TPU 90A 1.75 mm 1 kg filament — BambuLab flexible 3D printing material, Black

BambuLab TPU 90A 1.75 mm 1 kg filament — Black is a flexible thermoplastic polyurethane filament formulated for FDM/FFF 3D printing. With a Shore A hardness of 90 and a standard 1.75 mm diameter, this filament delivers a balance of elasticity and dimensional stability suitable for functional parts that require abrasion resistance, impact absorption and moderate flexibility. The 1 kg spool provides material for multiple small- to medium-sized prints and is compatible with printers that support flexible TPU materials and standard 1.75 mm filament spools.

Advantages

The TPU 90A filament combines wear resistance and tear strength with enough elasticity to produce gaskets, protective covers and ergonomic grips. Its 1.75 mm diameter ensures consistent feeding on most Bowden and direct-drive extruders when printing settings and retraction are adjusted for flexible filaments. The black color provides good visual contrast for functional prototypes and end-use parts while maintaining consistent layer appearance when printed at recommended temperatures and speeds.

Suitable for

• Seals and gaskets that require flexibility and compression recovery
• Wearable parts such as straps, clips and soft housings
• Grips, handles and protective covers that need impact absorption
• Functional prototypes and small production runs with flexible requirements

Key specifications

• Material: Thermoplastic polyurethane (TPU)
• Shore hardness: 90A
• Diameter: 1.75 mm nominal
• Spool weight: 1 kg
• Colour: Black
• Compatibility: FDM/FFF 3D printers supporting flexible filaments

How to use

Load the spool onto the printer so the filament can feed smoothly into the extruder. Use printer settings appropriate for flexible TPU: reduced print speed, increased extrusion multiplier as needed, minimal retraction or tuned retraction settings depending on your extruder type, and a print temperature typical for TPU (consult printer and filament guidelines). Print with a warm or unheated bed depending on adhesion needs; use a suitable build surface such as PEI, blue painter’s tape or a glue stick to improve first-layer adhesion. Allow printed parts to cool on the build plate before removal to reduce deformation.

Usage recommendations

For best results, print at lower speeds (typically 15–35 mm/s for flexible TPU), fine-tune retraction and extruder tension for your printer, and dry the filament before use if it has absorbed moisture. Test a small calibration print to validate settings for layer adhesion, dimensional accuracy and surface finish before starting larger or critical parts.