Source: Polymaker

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Caution: Hot

Polymaker Releases HT-PLA and HT-PLA GF

by Shawn Frey
Published May 30, 2025

The company says its new high-temperature PLA has a softening temperature of 150 ºC without post-processing.

Filament producer Polymaker has launched two new high-temperature materials to its standard lineup: HT-PLA and HT-PLA-GF.

The materials maintain the easy, low-temperature printability of PLA and are stable at high temperatures off the build plate, Polymaker says, with an impressive Vicat softening temperature (VST) just above 150 ºC. In a YouTube video accompanying the material’s announcement, Polymaker Creative Director, Luke Taylor, demonstrated HT-PLA’s stability surpassing even Polycarbonate at oven temperatures over 160 ºC.

For stability under load, Polymaker released HT-PLA-GF – a glass-filled version of the material. The reinforcement prevents warping during the annealing process, a form of post-processing that helps materials maintain stability under load at higher temperatures, but the fillings do compromise the softening temperature somewhat, with the material data sheet showing a VST of 145 ºC. But annealing should more than make up for that, anyway. Taylor showed the concept in the announcement video by re-running the demonstration with an annealed HT-PLA-GF part. It’s overall impressive for a PLA material that would just require a harder nozzle to work with.

The filaments seem like a good bet for outdoor applications, or for use in frequently hot environments like vehicles, while keeping printing relatively easy. No enclosure required. And affordable, too, with HT-PLA running $26.99 per kilo and HT-PLA-GF $32.99.

You can find more details about the materials on their respective product pages, where you can also download technical data sheets.

Polymaker HT-PLA