Prusament PA11 Natural Arrives: The Pure Polyamide Built for Gears, Hinges, and Outdoor Parts

A Pure PA11, Not a Carbon Copy

Prusa has launched Prusament PA11 Natural, a pure polyamide filament that trades the carbon fiber of its PA11 CF sibling for the raw mechanical strengths of unfilled PA11. It's a deliberate move: the two materials solve different problems, and PA11 Natural is aimed squarely at parts that move, bend, and live outdoors.

PA11 is a semicrystalline thermoplastic derived from castor oil. It brings high impact resistance (even at low temperatures), excellent wear resistance, very low friction, and strong UV resistance — the combination that makes it a favorite for functional components rather than static prints.

Why Drop the Carbon Fiber?

Prusa already sells PA11 Carbon Fiber, which wins on high-temperature resistance and dimensional stability. Pure PA11 Natural goes a different way:

• Perfect layer-to-layer adhesion — parts are far less likely to split along layer lines under load.
• Excellent sliding properties — low contact friction makes it ideal for gears, bushings, and articulating mechanisms.
• High UV resistance — suitable for long-term outdoor use.

The Number That Matters: Anisotropy

Prusament PA11 Natural posts the highest tensile strength anisotropy coefficient of any Prusament: r = 0.84 when printed on a Prusa CORE One+. For context, PLA High Speed scores r = 0.60, while PLA and PC Blend sit at r = 0.33 and PETG at r = 0.38.

In plain terms, anisotropy near 1.0 means the part is almost as strong across the layers as it is along them. A vertically printed umbrella holder or a gear tooth is far less likely to delaminate under stress — which is exactly the failure mode that ruins functional prints.

What You Can Print

Prusa highlights practical examples: a Gardena hose connector for outdoor use where UV and mechanical resistance matter, and an umbrella holder printed standing up on the build plate to show off cross-layer strength. Gears are the headline use case thanks to the material's low-friction surface.

Mind the Hardware

Pure polyamides are unforgiving without a controlled environment. Prusa notes that printing PA11 reliably now depends on fully enclosed machines with active chamber heating — the CORE One+, CORE One L, and the industrial Prusa Pro HT90. Back in 2022, when PA11 CF launched, enclosed printers with enough chamber heat simply weren't in the lineup, and failure rates on pure PA were high. That gap has now closed.

Bottom Line

PA11 Natural isn't a step backward from carbon-filled PA11 — it's a complementary tool. If your print needs to flex, slide, resist weather, or survive being pulled across layer lines, pure PA11 is the smarter pick. For makers finally pairing a CORE One+ with a high-performance nylon, this is the filament that justifies the chamber.