3D Printing InfoWhere it is used
Stiff brackets and fixtures; the Polymaker grade is aimed at parts annealed for heat resistance
Sources
- Polymaker HT-PLA-GF Technical Data Sheet V1.1 · 2026-08 · tds
PLA · Material guide
Glass-fibre PLA (PLA-GF)
PLA with 12–20 wt% chopped glass fibre; the Polymaker grade is designed to be annealed, which lifts HDT at 0.45 MPa from 75.5 to 114.7 °C.
Open in interactive comparisonUnderstand the material
At a glance
Before you print
- Setup difficulty
- Intermediate — dry filament and a tuned profile; hardened nozzle mandatory
- Nozzle wear
- Highly abrasive — standard GF composite
Read the full material overview
PLA with 12–20 wt% chopped glass fibre; the Polymaker grade is designed to be annealed, which lifts HDT at 0.45 MPa from 75.5 to 114.7 °C.
Applications
Glass-filled PLA is a more substantial engineering variation than a visual-effect PLA. The fibres increase stiffness, and specifically formulated high-temperature grades can develop better heat-deflection performance after annealing. For HT-PLA-GF, Polymaker reports separate as-printed and annealed results; that distinction matters when comparing it with ordinary PLA or another supplier’s glass-filled grade.
The resulting material is rigid but brittle, particularly across printed layers. It is therefore a poor default for parts whose main requirement is surviving impacts or repeated flexing. Annealing must also be considered part of manufacturing rather than an optional label: the final dimensions and properties are those of the treated part. A measured HDT at a stated load is not a continuous-use temperature for every shape and stress level.
Find printable models
Check the model’s material and process notes before choosing a filament.
Plan your printer setup
All print settings ↓Printing quick reference
Representative catalog values. Check the exact grade and its linked conditions before using a setting.
Nozzle temperature (°C)
210–230 (Polymaker HT-PLA-GF)
Full value & sources
210–230 (Polymaker HT-PLA-GF)
- Polymaker HT-PLA-GF Technical Data Sheet V1.1 · 2026-08 · tds
Bed temperature (°C)
25–60 (Polymaker HT-PLA-GF)
Full value & sources
25–60 (Polymaker HT-PLA-GF)
- Polymaker HT-PLA-GF Technical Data Sheet V1.1 · 2026-08 · tds
Enclosure
Open frame is fine
Drying
60 °C for 6 h (Polymaker HT-PLA-GF)
Full value & sources
60 °C for 6 h (Polymaker HT-PLA-GF)
- Polymaker HT-PLA-GF Technical Data Sheet V1.1 · 2026-08 · tds
Go deeper when you need to
48 documented fieldsProperties & source data
Open a topic to explore the complete data. Each value keeps its original conditions, units and dated sources.
Material & market7 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Base polymer / chemistry | PLA filled with chopped glass fibre — 12 wt% (Polymaker HT-PLA-GF), 15–20 wt% (eSUN PLA-GF). Bambu Lab PLA Galaxy uses glass microspheres, not fibre, and is not equivalent | 3 sources
|
| Density (g/cm³) | 1.31 (eSUN) to 1.337 (Polymaker), ISO 1183 / GB/T 1033 | 2 sources
|
| Typical price (USD/kg) | 1 kg spools cluster near 30 | 2 sources
|
| Price range across brands (USD/kg) | 30–60 across brands; Polymaker 30, Proto-pasta 60 | 2 sources
|
| Market availability (1–5) | Niche, a handful of specialist brands | 3 sources
|
| Spool sizes & diameters | 1.75 mm; 0.5 and 1 kg spools | 2 sources
|
| Typical applications | Stiff brackets and fixtures; the Polymaker grade is aimed at parts annealed for heat resistance | 1 source
|
Print settings7 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Nozzle temperature (°C) | 210–230 (Polymaker HT-PLA-GF) | 1 source
|
| Bed temperature (°C) | 25–60 (Polymaker HT-PLA-GF) | 1 source
|
| Enclosure / chamber requirement (1–5) | Open frame is fine | 1 source
|
| Part cooling fan | Fan on — eSUN specifies 100 % | 1 source
|
| Maximum volumetric flow (mm³/s; see test conditions) (mm³/s) | 28 at Polymaker's stated 350 mm/s on a 0.4 mm nozzle at 0.2 mm layer; eSUN prints its specimens at 60 mm/s | 3 sources
|
| Shrinkage (%) | 0.05 in X-Y and Z, 0.10 diagonal (Polymaker HT-PLA-GF) | 1 source
|
| Overall printing difficulty (1–5) | Intermediate — dry filament and a tuned profile; hardened nozzle mandatory | 1 source
|
Nozzle wear & reliability4 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Nozzle hardness required (1–4) | Hardened steel required | 1 source
|
| Abrasiveness (1–5) | Highly abrasive — standard GF composite | 1 source
|
| Nozzle clog risk (1–5) | Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites | 1 source
|
| Hotend requirement | Hardened steel or ruby nozzle; Polymaker's own slicer preset sets a minimum nozzle hardness of 40 HRC | 1 source
|
Moisture & drying3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Moisture absorption (hygroscopicity) (1–5) | Moderate — the PLA matrix takes up 0.40–0.51 % saturated; no glass-filled grade publishes its own figure | 2 sources
|
| Drying temperature & time | 60 °C for 6 h (Polymaker HT-PLA-GF) | 1 source
|
| Effect of moisture on strength | Polymaker rates PLA low-sensitivity and publishes no dry-versus-conditioned figures for this grade; absorbed water flashes to steam and shows as bubbling and poor layer adhesion | 1 source
|
Strength & mechanical properties14 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Tensile strength (XY) (MPa) | 50.1 as printed and 50.2 annealed, printed XY, ISO 527 (Polymaker); eSUN quotes 59.3 by GB/T 1040 | 2 sources
|
| Young's modulus (MPa) | 3794 as printed, 4207 annealed, printed XY, ISO 527 (Polymaker) | 1 source
|
| Elongation at break (%) | 2.77 as printed, 2.3 annealed, printed XY, ISO 527 (Polymaker); eSUN quotes 7.99 | 2 sources
|
| Flexural strength (MPa) | 86.4 printed XY, ISO 178 (Polymaker) | 1 source
|
| Flexural modulus (MPa) | 3685 printed XY, ISO 178 (Polymaker); eSUN quotes 4415 flexural modulus by GB/T 9341 | 2 sources
|
| Charpy impact, notched (kJ/m²) | 5.31 ± 0.46 as printed and 4.92 ± 0.50 annealed (printed XY, ISO 179, notched); Z 4.28 ± 0.18 | 1 source
|
| Other impact data | Izod 10.16 kJ/m² (eSUN, GB/T 1843) | 1 source
|
| Layer adhesion / Z tensile (MPa) | 23.7 as printed, 22.5 annealed, printed Z, ISO 527 (Polymaker) | 1 source
|
| Brittleness (1–5) | Very brittle — elongation at break 2.77 % in XY and 0.85 % in Z | 1 source
|
| Creep resistance / sustained load (1–5) | Poor — no GF-grade creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg | 3 sources
|
| Fatigue / repeated-flex resistance (1–5) | Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength and elongation at break falls to 2.77 % in XY and 0.85 % in Z | 2 sources |
| Elasticity / flexibility (1–5) | Rigid | 1 source
|
| Z strength as % of XY (%) | 47 as printed (23.7 Z against 50.1 XY), printed | 1 source
|
| Wear resistance & friction | eSUN describes high wear resistance and positions the grade for wear parts | 1 source
|
Heat & temperature5 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| HDT at 0.45 MPa (°C) | 75.5 as printed, 114.7 after annealing (ISO 75, 0.45 MPa) — the point of the material | 1 source
|
| HDT at 1.8 MPa (°C) | 59.7 as printed, 84 after annealing (ISO 75, 1.8 MPa) | 1 source
|
| Glass transition (Tg) (°C) | 59.8 (DSC) | 1 source
|
| Melting point / Vicat (°C) | 174.9 peak melt (DSC); Vicat 148.9 as printed, 148.3 annealed | 1 source
|
| Annealing response | Annealing lifts HDT at 0.45 MPa from 75.5 to 114.7 °C and modulus from 3794 to 4207 MPa | 1 source
|
Weather & chemical resistance1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| UV resistance (1–5) | Degrades within weeks outdoors | 1 source
|
Health & safety3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Fume toxicity (1–5) | Low hazard — minimal VOC and particle emission | |
| Ventilation / filtration requirement (1–5) | None needed in a normal room | |
| Dust & fibre handling hazard | Glass fibre is bound in the matrix; avoid inhaling sanding dust | 1 source
|
Finishing & post-processing1 field
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Dimensional accuracy & detail | Near-zero shrinkage — 0.05 % in X-Y and Z (Polymaker) | 1 source
|
Solvents & solubility3 fields
| Property and unit | Published value and conditions | Sources and dates |
|---|---|---|
| Soluble in | Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent. | 1 source |
| Softened or crazed by | Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts. | 2 sources
|
| Solvent welding & smoothing agent | Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists. | 2 sources |
How to read these values
Values describe representative grades, not every spool. Manufacturer datasheets and independent tests retain their source labels and dates. Printed orientation, test method, conditioning and formulation can change results. Unknown values are —. A listed use is not a certification. Shore A, Shore D and Rockwell hardness are separate scales.
Find a specific filament
2 listingsProduct listings and datasheets
Historical USD/kg snapshots. Read each listing’s sale/from qualifiers, spool mass, source date, shipping and tax notes. Product figures are separate from the material summary.
Browse 2 products from 2 brands
PolymakerHT-PLA-GF29.99 USD/kg
$29.99 / 1 kg spool, shop.polymaker.com, Aug 2026
12 wt% glass fibre. Annealing raises HDT at 0.45 MPa from 75.5 to 114.7 °C.
Open product listing ↗- Polymaker HT-PLA-GF — product page · 2026-08 · vendor
- Polymaker HT-PLA-GF Technical Data Sheet V1.1 · 2026-08 · tds
| Density (g/cm³) | 1.337 (ISO 1183) |
|
|---|---|---|
| Shrinkage (%) | 0.05 (X-Y and Z) |
|
| Young's modulus (MPa) | 3793.9 ± 129.2 (printed XY, ISO 527) |
|
| HDT at 0.45 MPa (°C) | 114.7 annealed, 75.5 as printed (ISO 75, 0.45 MPa) |
|
Proto-pastaWhite Glass Fiber HTPLA59.99 USD/kg
$59.99 / 1 kg spool; 500 g $34.99, proto-pasta.com product catalogue, Aug 2026
Handle white-glass-fiber-htpla.
Open product listing ↗- Proto-pasta White Glass Fiber HTPLA product page · 2026-08 · vendor
- Getting Started with Protopasta — print parameters and drying limits · 2026-08 · doc
| Spool sizes & diameters | 50 g coil, 500 g and 1 kg spools; 1.75 mm |
|
|---|---|---|
| Nozzle temperature (°C) | 195–225 (guide); up to 24 mm³/s at 240 |
|
| Bed temperature (°C) | 50–60 | |
| Maximum volumetric flow (mm³/s; see test conditions) (mm³/s) | 24 at 240 °C |
|
| Shrinkage (%) | about 1 in X-Y after heat treatment at 100 °C |
|
| Nozzle hardness required (1–4) | Hardened steel required |
|
| Continuous service temperature (°C) | 150 after heat treatment |
|
Keep exploring
All PLA guides ↗Related materials
PLA
High-Speed PLA
PLA with a raised melt index and tuned crystallisation so it can be extruded at roughly 24 mm³/s, about 30 % more flow than…
10 product listingsMouse Figure Remix ↗Printables listing uploaded by Q · CC BY 4.0Mouse Figure remix: Q (credit source) · Original Mouse Figure design: Whitney Richmond (credit source)Source image · Image bytes unchanged; displayed in full.
PLA
Matte PLA
PLA compounded with a chalk-type mineral filler for a diffuse finish; density rises to 1.31–1.38 g/cm³ and flexural strength…
10 product listingsOctonauts Fish Biscuit ↗Printables listing uploaded by Geoff · CC BY 4.0
PLA
PLA (standard)
A familiar starting point for models, prototypes and everyday prints at room temperature.
25 product listingsPen Holder — Desk Organizer ↗Printables listing uploaded by kaje · CC0 1.0Source image · Image bytes unchanged; displayed in full.
