PET-CF uses a semi-crystalline PET matrix reinforced with chopped carbon fibre. Unlike PETG-CF, it is engineered for high heat: the reference grade publishes a 205°C HDT while retaining low warpage, high flexural stiffness and only 0.37% saturated moisture uptake.
Material family names are not specifications. This page anchors the discussion to a named commercial grade and published printed-specimen data, then translates that data into practical selection and design guidance.
PET-CF uses a semi-crystalline PET matrix reinforced with chopped carbon fibre. Unlike PETG-CF, it is engineered for high heat: the reference grade publishes a 205°C HDT while retaining low warpage, high flexural stiffness and only 0.37% saturated moisture uptake.
Choose PET-CF for rigid, precise, heat-exposed structures where nylon moisture movement is undesirable.
Orientation, conditioning and geometry can move finished-part performance materially. Use these figures to compare candidate materials—not as guaranteed minimums.
| Property | Representative value | Test / context |
|---|---|---|
| Density | 1.29 g/cm³ | Manufacturer TDS |
| Tensile strength | 74 ± 6 MPa | Manufacturer TDS |
| Elongation at break | 4.5 ± 1.2% | Manufacturer TDS |
| Flexural modulus · XY | 5.32 ± 0.27 GPa | Manufacturer TDS |
| Flexural strength · XY | 131 ± 6 MPa | Manufacturer TDS |
| Impact strength · XY | 36.0 ± 2.7 kJ/m² | Manufacturer TDS |
| HDT · 0.45 MPa | 205°C | ISO 75 |
| Vicat softening | 226°C | ISO 306 |
| Saturated moisture uptake | 0.37% · 25°C / 55% RH | Manufacturer method |
XY values normally represent flat-printed specimens. Z-direction strength can be substantially lower. Final production settings should be qualified on representative geometry.
A useful material choice starts with load case, temperature, environment, duty cycle and failure consequence—not the strongest number on a datasheet.