Nylon Filament for 3D Printing: What It Is and What It Needs

Nylon is a tough, slippery, heat-tolerant engineering plastic that is also one of the harder filaments to print. It is sold as nylon or by its chemical name, polyamide (PA). This guide explains what it is good for, what a printer needs before it can run it, and why wet filament is the main thing that goes wrong. It is built from manufacturer documentation and has not been print-tested by Nozzle Notes.

What nylon filament is

Nylon is a family of polyamide plastics. Prusa's materials guide describes polyamide as a material with excellent thermal and mechanical resistance, suited to functional technical parts that must withstand heat and mechanical load. Prusa also rates it as very hard to print and recommends it for experienced users only.

Prusa lists these strengths: it is extremely resilient and resistant to abrasion, it has excellent layer adhesion, it is tough in large volumes while staying flexible in thin sections, its friction coefficient is low and its melting temperature is high. Those traits explain why nylon is chosen for gears, bushings and bendable parts.

Typical print settings

The figures below are Prusa's recommendations for pure polyamide and Elegoo's listing for a carbon fiber nylon. Your spool and printer profile take priority, and these are starting points, not tested values.

For comparison, Prusa's PLA guide recommends 210 to 215 °C at the nozzle and a 60 °C bed. Nylon asks for a far hotter nozzle and bed, so check that your hotend and bed can reach those temperatures before buying a spool. Our PLA vs PETG vs ABS vs TPU guide shows where common filaments sit on that scale.

Why moisture is the main problem

Polyamide is hygroscopic, meaning it pulls water out of the air. Prusa says improper storage can let it absorb water weighing up to 10% of the filament's weight. In its drying guide, Prusa notes that polyamide is affected quite significantly, while PLA does not change much by taking up humidity.

Wet nylon shows up as bubbles, uneven layers and an ugly surface. Prusa's drying guide lists polyamide, PVA and TPU as the filaments most often in need of drying. Its advice is to keep highly hygroscopic filaments in a dry environment or dry them before every print.

• Dry before printing. Prusa suggests at least 4 hours below 90 °C. Check that your spool and dryer can handle the heat: Prusa says its newer black Prusament spools resist drying temperatures as high as 90 °C, and older spools may need preparation.
• Store airtight with desiccant. See how to store filament and how to dry filament.
• Consider a dryer that can print from the box. Our filament dryer guide covers what to look for.

Warping and bed adhesion

Prusa calls warping the main disadvantage of pure polyamide, apart from moisture. An enclosure that holds a high ambient temperature helps a lot. Our guide to enclosed vs open-frame printers explains why that matters.

Adhesion is a second hurdle. Prusa sells a special PA sheet because polyamide adheres poorly to standard PEI sheets. Whatever printer you own, look for a bed surface or adhesive that the maker recommends for nylon.

Carbon fiber and glass fiber nylon

Many nylon products are filled with fibers. Prusa says its fiber-filled polyamide, such as Prusament PA11 Carbon Fiber, does not warp nearly as much as the unaltered versions and can be printed without an enclosure. Fibers generally improve dimensional stability and high-temperature resistance, but Prusa's composite guide also lists drawbacks: a more brittle filament, worse layer-to-layer adhesion and a higher risk of nozzle clogging.

Fibers are abrasive. Prusa says a hardened nozzle is necessary, and Elegoo recommends a hardened steel nozzle for its nylon carbon fiber product. Brass nozzles wear quickly with these filaments. Our nozzle size guide covers sizes, and Prusa's composite guide says larger nozzles and thicker layers reduce clogging risk.

Cost

Nylon costs several times more than basic PLA. On Elegoo's US store on 2026-10-10, PAHT-CF carbon fiber nylon was listed at 55.99 USD for a 1 kg spool, while its standard PLA was 13.99 USD. Other makers price differently, so check the current listing.

Safety

Prusa says polyamides emit a strong odor with potentially dangerous ultrafine particles, and that printing in a well-ventilated room or an enclosure is a must. Follow the filament maker's guidance and the Safety Data Sheet for your specific spool. This article is not medical or safety advice.

Is nylon right for your project?

If you are still choosing a machine, start with the first printer checklist, and use the print cost calculator to see what an expensive spool does to the price of a part.