Bambu TPU 90A • Soft Flexible Filament

Need soft, tough prints that bend and bounce back? Bambu TPU 90A is Bambu’s soft flexible filament for cushioning, grips, and parts that take repeated flex without cracking. It sits firmer than Bambu TPU 85A while staying elastic. Soft TPU is picky about feeding and speed — dry it before you print.

What's Included

• 1.75 mm Bambu TPU 90A, 1 kg net
• High-temperature reusable ABS spool (about 200 mm × 67 mm; spool rated to 90°C per TDS)

Print Settings

• Nozzle: 200–250°C (Bambu specimen jobs often near 225°C)
• Bed: 30–35°C
• Cooling fan: on
• Speed: keep default volumetric limits; do not raise max volumetric speed
• Dry before printing: oven 70°C for 8 h, or printer heat bed 90°C for 16 h (TDS)
• Turn off Flow Dynamics Calibration so Bambu’s fine-tuned TPU profile can run
• Store sealed under about 20% RH with desiccant
• Unload tip (X/P): heat nozzle to about 250°C, retract, and pull by hand — soft TPU can jam if cut residue stays in the extruder

Material

• Shore 90A soft TPU with more structure than TPU 85A
• Diameter: 1.75 mm
• Density: about 1.24 g/cm³
• Tensile strength (X-Y): about 12.5 MPa
• Elongation (X-Y): over 650%
• Impact strength (X-Y): about 124.2 kJ/m²
• Strong wear resistance for parts that bend repeatedly

Good To Know

• Printers: H2S, H2D/H2C (right inlet), X Series, P Series, and A Series
• Nozzles: 0.4 / 0.6 / 0.8 mm recommended — not for 0.2 mm or High Flow nozzles
• Build plates: Smooth PEI or Textured PEI; glue optional if adhesion is weak
• AMS / AMS lite / AMS 2 Pro: not compatible for auto-feed
• AMS HT: sealed/dry chamber only — use the dedicated TPU outlet, not normal AMS auto-feed
• PLA/PETG multi-material with TPU 90A: H2D / H2C only
• Frozen and Blaze are single-pass soft gradients (colour shift appears once per 1 kg spool)

Good For

• Shoe soles, RC tires, and grippy functional parts
• Padding, cushions, and protective soft parts
• Tool handles and wearables that need flex
• Soft + hard combos on H2D / H2C with PLA or PETG