Fibreheart PET-GF

PET-GF by Siraya Tech · Multiple (Flat Dark Earth, Olive Green, White, Black)

Diameter

1.75mm

Nozzle temperature

290–300°C (rec. 300°C)

Bed temperature

75–85°C (rec. 80°C)

Print speed

30–120 mm/s

Density

1.3 g/cm³

CRITICAL: This filament requires a hardened steel nozzle (or higher grade) due to the 15% glass fiber content — do NOT use a standard brass nozzle. The TDS lists Max Extrusion Volumetric Speed as 20mm³/s at 320°C; since the P2S is capped at 300°C, this value has been conservatively reduced to 12mm³/s. The manufacturer's recommended nozzle temp of 300°C is exactly at the P2S hardware limit — monitor for any thermal runaway triggers and ensure the hotend is in good condition. Cooling fan must remain OFF to prevent warping and cracking, as required by the manufacturer and reinforced by the enclosure requirement. Retraction distance is set to the midpoint of the 1–3mm range (1.5mm); on a Direct Drive system like the P2S, start at the lower end and increase only if stringing persists. Annealing at 95°C for 4 hours in aluminum oxide sand can significantly improve HDT and hardness (optional post-processing step). Dry filament at 100–120°C for 4–6 hours if moisture signs appear (popping, poor surface quality).