PET-GF
Glass-Fiber-Reinforced Polyethylene Terephthalate
4 products from 4 makers. Bambu Lab lists PET-GF as a material type for the H2C; the listing covers the type, not each brand.
- Tensile modulus (XY)
- 4.13GPa
- 3 products · 4.13–4.14
- Tensile strength (XY)
- 70.9MPa
- 4 products · middle half 68.1–72.3
- Tensile strength (Z)
- 34MPa
- 3 products · 34–48.2
- Notched Charpy impact
- 6.56kJ/m²
- one product
- HDT at 0.45 MPa
- 120°C
- 3 products · 82–120
- Price
- 69CAD/kg
- 2 products · 41–98
PET-GF is a glass-fibre-filled polyethylene terephthalate. A maker sells it for functional prototypes, jigs, fixtures, automotive parts, brackets and enclosures. Its HDT at 0.45 MPa is 81.6–120 °C, and across the layers it keeps 48 % of its flat tensile strength. On the H2C its products all need a hardened nozzle, and makers call for dry storage and advise drying.
Partly documented Notched Charpy impact rests on 1 product, price on 2 products, tensile modulus (XY), tensile strength (Z) and HDT at 0.45 MPa on 3 products each and tensile strength (XY) on 4 products. Each figure is the median of the products that publish it comparably, and beside it the middle half of them; a value on a test bar no document describes as printed, or with no stated test load, is set apart, except a heat deflection of a plastic that cannot crystallise, which its glass transition sets, unless its document points to a moulded or resin bar. For notched impact, products sold as toughened are shown but kept out of the median.
On the H2C
Printing in full- Nozzle
- 280–300 °C
- most products that give one
- Bed
- 70–80 °C
- most products that give one
- Heated chamber
- none needed
- 2 of 4 products
- Drying
- 70–120 °C, 4–12 h
- 2 of 4 products call for it; 2 more give it as optional
- Nozzle type
- hardened
- all 4 products' sheets ask for one
No product's setting is beyond the H2C's limits: nozzle 350 °C, bed 120 °C, heated chamber 65 °C.
Among the materials
Against PET, PET-GF is 84 % stiffer and 21 % stronger flat. Against PET-CF, PET-GF is 38 % less expensive, 19 % less stiff and 8 % stronger across the layers. Among the materials, PET-GF has a high tensile modulus (XY), tensile strength (XY), tensile strength (Z) and density, and a low elongation at break (XY): each is in the top or bottom quarter of the materials that publish it. The rest of its key properties sit in the middle half.
PET-GF is tougher in notched Charpy than PET, PET-CF and ASA-CF but costs less than PET, PET-CF and PA12-CF and others
How does it compare with what an engineer would buy instead?
- PET-GF: its products' median and middle half
- an alternative
- lowest to highest
- each material's median (top row)
Each row is a material, each column a property: the bar is the middle half of a material's products, the tick their median, the hairline their lowest to highest; the ticks above the rows are every material's median.
The figure as a table
| Material | Modulus (XY) (GPa) | Strength (XY) (MPa) | Strength (Z) (MPa) | Notched Charpy (kJ/m²) | HDT 0.45 MPa (°C) | Price (CAD/kg) |
|---|---|---|---|---|---|---|
| PET-GF (this material) | 4.13 · 3 | 70.9 (68.1–72.3) · 4 | 34 · 3 | 6.56 · 1 | 120 · 3 | 69 · 2 |
| PET | 2.25 · 2 | 58.4 · 2 | — | 1.2 · 1 | 89 · 1 | 115 · 1 |
| PET-CF | 5.11 (4.45–6.36) · 4 | 70 (60.7–74.3) · 4 | 31.4 · 2 | 5.4 · 3 | 124 (90–149) · 6 | 113 · 3 |
| ASA-CF | 3.91 (2.35–4.43) · 6 | 39.1 (39–45.8) · 7 | 27.5 (23–30.3) · 4 | 5.76 · 3 | 101 (97–103) · 5 | 65 (54–120) · 5 |
| PA12-CF | 3.31 (1.97–8) · 5 | 65 (48.5–79.5) · 8 | 33.1 · 2 | 16.3 (13.7–17.8) · 4 | 131 (111–160) · 7 | 300 · 1 |
| PA6-CF | 4.37 (4.09–4.61) · 6 | 70 (62.3–104) · 8 | 48 · 3 | 13.4 · 3 | 193 (185–202) · 6 | 130 (113–160) · 4 |
Each cell is the median of the products ranked, its middle half in brackets, and how many.
Where PET-GF sits among the 128 rigid materials on file
Where is it in the landscape: stiffness against strength, heat resistance against price?
- PET-GF: median, middle half as a cross
- a PET-GF product
- an alternative
- another material
- beyond the scale
Tensile strength (XY) against tensile modulus (XY)
MPa, log scale
Tensile modulus (XY), GPa, log scale
HDT at 0.45 MPa against price
°C
Price, CAD/kg, log scale
Grey points are every other rigid material's medians; the alternatives are named.
The figure as a table
| Material | Tensile modulus (XY) | Tensile strength (XY) | Price | HDT at 0.45 MPa |
|---|---|---|---|---|
| PET-GF (this material) | 4.13 GPa · 3 | 70.9 MPa · 4 | 69 CAD/kg · 2 | 120 °C · 3 |
| PET | 2.25 GPa · 2 | 58.4 MPa · 2 | 115 CAD/kg · 1 | 89 °C · 1 |
| PET-CF | 5.11 GPa · 4 | 70 MPa · 4 | 113 CAD/kg · 3 | 124 °C · 6 |
| ASA-CF | 3.91 GPa · 6 | 39.1 MPa · 7 | 65 CAD/kg · 5 | 101 °C · 5 |
| PA12-CF | 3.31 GPa · 5 | 65 MPa · 8 | 300 CAD/kg · 1 | 131 °C · 7 |
| PA6-CF | 4.37 GPa · 6 | 70 MPa · 8 | 130 CAD/kg · 4 | 193 °C · 6 |
Mechanical properties
Printed flat (XY), PET-GF typically reaches a tensile strength of 70.9 MPa at a modulus of 4.13 GPa, and breaks at 3.28 % elongation. In bending, its flexural strength is typically 115 MPa at a flexural modulus of 3.68 GPa.
PET-GF's products spread most in elongation at break: the middle half runs 2.56–4.38 %
How strong, stiff and tough are its products, and which stand out?
- a product
- measured after annealing
- middle half and median
One mark per product on each property's scale (zoomed where its products sit close together, as its label says); the band is the middle half of the products the median counts, and the line the median.
Hover or select a product to find it in every figure; its name opens its card on the Products page.
The figure as a table
| Property | In the median | Median | Middle half | Lowest in the median | Highest in the median | As published | Added filler or additive |
|---|---|---|---|---|---|---|---|
| Tensile strength (XY) (MPa) | 4 | 70.9 | 68.1–72.3 | Polymaker Fiberon PET-GF15, 59.9 | Flashforge PET-GF, 76 | 0 | 0 |
| Elongation at break (XY) (%) | 4 | 3.28 | 2.56–4.38 | Raise3D Industrial PET GF, 2.56 | Flashforge PET-GF, 5.5 | 0 | 0 |
Every PET-GF product that publishes these values is drawn; each value, with its document and conditions, is on the Products page.
| As each sheet publishes it | Flashforge PET-GF | Polymaker Fiberon PET-GF15 | Raise3D Industrial PET | QIDI PET-GF |
|---|---|---|---|---|
| Tensile modulus (XY) | not published | 4.14 GPaafter annealing | 4.13 GPaafter annealing | 4.13 GPaafter annealing |
| Tensile strength (Z) | not published | 48.2 MPaafter annealing | 34 MPaafter annealing | 34 MPaafter annealing |
| Notched Charpy impact | not published | 8.7 kJ/m²after annealing | not published | 6.56 kJ/m²after annealing |
Across the layers (Z), PET-GF keeps 48 % of its flat strength and 80 % of its flat stiffness
What does a printed part lose across the layers (Z) against flat (XY), and is that usual?
- a product
- measured after annealing
- equal share: 100, 75, 50 and 25 %
- PET-GF's median share
- an alternative
Tensile strength
Z keeps 48 % of XY, median of 3 products
flat (XY), MPa
Share kept: ASA-CF 60 % · PA6-CF 49 % · PET-GF 48 % · PA12-CF 46 % · PET-CF 45 %
Tensile modulus
Z keeps 80 % of XY, median of 3 products
flat (XY), GPa
Share kept: PET-GF 80 % · ASA-CF 56 % · PET-CF 55 % · PA12-CF 55 % · PA6-CF 46 %
Elongation at break
Z keeps 45 % of XY, median of 3 products
flat (XY), %
Share kept: PA12-CF 106 % · ASA-CF 91 % · PA6-CF 77 % · PET-GF 45 % · PET-CF 43 %
Each point is a product that publishes both from one sheet: below the 100 % ray it keeps less across the layers than flat. Under each plot, the median share its alternatives' products keep.
The figure as a table
| Product | Property | Flat (XY) | Across (Z) | Z as a share of XY |
|---|---|---|---|---|
| Polymaker Fiberon PET-GF15 | Tensile strength | 59.9 MPa | 48.2 MPa | 80 % |
| Raise3D Industrial PET GF | Tensile strength | 71 MPa | 34 MPa | 48 % |
| QIDI PET-GF | Tensile strength | 70.9 MPa | 34 MPa | 48 % |
| Polymaker Fiberon PET-GF15 | Tensile modulus | 4.14 GPa | 3.43 GPa | 83 % |
| Raise3D Industrial PET GF | Tensile modulus | 4.13 GPa | 3.32 GPa | 80 % |
| QIDI PET-GF | Tensile modulus | 4.13 GPa | 3.32 GPa | 80 % |
| Polymaker Fiberon PET-GF15 | Elongation at break | 4 % | 2.6 % | 65 % |
| Raise3D Industrial PET GF | Elongation at break | 2.56 % | 1.14 % | 45 % |
| QIDI PET-GF | Elongation at break | 2.56 % | 1.14 % | 45 % |
| PET-CF (alternative) | Tensile strength | 45 % · 2 | ||
| ASA-CF (alternative) | Tensile strength | 60 % · 4 | ||
| PA12-CF (alternative) | Tensile strength | 46 % · 2 | ||
| PA6-CF (alternative) | Tensile strength | 49 % · 3 | ||
| PET-CF (alternative) | Tensile modulus | 55 % · 2 | ||
| ASA-CF (alternative) | Tensile modulus | 56 % · 4 | ||
| PA12-CF (alternative) | Tensile modulus | 55 % · 1 | ||
| PA6-CF (alternative) | Tensile modulus | 46 % · 2 | ||
| PET-CF (alternative) | Elongation at break | 43 % · 2 | ||
| ASA-CF (alternative) | Elongation at break | 91 % · 3 | ||
| PA12-CF (alternative) | Elongation at break | 106 % · 2 | ||
| PA6-CF (alternative) | Elongation at break | 77 % · 2 |
Flat and across the layers, property by property
Flat and across the layers
| Property | Printed flat (XY) | Across the layers (Z) | Z as a share of XY | ||
|---|---|---|---|---|---|
| Median | Products | Median | Products | ||
| Tensile strength MPa | 70.968.1–72.3 | 4 | 34 | 3 | 48 %3 products |
| Tensile modulus GPa | 4.13 | 3 | 3.32 | 3 | 80 %3 products |
| Elongation at break % | 3.282.56–4.38 | 4 | 1.14 | 3 | 45 %3 products |
| Flexural strength MPa | 115112–119 | 4 | 80.3 | 1 | 77 %1 product |
| Flexural modulus GPa | 3.683.65–3.9 | 4 | 3 | 1 | 81 %1 product |
The middle half of the products under each median. The share is each product's Z value as a part of its XY value, from one sheet and one state, and the median of those shares. How XY and Z differ.
Thermal properties
Its products put HDT at 81.6–120 °C under 0.45 MPa and 71.8–99 °C under 1.8 MPa, against a glass transition of 60 °C. As published, Vicat softening is 233 °C, from one product and melting typically 241 °C.
| As each sheet publishes it | Flashforge PET-GF | Polymaker Fiberon PET-GF15 | Raise3D Industrial PET | QIDI PET-GF |
|---|---|---|---|---|
| HDT at 0.45 MPa | not published | 82 °C | 120 °Cafter annealing | 120 °Cafter annealing |
| HDT at 1.8 MPa | not published | 72 °C | 99 °Cafter annealing | 99 °Cafter annealing |
| Glass transition (Tg) | not published | 60 °C | not published | not published |
Printing on the H2C
PET-GF prints within the H2C's limits and softens near 120 °C, above its 65 °C chamber
What does printing it on the H2C take, and how hot can a part get?
- share of the products that accept each temperature
- what most products accept
- the H2C's limit, and beyond it
- a product
- PET-GF: its products' median and middle half
- as published, under each sheet's own test
Printing it on the H2C
In service
°C
One temperature axis for the settings a print needs and the temperatures a part meets. A setting's shade is how many of the products whose sheets give a window accept each degree; the H2C's limit closes its row.
The figure as a table
| Setting or property | Most products, or the median | Products | H2C limit |
|---|---|---|---|
| Nozzle | 280–300 °C | 4 | 350 °C |
| Bed | 70–80 °C | 4 | 120 °C |
| Heated chamber | 25–50 °C | 1 | 65 °C |
| Drying | 70–120 °C, 4–12 h | 4 | — |
| Glass transition (Tg) | 60 °C | 1 | — |
| HDT at 1.8 MPa | 99 °C | 3 | — |
| HDT at 0.45 MPa | 120 °C | 3 | — |
| Vicat softening temperature | 233 °C | 1 | — |
| Melting temperature | 232–251 °C | 2 | — |
Windows read from the Bambu Lab Filament Guide are not shaded: the guide speaks for every product that reads it.
| Setting | Flashforge PET-GF | Polymaker Fiberon PET-GF15 | Raise3D Industrial PET | QIDI PET-GF |
|---|---|---|---|---|
| Nozzle | 260–280 °C | 280–310 °C | 280–300 °C | 280–320 °C |
| Bed | 70–100 °C | 70–80 °C | 80–100 °C | 60–80 °C |
| Heated chamber | 25–50 °C | none needed | not published | none needed |
| Drying | optional: 90–100 °C for ≥ 12 h | 100 °C for 10 h | 70–80 °C for 8–12 h | optional: 100–120 °C for 4–6 h |
| Nozzle type | hardened | hardened | hardened | hardened |
After printing
Three products publish values measured after annealing, on schedules from 100 °C for 8 h to 120 °C for 16 h.
It is recommended to use Fiberon™ PET-GF15 directly without annealing in cases where temperature resistance of PET-GF15 above 80°C is not required.
Polymaker Fiberon PET-GF15, data sheet, p. 1After printing, it is recommended to anneal the printed model in an oven at 80-100°C for 8-12 hours.
Raise3D Industrial PET GF, maker's product page or guide, p. 1After the printing, the printed part can be annealed to further improve the strength of QIDI PET-GF print part.
QIDI PET-GF, data sheet, p. 5
What makers say about printing it
Printing advice
After the printing process, it is recommended to dry the model in the oven at 120-130°C for 6-8 hours to increase the strength of the model.
Flashforge PET-GF, data sheet, p. 3
Nozzle wear
Nozzle & Gear Material Hardened steel
Flashforge PET-GF, data sheet, p. 2
More from makers: supports and removal, warping and shrinkage, moisture sensitivity and odour and emissions
Supports and removal
If PET GF is used as the support material for itself, please remove the support structure after annealing.
Raise3D Industrial PET GF, data sheet, p. 2
Warping and shrinkage
For thin-walled areas with a wall thickness of less than 4mm, you can try to add reinforcing ribs or increase the wall thickness to avoid possible annealing deformation.
Polymaker Fiberon PET-GF15, data sheet, p. 1
Moisture sensitivity
Fiberon™ PET-GF15 is sensitive to moisture and should always be stored and used under dry conditions (relative humidity below 20%).
Polymaker Fiberon PET-GF15, data sheet, p. 1
Odour and emissions
Odor / Almost odorless
Raise3D Industrial PET GF, data sheet, p. 1
Products
4 products, one from each of 4 makers.
Uses, limitations and chemicals
What it is sold for
Ideal for functional prototypes, jigs, fixtures, automotive parts, brackets, and enclosures.
Polymaker Fiberon PET-GF15, maker's product page or guide, p. 1An ideal choice with multi-colour for reliable printing of fibreglass composites for strong and cost-effective end-use applications.
Raise3D Industrial PET GF, maker's product page or guide, p. 1
Finish and accuracy
The color of the printing parts will become slightly lighter after annealing due to the change in crystallinity, which is a normal phenomenon.
Polymaker Fiberon PET-GF15, data sheet, p. 1In addition, PET GF provides multiple color choices.
Raise3D Industrial PET GF, maker's product page or guide, p. 1
Chemicals and environment
Where no maker of these products speaks to an exposure, reference data for plain PET resin is shown. Fillers, pigments and printing change it, so it does not stand for these products.
| PET resin | Verdict | Agents |
|---|---|---|
| Acid resistance | resistant | Hydrochloric Acid (10%) (resistant) and Sulfuric Acid (10%) (resistant) |
| Alkali resistance | not resistant | Sodium Hydroxide (10%) (not resistant) and Ammonium Hydroxide (10%) (limited) |
| Organic solvent resistance | limited | Acetone (limited), Ethanol (resistant), Toluene (resistant) and Methylene Chloride (not resistant) |
| Oil and grease resistance | resistant | Unleaded Gasoline (resistant), Diesel Fuel (resistant) and Ford Motor Oil (resistant) |
| Hydrolytic stability | not resistant | Hot water (not resistant) |
| UV and outdoor | resistant | Outdoor weathering (carbon arc X-W Weather-Ometer, Florida and Arizona exposure) (resistant) |
Density and price
PET-GF's density is typically 1,390 kg/m³, the middle half 1,380–1,400 kg/m³, across 4 products. PET-GF typically costs 69 CAD/kg, across the 2 products with a regular price in the sample; the lowest is Polymaker Fiberon PET-GF15 at 41 CAD/kg.
| As each sheet publishes it | Flashforge PET-GF | Polymaker Fiberon PET-GF15 | Raise3D Industrial PET | QIDI PET-GF |
|---|---|---|---|---|
| Price | not published | 41 CAD/kg | 98 CAD/kg | not published |
Regular prices, never sale prices, from 9 Canadian shops and 10 foreign shops, sampled 10 Sep–20 Oct 2026, not live; shipping and tax are not included.
Other properties, as published
7 more properties are published, each under its own sheet's test conditions, so they are listed, not ranked.
The 7 properties, lowest to highest
| Property | Products | Lowest–highest |
|---|---|---|
| Fibre content | 4 | 15 % |
| Melt mass-flow rate | 4 | 3–36.9 g/10 min |
| Water absorption | 4 | 0.05–0.5 % |
| Continuous service temperature | 1 | 120 °C |
| Crystallization temperature | 1 | 201 °C |
| Decomposition temperature | 1 | 423 °C |
| Surface resistivity | 1 | 1 × 10¹² Ω |
Sources
11 documents from 5 publishers (5 data sheets, 5 makers' product pages and guides and 1 printer document), read 10 Sep–5 Oct 2026. Each value on PET-GF's Products page names its document and page, and links to the original.
Bambu Lab, H2C Filamant Printing Guide (the H2C's printer guide): print settings for 4 products.
Every document (11), by publisher
| Publisher | Documents | Values | Products |
|---|---|---|---|
| Polymaker | 4 | 31 | 1 |
| QIDI | 2 | 17 | 1 |
| Raise3D | 2 | 16 | 1 |
| Flashforge | 2 | 14 | 1 |
- Bambu Lab, H2C Filamant Printing Guide | Bambu Lab Wiki
- Flashforge, Flashforge PET-GF Filament
- Flashforge, Technical Data Sheet PET-GF Filament
- Polymaker, FIBERON PET GF15
- Polymaker, Fiberon PET-GF15 official maker product page
- Polymaker, Fiberon PET-GF15 Technical Data Sheet
- Polymaker, Fiberon™ PET-GF15
- QIDI, QIDI Filament Guide | Choose the Right Filament
- QIDI, Technical Data Sheet QIDI PET-GF
- Raise3D, PET GF
- Raise3D, Raise3D Industrial PET GF Technical Data Sheet