Fiberlogy FiberFlex 40D

Fiberlogy FiberFlex 40D is a TPU filament rated to a 45°C heat deflection temperature. This page collects its hardware, environmental, and handling requirements in one place so you can confirm your printer is up to the job before you load the spool.

Material Overview

Fiberlogy FiberFlex 40D is an engineering-grade 3D printing filament built on a TPU polymer base. With a heat deflection temperature of 45°C, it is engineered for functional parts that must hold their shape under load and elevated service temperatures — jigs, fixtures, brackets, ducting, and end-use components that would deform in a commodity material.

Selecting Fiberlogy FiberFlex 40D is a systems decision, not just a spool decision: the polymer base dictates your hotend, your chamber, and your drying workflow. The sections below translate the manufacturer’s data into the concrete hardware and environmental requirements your printer must satisfy.

At a glance

• Polymer base: TPU
• Heat deflection temperature: 45°C
• Nozzle requirement: Standard Brass OK
• Enclosure requirement: Open Air OK

Hardware & Environmental Requirements

The table below summarizes the hardware and environmental prerequisites for printing Fiberlogy FiberFlex 40D. Always confirm final values against the manufacturer’s official technical data sheet.

Nozzle & Hotend

Fiberlogy FiberFlex 40D is not abrasive, so a standard brass nozzle is perfectly suitable — there is no need to budget for hardened hardware. Keep spare brass nozzles on hand as normal wear items, and retune flow/temperature calibration whenever you swap one. CSV designation: Standard Brass OK.

Enclosure & Chamber

Fiberlogy FiberFlex 40D prints comfortably in the open air. No enclosure is required, though keeping the printer away from strong drafts or air-conditioning vents will still improve first-layer consistency and reduce edge lifting.

Frequently Asked Questions

Can I print Fiberlogy FiberFlex 40D with a standard brass nozzle?

Yes. Fiberlogy FiberFlex 40D is non-abrasive, so a standard brass nozzle is safe and recommended. There is no filler to wear down the orifice, so brass gives you the best thermal conductivity and surface finish at the lowest cost.

Does Fiberlogy FiberFlex 40D require an enclosure?

Fiberlogy FiberFlex 40D prints comfortably in the open air. No enclosure is required, though keeping the printer away from strong drafts or air-conditioning vents will still improve first-layer consistency and reduce edge lifting.

Does Fiberlogy FiberFlex 40D need to be dried before printing?

TPU is mildly hygroscopic but flexible and prone to stringing when damp. Dry at 50-60 °C for 4 hours as needed and store it sealed with desiccant; a dry spool dramatically reduces oozing and stringing.