c-tech Filament TPU 90A 1.75 mm 1 kg — flexible 3D printer filament

c-tech Filament TPU 90A 1.75 mm 1 kg is a thermoplastic polyurethane (TPU) filament designed for FDM/FFF 3D printers that can handle flexible materials. With a Shore hardness of 90A and a 1.75 mm diameter, this black filament provides a balance of elasticity and dimensional stability suitable for parts that require flexibility, abrasion resistance and impact absorption. The spool contains 1,000 grams of filament and is intended for applications where a durable, slightly soft material is needed.

Advantages

The TPU 90A formulation combines good elasticity with wear resistance, enabling printed parts to flex without cracking while maintaining their shape. Its 1.75 mm diameter ensures consistent feeding on compatible extruders, and the recommended printing temperature range of 210–235 °C supports reliable extrusion for most printers configured for flexible materials. The material’s black color and consistent surface finish make it suitable for functional parts and prototypes that require a professional appearance.

Suitable for

• Seals and gaskets that need compression and resilience
• Wearable parts such as straps, clips, and flexible connectors
• Protective covers, bumpers, and impact-resistant housings
• Functional prototypes that require elasticity and tear resistance
• Small flexible components for robotics and consumer devices

Key specifications

• Material: Thermoplastic polyurethane (TPU), Shore 90A
• Diameter: 1.75 mm
• Net weight: 1,000 g (1 kg) spool
• Color: Black
• Recommended printing temperature: 210–235 °C
• Suitable extrusion systems: direct-drive and some Bowden setups (with adjusted settings)

How to use

Load the 1.75 mm filament into a compatible extruder, ideally a direct-drive system or a Bowden setup configured for flexible filaments. Set the nozzle temperature within the recommended range of 210–235 °C and use a slower print speed than for rigid filaments to avoid filament buckling or under-extrusion. Ensure proper retraction settings and a moderate layer cooling strategy to balance bridging and layer adhesion. Use a clean, level build surface and consider an adhesive or brim for small parts to improve bed adhesion.

Usage recommendations

For best results, print at reduced speeds (typically 15–30 mm/s), minimize long retractions, and use a direct-drive extruder when possible. Adjust print settings incrementally and perform test prints to dial in extrusion multiplier and cooling for consistent layer bonding and surface finish.