Polymaker HT-PLA-GF is a glass fiber-reinforced PLA filament that holds its shape up to 150°C and prints on standard PLA settings at speeds up to 350 mm/s. The glass fiber adds stiffness and durability for functional parts, and annealing at 80–100°C for 30 minutes pushes heat deflection even higher. It suits makers printing brackets, jigs, ducts and other heat-exposed parts who want PLA-like ease without PLA's low softening point. The trade-off is abrasion: the glass fiber wears brass nozzles, so a hardened steel or ruby nozzle is required, and it is less forgiving than plain PLA on brittle, thin features.
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Rated 4.7 out of 5 from 58 ratings, buyers praise the heat resistance and the fact that it prints on familiar PLA settings. The main complaint is nozzle wear from the glass fiber.
Polymaker HT-PLA-GF is a glass fiber-reinforced PLA filament made for functional parts that need to handle heat. The glass fiber adds stiffness and durability.
It prints with standard PLA settings and supports speeds up to 350 mm/s, so no specialized tuning is required. The material is abrasive, so a hardened steel or ruby nozzle is recommended.
For a higher heat deflection temperature (HDT), anneal the printed part at 80-100°C for 30 minutes. 100°C is the recommended temperature.
