Mineral fillers such as talc, kaolin and wollastonite improve the dimensional stability, surface hardness and creep resistance of PA without the abrasion concerns associated with glass fibre. The result is a compound with excellent stiffness-to-cost ratio, tight tolerances and a smooth surface finish — ideal for high-volume moulded housings.
Technical Specifications
| Base resin | PA6 / PA66 |
| Filler type | Talc / kaolin / wollastonite |
| Filler content | 10 – 40% |
| Density | 1.25 – 1.45 g/cm³ |
| Tensile strength | 50 – 75 MPa |
| Flexural modulus | 4 – 8 GPa |
| Shrinkage | 0.3 – 0.6% |
Applications
- Household appliance housings (vacuum cleaners, food processors)
- Automotive lever switches and interior trim
- Engine cover and air-intake components
- Lighting housings and luminaire bodies
- Subway station steps and handrail guides
- Industrial fastener bodies
- Precision consumer goods
Advantages
- Significantly lower coefficient of linear thermal expansion than unfilled PA — better dimensional stability
- Superior surface hardness resists scratching and handling damage
- Reduced warpage vs glass-filled grades — suited for large flat panels
- 7× lighter than steel
- Resistant to oils, fuels and mild chemicals
- Food- and water-contact compliant grades available
- Cost-effective performance upgrade over unfilled PA
Choosing the Right Filler
Talc gives the best surface finish and isotropic shrinkage. Wollastonite improves stiffness and reduces density. Kaolin offers a balance of both. Our technical team will recommend the optimal filler type and loading for your geometry, tolerance requirements and processing conditions.