Phaetus aeForce™ PET-CF Filament 1kg Spool

Phaetus aeForce PET-CF — 15% Carbon Fiber Reinforced PET, 1.75mm, 1kg

A carbon-fiber-reinforced PET engineering filament for functional, load-bearing parts. The PET base brings low moisture sensitivity (relative to nylon), high strength, creep resistance, good chemical resistance and high heat resistance; the 15% chopped carbon fiber adds stiffness and a matte finish while suppressing PET's tendency to warp. Phaetus's "Smart Fiber Reinforced Technology" forms a fiber mesh inside the material so prints stay dimensionally stable with minimal shrinkage. Prints fine on an open-frame machine — no heated chamber required.

What it prints well

• Stiff functional parts: brackets, mounts, jigs, fixtures, drone and RC frames, tooling.
• Parts that see heat or humidity — PET-CF handles both better than PLA-CF and is less moisture-fussy than nylon-CF.
• Matte black finish that hides layer lines.

Print settings (from Phaetus's TDS)

• Nozzle / print temp: 280-320°C
• Bed / build plate: 60-80°C
• Print speed: 30-90 mm/s (45 mm/s in the datasheet test)
• Cooling fan: low/off
• Enclosure: not required
• Density: 1.30 g/cm³ · Melting temp: 251°C

Hardened nozzle required (abrasive)

Carbon fiber is abrasive — it will chew through a standard brass nozzle quickly. Run a hardened steel, DLC-coated, tungsten carbide, or ruby nozzle. If you don't already have one, add a hardened nozzle to your order. A 0.4mm hardened nozzle is the baseline; 0.6mm+ feeds CF more reliably and is more wear-tolerant.

Keep it dry

PET's moisture absorption is low but it prints poorly when wet — expect stringing, popping/bubbles in the extrusion, and a rough surface. Dry before printing: oven at 100-120°C for 4-6 hours, then print straight from a dry box held below 15% RH. A filament dryer or sealed dry box is strongly recommended for any CF-filled engineering material.

Optional: annealing

Heat deflection is ~87°C as printed. Anneal finished parts at 80-100°C for 4-8 hours (Phaetus tests at 100°C/8h) to raise heat resistance toward ~175°C and increase strength. Let parts cool to room temperature naturally.

Single 1kg spool, 1.75mm, black. Sold as-is from inventory — verify your printer hotend can reach 300°C+ and has a hardened nozzle before ordering.