# What is HT-PLA / heat-resistant PLA (and PLA-CF) good for?

Polymaker HT-PLA is a PLA you can anneal. As printed, its heat-deflection temperature is 61.4 °C (143 °F) at 0.45 MPa, close to ordinary PLA. After annealing, that HDT is 107.2 °C (225 °F). PLA-CF is not that material: Polymaker lists PLA-CF at 54 °C (129 °F) HDT, and it is the abrasive row.

Polymaker HT-PLA is a PLA you can anneal. As printed, its heat-deflection temperature is 61.4 °C (143 °F) at 0.45 MPa, close to ordinary PLA. After annealing, that HDT is 107.2 °C (225 °F). PLA-CF is not that material: Polymaker lists PLA-CF at 54 °C (129 °F) HDT, and it is the abrasive row.

Use Polymaker HT-PLA when you can anneal the part and you want the annealed heat-deflection numbers. As printed, it is still a PLA-neighborhood plastic. PLA-CF is a different product: abrasive, and not a heat upgrade on Polymaker's own table. [Heat](/answers/heat), [PLA versus PLA+](/answers/pla_vs_plaplus), [carbon fiber](/answers/cf), and [PLA printing](/answers/pla_print) are the pages this one should not repeat. [Drying](/answers/drying) has the 60 °C (140 °F) / 6 hour row.

## The thermal table

[Polymaker's HT-PLA data](https://wiki.polymaker.com/polymaker-products/more-about-our-products/documents/technical-data-sheets/pla/ht-pla) lists, as printed, HDT of 58.6 °C (137 °F) at 1.8 MPa and 61.4 °C (143 °F) at 0.45 MPa, and Vicat of 156.2 °C (313 °F). Annealed, HDT is 71.7 °C (161 °F) at 1.8 MPa and 107.2 °C (225 °F) at 0.45 MPa, and Vicat is 155.2 °C (311 °F). Glass transition on that sheet is 59.8 °C (140 °F). The intro line "up to 130 °C (266 °F)" is not one of those HDT cells. The [product page](https://wiki.polymaker.com/polymaker-products/polymaker-filaments/prime-materials/functional-pla/ht-pla) says "up to 150 °C (302 °F)" and defines heat stability as holding shape while not under a load.

The product page's anneal instruction is 30 minutes at 80–100 °C (176–212 °F), 100 °C (212 °F) recommended, with about 0.3–0.6% dimensional change. The same page then gives a thickness schedule: 30–60 minutes under 4 mm, 1–2 hours at 6 mm, 2–4 hours at 8 mm, and 3–6 hours at 10 mm, cooling in the oven. The TDS page's "3 minutes at 80–90 °C (176–194 °F)" does not match that schedule. The product FAQ also says only the GF version gains significant HDT from annealing, while the TDS table shows the unfilled grade's 0.45 MPa HDT rising from 61.4 °C (143 °F) to 107.2 °C (225 °F). Keep the table, and do not smooth over the FAQ.

[HT-PLA](/brand/polymaker/ht-pla) lists a nozzle of 210–230 °C (410–446 °F) and a bed of 25–60 °C (77–140 °F), the same window as the product page. It says the unfilled grade is non-abrasive and that a 0.2 mm nozzle is allowed. [HT-PLA-GF](/brand/polymaker/ht-pla-gf) is the hardened-nozzle row. The product page says it is 12% glass fiber. The [glance table](https://wiki.polymaker.com/polymaker-products/polymaker-filaments/technical-data-at-a-glance) lists annealed HT-PLA-GF HDT at 114.7 °C (238 °F) under 0.45 MPa. [Polymaker](/brand/polymaker) is the brand index. [PLA](/material/pla) is the material hub.

## PLA-CF is the other column

The same glance table lists PLA-CF at 54 °C (129 °F) HDT under 0.45 MPa and Vicat 64 °C (147 °F). PolyLite PLA on that table is 60 °C (140 °F) HDT. [PolyLite PLA-CF](/brand/polymaker/polylite-pla-cf) lists 190–230 °C (374–446 °F), a bed of 50–70 °C (122–158 °F), and a hardened nozzle. [Bambu PLA-CF](/brand/bambu-lab/pla-cf) lists the same nozzle and bed and is also flagged hardened. Fiber does not turn PLA into HT-PLA. [PETG-CF and PLA-CF](/answers/cf_petg) is the comparison with the unfilled plastics.

## The threads

[r/BambuLab 1mevr7y](https://www.reddit.com/r/BambuLab/comments/1mevr7y/) is a toughness test, not an anneal test. The score-7 comment asks for eSUN and ELEGOO PLA+ in the next round. [r/BambuLab 10k03sy](https://www.reddit.com/r/BambuLab/comments/10k03sy/) is layer lines at 0.08 mm. The score-6 comment questions that layer height. The other three links in the bank are a cold-plate question, a PLA Tough substitute, and stuck PLA-CF. They are not HT-PLA, and no excerpt was supplied.

Updated 2026-10-19. Sources accessed 2026-10-19. Use case: Heat resistance.

## Ranked filaments

| Rank | Filament | Nozzle | Bed | Price per kg |
| --- | --- | --- | --- | --- |
| 1 | Polymaker HT-PLA | 210–230 °C (410–446 °F) | 25–60 °C (77–140 °F) | — |
| 2 | Polymaker HT-PLA-GF | 210–230 °C (410–446 °F) | 25–60 °C (77–140 °F) | — |
| 3 | Polymaker Polylite PLA CF | 190–230 °C (374–446 °F) | 50–70 °C (122–158 °F) | — |

## What the community says

r/BambuLab 1mevr7y compares PLA Tough with a hammer. The score-7 comment wants a comparison against eSUN and ELEGOO PLA+. The score-3 comment is about continuing the experiment. r/BambuLab 10k03sy is layer consistency. The score-16 comment says open a ticket. The score-6 comment asks why a 0.08 mm layer was used. The bank titles on r/BambuLab 110jvxl, 1cpqeev, and 14t1d0o are a cold plate, a PLA Tough substitute, and PLA-CF in an AMS. No excerpt was supplied for those three, so this page does not quote them.

## Sources

- [Polymaker HT-PLA product page](https://wiki.polymaker.com/polymaker-products/polymaker-filaments/prime-materials/functional-pla/ht-pla) (manufacturer)
- [Polymaker HT-PLA technical data](https://wiki.polymaker.com/polymaker-products/more-about-our-products/documents/technical-data-sheets/pla/ht-pla) (datasheet)
- [Polymaker technical data at a glance](https://wiki.polymaker.com/polymaker-products/polymaker-filaments/technical-data-at-a-glance) (datasheet)
- [Polymaker HT-PLA technical data sheet PDF](https://cdn.shopify.com/s/files/1/0548/7299/7945/files/Polymaker_HT-PLA_TDS_EN_V1.1.pdf) (datasheet)
- [Community source, r/BambuLab 1mevr7y](https://www.reddit.com/r/BambuLab/comments/1mevr7y/) (reddit)
- [Community source, r/BambuLab 10k03sy](https://www.reddit.com/r/BambuLab/comments/10k03sy/) (reddit)
- [Community source, r/BambuLab 110jvxl](https://www.reddit.com/r/BambuLab/comments/110jvxl/) (reddit)
- [Community source, r/BambuLab 1cpqeev](https://www.reddit.com/r/BambuLab/comments/1cpqeev/) (reddit)
- [Community source, r/BambuLab 14t1d0o](https://www.reddit.com/r/BambuLab/comments/14t1d0o/) (reddit)

HTML: https://filamentfacts.com/answers/htpla