Molybdenum disulfide (MoS2) filled Nylon 66 represents one of the most established self-lubricating engineering plastic solutions in industrial applications. This material combination addresses a fundamental challenge in mechanical design: achieving reliable performance in applications where traditional lubrication is impractical, undesirable, or impossible to maintain.
What Makes MoS2 Special? Molybdenum disulfide is a solid lubricant with a layered crystal structure that allows molecular planes to slide over each other with minimal resistance. When incorporated into Nylon 66 matrix at typical concentrations of 2-5%, MoS2 creates internal lubrication pathways that significantly reduce friction and wear without requiring external grease or oil [3][4].
- Density: 1.15 g/cm³
- Coefficient of Friction: 0.23 (dry sliding conditions)
- Hardness: Shore D 85
- Tensile Strength: 12,000 psi
- Flexural Strength: 17,000 psi
- Continuous Operating Temperature: 220°F (105°C)
- Thermal Expansion: Lower than unfilled Nylon 66
Key Performance Advantages: The addition of MoS2 to Nylon 66 delivers multiple benefits that justify its premium positioning. First, the coefficient of linear thermal expansion decreases, making the material more dimensionally stable under temperature variations—critical for bearing and bushing applications where clearance tolerances matter [4]. Second, wear resistance improves substantially, extending component service life in high-cycle applications. Third, the material maintains Nylon 66's inherent impact resistance while gaining enhanced load-bearing capabilities [5].
MoS2-filled Nylon 6/6 has a lower coefficient of linear thermal expansion than unfilled Nylon 6/6, making it a better choice for bearings. The material offers self-lubricating properties and improved wear resistance with high load-carrying capabilities [4].
