TPU Filament Fiberlogy FiberFlex 40D — flexible 3D printing filament, white, 1.75 mm

Fiberlogy FiberFlex 40D is a flexible TPU filament for 3D printing in white with a 1.75 mm diameter. It is formulated to produce elastic, tear-resistant parts with good layer adhesion and surface finish. The material balances softness and mechanical strength, making it suitable for producing gaskets, wearable components, vibration-damping elements and other flexible functional parts on FDM printers that support TPU.

Advantages

FiberFlex 40D offers high elasticity combined with dimensional stability and consistent extrusion behavior. It provides reliable layer bonding for functional prototypes and end-use parts, prints well at moderate speeds on properly configured extruders, and yields smooth, resilient surfaces that withstand bending and repeated deformation. The filament’s white color is suitable for post-processing, painting or dyeing when required.

Suitable for

• Sealing gaskets and O-rings for low to medium compression applications
• Wearable parts such as straps, flexible clips and orthotic prototypes
• Vibration and shock absorbing mounts or pads
• Functional prototypes requiring elasticity and repeated flexing
• Custom grips, bumpers and soft-touch housings

Key specifications

• Material type: Thermoplastic polyurethane (TPU) with shore-like softness suitable for flexible parts
• Diameter: 1.75 mm designed for standard small‑nozzle FDM extruders
• Color: white, suitable for post-processing and finishing
• Flexibility: high elasticity with good recovery after deformation
• Adhesion: good interlayer bonding for durable printed parts
• Application: compatible with hobby and professional FDM printers that accept flexible filaments

How to use

Load the filament into an extruder configured for flexible materials and ensure a direct-drive or a suitably constrained Bowden path to minimize filament buckling. Use a nozzle temperature and print speed recommended for TPU materials, calibrate retraction to low values or disable it if stringing occurs, and set a moderately slow print speed to maintain dimensional accuracy. Print with an appropriate build surface or adhesive to ensure first layer adhesion, and allow parts to cool gradually to preserve elasticity and surface quality.

Usage recommendations

For best results, use a direct-drive extruder or a short, guided filament path, reduce retraction distance and speed, and print at controlled temperatures and moderate speeds. Store the filament in a dry place or sealed container with desiccant to prevent moisture uptake, which can affect print quality and flexibility.