| About |
|---|
| PLEXIMID® TT70 is a highly heat distortion-resistant poly(n-methyl methacrylimide) (PMMI). Besides showing the properties common to all PLEXIMID® molding compounds, such as excellent transmission and clarity, very high mechanical strength and rigidity, good weather resistance. PLEXIMID® TT70 has the following specific characteristics: high stability of the optical characteristics at long-lasting thermal load, highest heat deflection temperature under load. Application: PLEXIMID® molding compound is particularly suitable for injection molding of items meant for applications that involve maximum thermal loads. Examples: lenses, light guides, lighting fixtures, covers.&& |
| Product Description | |
|---|---|
| Supplier | Evonik |
| Generic | PMMI |
| Material Status | Commercial: Active |
| Features | Good Rigidity,Weather resistance is good,Good Clarity,Optical performance,High Heat Resistance,Heat Stabilized |
| Availabilitys | Europe |
| Process Methods | Injection Molding |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.21 | g/cm³ | ISO 1183 |
| Melt Flow Rate | |||
| 260℃，10.0kg | 1.7 | g/10min | ISO 1133 |
| Water absorption rate | |||
| 23℃，24hr | 6.0 | % | ISO 62 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Tensile modulus | 4000 | MPa | ISO 527-1-2 |
| tensile strength | |||
| fracture | 80.0 | MPa | ISO 527-2/5 |
| Tensile strain | |||
| fracture | 3.0 | % | ISO 527-2/5 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Charpy Unnotch Impact strength | |||
| 23℃ | 20 | kJ/m² | ISO 179/1eU |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 0.45 MPa, unannealed | 158 | ℃ | ISO 75-2/B |
| 1.8 MPa, unannealed | 149 | ℃ | ISO 75-2/A |
| Vicat Softening Temp | |||
| B50 | 170 | ℃ | ISO 306 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | B2 | DIN 4102 |
| optical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Refractive index | 1.540 | ISO 489 | |
| Transmittance | 91.0 | % | ISO 13468-2 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Drying temperature | < 150 | °C | |
| Drying time | 2.0 to 3.0 | hr | |
| Processing (melt) temperature | 260 to 290 | °C | |
| Mold temperature | 130 | °C | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. D65 |
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