Glass fiber

Glass Fibre Filaments for Engineering Applications

When conventional 3D printing materials cannot provide sufficient rigidity or dimensional stability, glass-fibre-reinforced filaments offer an alternative.

GF composites contain short glass fibres dispersed throughout a thermoplastic polymer. These fibres can increase stiffness, reduce shrinkage and improve dimensional stability under mechanical loads.

Glass fibre reinforcement is particularly useful in engineering polymers such as nylon, where it can help control warping and improve dimensional accuracy.

These materials are widely used for manufacturing equipment, robotics, mechanical assemblies and functional engineering components.

Applications for Glass-Fibre-Reinforced Filaments

GF filaments are suitable for a variety of demanding applications:

• Manufacturing tools and fixtures - jigs, assembly aids and production equipment.
• Mechanical brackets - rigid mounts, connectors and structural components.
• Robotics - manipulator components, mounting brackets and mechanical housings.
• Electronics enclosures - rigid, dimensionally stable housings for technical equipment.
• Functional prototypes - parts used for mechanical testing and design validation.

Glass Fibre vs Carbon Fibre Filaments

Both glass fibre (GF) and carbon fibre (CF) are used to reinforce thermoplastic materials, but their properties and advantages differ.

Carbon fibre composites often provide higher stiffness relative to weight, while glass fibre composites can offer a good balance between mechanical performance and cost.

Glass-fibre-filled materials also generally retain better electrical insulation properties than electrically conductive carbon fibre composites.

However, the actual performance depends on the base polymer, fibre content and manufacturing formulation. Comparing technical specifications is more reliable than choosing based on fibre type alone.

Printing with GF Filaments

Glass-fibre-filled filaments are abrasive and can quickly wear down standard brass nozzles. A hardened steel or other wear-resistant nozzle is recommended, and some formulations may benefit from a larger nozzle diameter.

Printing temperatures, enclosure requirements and drying conditions depend on the base polymer. Nylon-based GF composites, in particular, require careful moisture management to maintain consistent printing quality.

Find the right glass fibre filament for your engineering project in our online store. Compare material properties and order with delivery across Europe.