Technical Specifications
Typical Applications
- Electronics and technical enclosures
- Control cabinet and installation components
- Luminaires, light guides and illuminated signage
- Interior fit-out and display components with fire-safety requirements
- Functional prototypes for safety-relevant assemblies
Material Documents
Material profile
rPETG EN13501-1 FR is a PETG co-polyester based on recycled feedstock whose formulation carries a halogen-free flame-retardant package. In printing it behaves like technical PETG – low warping, good layer adhesion, an open build environment is sufficient – but it comes with documented fire behaviour.
The actual reason to choose this material is not its mechanics but the verifiability of its fire behaviour. Wherever an enclosure sits close to live parts, the question of how it behaves in a fault condition is regularly part of the acceptance process.
What B-s1,d0 per EN 13501-1 means
EN 13501-1 is the European classification for the reaction to fire of construction products. The class consists of three parts:
| Code | Meaning |
|---|---|
| B | Low contribution to fire (second-best class for combustible materials, after A1/A2) |
| s1 | Low smoke emission (s = smoke, scale s1–s3) |
| d0 | No flaming droplets or particles (d = droplets, scale d0–d2) |
s1 and d0 in particular are the practical difference from plain PETG: low smoke emission preserves visibility for escape routes in a fire, and the absence of flaming droplets prevents a fire from being carried downwards by falling material.
Important note on the scope of the classification
The B-s1,d0 rating comes from the manufacturer datasheet and assesses the material. It is not a part-specific classification certificate for a component manufactured by us. The reason lies in the standard itself: EN 13501-1 always classifies a product in its specific end-use application – thickness, substrate, fixing and installation situation all feed into the test per EN 13823 (SBI) and EN ISO 11925-2.
An FDM-printed part differs from this systematically: wall thickness, infill, layer structure and surface geometry are not those of the tested specimen. We therefore report the class as a material property per manufacturer. If your project requires a part-specific classification, testing of the actual component at a notified body is needed – talk to us and we will prepare the part geometry accordingly.
In addition: the datasheet provided by Winkle (issue 09 Oct 2025) is headed for the pellet grade for large-format additive manufacturing (LFAM). The values apply to the same formulation, but filament processing may produce different results.
Documented properties
All values from the manufacturer datasheet (Winkle, issue 09 Oct 2025):
| Property | Value | Standard |
|---|---|---|
| Density | 1.27 g/cm³ | ISO 1183-1 |
| Tensile modulus | 2,244 MPa | ISO 527 |
| Flexural strength | 71.4 MPa | ISO 178 |
| Charpy, unnotched (23 °C) | no break | ISO 179 |
| Charpy, notched (23 °C) | approx. 8 kJ/m² | ISO 179 |
| Heat deflection temperature HDT/A | 64 °C | ISO 75 |
| Heat deflection temperature HDT/B | 71 °C | ISO 75 |
| Vicat softening temperature | 82 °C | ISO 306 |
| Reaction to fire | B-s1,d0 | EN 13501-1 |
A tensile strength is not stated in the datasheet – we deliberately do not publish an estimated value here. Elongation at break appears in the datasheet with two contradictory values (5% and 37%) and is therefore not adopted as a reliable figure.
The temperature trade-off
The flame-retardant package lowers heat resistance: 64 °C HDT/A is below standard PETG (~70–75 °C). This has to be factored into part design.
| Material | Fire behaviour | Heat resistance |
|---|---|---|
| Standard PETG | not classified | ~70–75 °C |
| rPETG EN13501-1 FR | B-s1,d0 (EN 13501-1) | ~64 °C |
| Prusament ASA | UL94 HB | ~98–104 °C |
| Polycarbonate (PC) | UL94 V0 possible, grade-dependent | ~140 °C |
For enclosures operating permanently above 60 °C this material is not the right choice. ASA or PC should be evaluated instead.
Alternative flame-retardant PETG materials
The market for flame-retardant PETG splits into two evidence worlds: EN 13501-1 (European construction-product classification) and UL94 (flammability testing for parts inside equipment). Which one is right depends on your acceptance process – equipment engineering usually asks for UL94, construction and interior fit-out for EN 13501-1.
| Manufacturer | Product | Evidence | Note |
|---|---|---|---|
| Winkle (ES) | rPETG EN13501-1 FR | EN 13501-1 B-s1,d0 | Used by us; recycled feedstock, halogen-free |
| FormFutura (NL) | ReForm rPETG FR | EN 13501-1 B-s1,d0 | Same evidence world, as filament and pellets |
| Fiberlogy (PL) | PET-G V0 | UL94 V0 | Self-extinguishing in < 10 s |
| Spectrum (PL) | PET-G FR V0 | UL94 V0 | Halogen-free; Vicat ~70 °C, manufacturer notes there is no UL listing |
| Filament PM (CZ) | PETG FRJet | UL94 V0 | Czech manufacturing |
If you need a UL94 V0 rating instead of EN 13501-1, we source it per project from this list – please state the required class and the underlying test specification in your enquiry.
Processing notes
The material requires drying: 6–10 hours at 65 °C before processing so that residual moisture stays below 40 ppm. Damp material causes bubbling and reduces layer adhesion – and on a part chosen for its fire behaviour, an intact layer structure matters particularly.
Printing runs at 220–240 °C nozzle and 60–80 °C bed temperature in an open build environment. A steel nozzle is not required; the material is unfilled and therefore not abrasive.