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GreenTec Pro works seamlessly with the Prusa MK4S. Excellent dimensional stability and heat resistance—by far the best material I've tested for thermoforming orthodontic models.
GreenTec Pro works seamlessly with the Prusa MK4S. Excellent dimensional stability and heat resistance—by far the best material I've tested for thermoforming orthodontic models.
| Mechanical Properties | Method | Value | Rating |
|---|---|---|---|
| Tensile modulus (Young's modulus) | ISO 527-1 | 4300 MPa | Excellent |
| Tensile strength at yield | ISO 527-1 | 58 MPa | Very Good |
| Tensile stress at break | ISO 527-1 | 53 MPa | Excellent |
| Elongation at break | ISO 527-1 | 3 % | Typical |
| Flexural modulus | ISO 178 | 4200 MPa | Outstanding |
| Flexural strength | ISO 178 | 90 MPa | Very Good |
| Charpy notched impact strength (+23°C) | ISO 179-1eA | 4 kJ/m² | Typical |
| Charpy notched impact strength (-30°C) | ISO 179-1eA | 3 kJ/m² | Typical |
| Charpy unnotched impact strength (+23°C) | ISO 179-1eU | 71 kJ/m² | Very Good |
| Charpy unnotched impact strength (-30°C) | ISO 179-1eU | 55 kJ/m² | Very Good |
| Thermal Properties | Method | Value | Rating |
|---|---|---|---|
| Heat deflection temp. (HDT/B) — 0.45 MPa | ISO 75-1 | 115 °C | Very Good |
| Heat deflection temp. (HDT/A) — 1.8 MPa | ISO 75-1 | 70 °C | Typical |
| Vicat softening temp. (VST/B50) | ISO 306 | 160 °C | Outstanding |
| Melting point (Tm) | ISO 3146-C | 175 °C | Typical |
| Glass transition temp. (Tg) | ISO 11357-1 (DSC) | 60 °C | Typical |
| Melt flow rate (MFR) — 210°C/2.16 kg | ISO 1133-1 (210°C/2.16 kg) | 9 g/10 min | Typical |
| Melt volume rate (MVR) — 235°C/5.0 kg | - | 35 cm³/10 min | Outstanding |
| Thermal decomposition temp. | - | 240 °C | Typical |
| CLTE — flow direction | - | 0.55 cm/cm/°C | Excellent |
| Physical Properties | Method | Value | Rating |
|---|---|---|---|
| Density | ISO 1183-1 | 1.3 g/cm³ | - |
| Water absorption (saturation, 23°C) | - | 0.6 % | - |
| Mould shrinkage | ISO 294-4 | 0.3 % | Excellent |
| Special Properties | Method | Value | Rating |
|---|---|---|---|
| UV resistance | - | Limited | - |
| Chemical resistance | - | Moderate | - |