The Reinforcements
What's glass-fiber filament?
A base polymer, often nylon, PETG, PC or PP, with short glass fibers mixed in for strength and stability.
- Gainsdimensional stability, strength
- Losesimpact resistance
- Needsa hardened nozzle
Base plasticnylon (PA), PETG, PC, PPMixed inchopped glass fibers
Nozzle 240–285 °C · Bed 70–110 °C
Prusa, for fiber-filled filaments (depends on the base). Typical ranges from one maker’s data sheet. Brands differ: the label on your spool wins.
Why it matters
- Like carbon fiber, glass fiber stiffens the base plastic and helps it hold its shape and heat.
- It is just as abrasive, and parts are more brittle than the plain plastic.
Tips from the workshop
- Hardened steel nozzle only.
- Print it like its base plastic: the label tells you which.