aliphatic hydrocarbons. Sensitive to strong acids, chlorinated hydrocarbons, and UV radiation.
• Temperature Performance: Can withstand high temperatures, offering better heat aging properties than PA6.
• Hygroscopic: Absorbs moisture, which can affect mechanical properties.

Applications:

• Automotive: Under-the-hood components, radiator grills, headlamp covers.
• Electrical & Electronics: Connectors, housings, switches.
• Consumer Goods: Zippers, sporting goods, tool handles.
• Industrial: Bearings, gears, fasteners.
• Textiles: Used to produce nylon fibres for clothing and carpets.

Processing Methods:

• Extrusion (for fibres, films, and profiles)
• Injection Molding (for producing various components)
• Rotational Moulding

Environmental Impact and Recycling:

• PA66 can be recycled, though not as commonly as PET or PP. Recycling process includes depolymerization.
• Keep dry before recycling due to its hygroscopic nature.
• When incinerated, it releases water, carbon dioxide, and nitrogen without halogens, sulfur, or heavy metals.

Storage and Handling:

• Store in a cool, dry place, away from direct sunlight to avoid moisture absorption.
• Should be pre-dried before processing due to hygroscopic properties.
• Handle with care to avoid damage.

Safety Information:

• Generally safe for various consumer and industrial applications.
• Ensure adequate ventilation when processing or welding PA66 to avoid inhalation of fumes.
• Though not highly flammable, PA66 will burn and melt under direct flames.