Filament Spectrum S-Flex 90A 1.75 mm — Flexible TPU, 500 g, Pacific Blue

Spectrum S-Flex 90A 1.75 mm — Flexible TPU, 500 g, Pacific Blue is a thermoplastic polyurethane filament formulated for 3D printing flexible, durable parts. With a Shore A hardness of 90 and up to 500% elongation at break, this 1.75 mm filament on a 500 g spool combines elasticity with abrasion and chemical resistance. It offers good layer adhesion and reliable bed adhesion, low shrinkage and dimensional stability across a wide operating temperature range, making it suitable for functional prototypes and end-use components that require flexibility and wear resistance.

Advantages

Spectrum S-Flex 90A provides high wear resistance, reduced stringing during idle moves and stable material properties between −30 and +60 °C. The filament shows resistance to hydrocarbons, many industrial oils, weak and diluted acids and bases, as well as improved UV and aging resistance. Packaging includes vacuum sealing and a desiccant to maintain filament dryness and spool labeling with diameter and recommended printing temperature.

Suitable for

• Seals and gaskets with chemical resistance
• Bumpers, shock absorbers and vibration dampers
• Wearable or flexible prototypes and functional parts
• Snap-fit parts, sleeves, hinges and protective cases
• Guides and components requiring low shrinkage and good surface finish

Key specifications

• Material type: Thermoplastic polyurethane (TPU), flexible
• Diameter: 1.75 mm
• Spool weight: 500 g
• Color: Pacific Blue
• Hardness: Shore A 90
• Elongation at break: up to 500%
• Printing speed: recommended around 50 mm/s (depends on printer setup)
• Thermal stability: usable range approximately −30 °C to +60 °C
• Chemical resistance: resistant to hydrocarbons, common industrial oils, weak/diluted acids and bases
• Dimensional behavior: low shrinkage, good layer adhesion

How to use

Load the 1.75 mm Spectrum S-Flex 90A filament into a printer equipped or tuned for flexible materials. Use a direct-drive extruder or a well-calibrated Bowden setup with a short filament path and appropriate feeder settings to avoid slipping. Set the extrusion temperature and print speed according to the printer and nozzle; a starting point is the spool label’s recommended temperature and a print speed near 50 mm/s. Use a moderate retraction or disable rapid retraction to reduce clogging and stringing. Ensure the build surface promotes adhesion—brim or adhesion aids can help for large or thin parts. Store unused filament sealed with desiccant to avoid moisture uptake.

Usage recommendations

For best results with Spectrum S-Flex 90A, print with a direct-drive extruder when possible, slow down first layers for improved adhesion, and tune retraction and printing speed to your specific printer. Keep filament dry and follow the spool label for precise temperature guidance to achieve consistent flexible parts with minimal stringing and optimal mechanical performance.