Glass-Filled Nylon
Glass-filled nylon, typically PA6 or PA66 with 15–30% glass fibre (GF30), is much stiffer, stronger and more dimensionally stable than unfilled nylon, and handles higher temperatures. It suits structural parts, housings and brackets that must hold shape under load.
What it is
Glass fibres reinforce the nylon, raising tensile strength and stiffness substantially and reducing creep and moisture-related dimensional change. The trade-off is lower impact toughness and a more abrasive surface.
Glass-filled nylon is mostly injection moulded, but rods and sheets are available for machined parts.
Typical applications
- Structural brackets and housings
- Automotive under-bonnet parts
- Electrical insulators and terminal blocks
- Pump and fan components
- Machine parts needing stiffness
Materials & grades
- PA6 GF15/GF30
- PA66 GF30
- Heat-stabilised and flame-retardant grades
Points to consider
- Glass fibres wear mating surfaces; avoid as a bearing against soft metals.
- Machining glass-filled grades wears tools faster.
- Fibre orientation in moulded parts affects strength and shrinkage.
- Lower impact strength than unfilled nylon.
Frequently asked questions
What does GF30 mean?
It means the material contains 30% glass fibre by weight, for example PA66 GF30.
Is glass-filled nylon stronger than normal nylon?
Yes, much stiffer and stronger, with better dimensional stability, though less impact resistant.
Is glass-filled nylon good for bearings?
Not usually. The fibres are abrasive; unfilled or lubricated nylon or PTFE-based materials are better for bearings.