Flexible TPU 90A 3D printer filament, c-tech, signal blue RAL5005, 1.75 mm, 1 kg

c-tech Flexible TPU 90A is a thermoplastic polyurethane filament in signal blue (RAL5005) with a 1.75 mm diameter on a 1 kg spool. With a Shore hardness of 90A, this TPU combines notable elasticity with strong abrasion resistance, making it suitable for printing flexible and durable parts. The filament is formulated for reliable extrusion on both direct-drive and Bowden systems when correct print settings are applied, and it is intended for users who need resilient functional parts in a vivid blue color.

Advantages

This TPU 90A filament offers a balance of flexibility and toughness: it recovers its shape after deformation, resists wear, and provides dependable layer adhesion when printed with appropriate speeds and temperatures. The 1.75 mm diameter and consistent spool winding support smooth feeding and reduce jams. Signal blue coloration (RAL5005) yields uniform color for visible functional parts or aesthetic components.

Suitable for

• Flexible gaskets, seals, and O-rings
• Wearable items and accessories that require comfort and flexibility
• Shock-absorbing parts, bumpers, and protective covers
• Prototyping flexible mechanisms and hinges
• Small flexible fixtures and custom grips

Key specifications

• Material: Thermoplastic polyurethane (TPU)
• Shore hardness: ~90A (flexible, high resilience)
• Color: Signal blue (RAL5005)
• Filament diameter: 1.75 mm
• Spool weight: 1 kg
• Suitable extrusion systems: Direct-drive and Bowden (with tuned settings)
• Typical properties: High elasticity, abrasion resistance, good layer adhesion

How to use

Load the 1.75 mm filament into a compatible extruder and ensure the printer path is clear to avoid buckling. Select print settings optimized for TPU 90A: use moderate extrusion temperature appropriate for TPU, reduced print speed compared with rigid filaments, and retraction settings adapted for flexible materials (shorter distance or disabled retraction depending on the extruder). A heated bed can improve adhesion; use a suitable build surface or adhesives if needed. Calibrate flow and first-layer height to secure reliable prints and monitor the initial layers for correct extrusion.

Usage recommendations

For best results, print with a direct-drive extruder or tune a Bowden setup for flexible filaments. Use lower print speeds (for example, 15–30 mm/s), adjust retraction to minimize filament stretching, and set extrusion temperatures according to your printer and filament supplier guidelines. Store the filament in a dry environment or sealed container with desiccant to prevent moisture uptake that can affect print quality.