| About |
|---|
| Plexiglas® MI7 is an impact modified thermoplastic acrylic resin formulated for injection molding and extrusion applications. It is heat resistant, has high melt flow and provides 7 times the impact resistance of standard acrylics while maintaining excellent optical properties. It offers an excellent balance between melt flow and increased resistance to breakage, while providing weatherability superior to that provided by other high-impact plastics. Supplemental moldflow simulation data is available.&& |
| Product Description | |
|---|---|
| Supplier | ROHM |
| Generic | PMMA |
| Material Status | Commercial: Active |
| Features | Weather resistance is good,Good Clarity,Good flexibility,High impact resistance,Good Dimensional Stability,Good liquidity,Low contractility,Good color stability,High Heat Resistance,No BPA,High scratch resistance,Heat Stabilized,HB |
| Availabilitys | North America |
| Process Methods | Extrusion |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.17 | g/cm³ | ASTM D792 |
| Melt Flow Rate | |||
| 230℃，3.80kg | 3.2 | g/10min | ASTM D1238 |
| Shrinkage rate | |||
| MD | 0.30 to 0.60 | % | ASTM D955 |
| Water absorption rate | |||
| 24hr | 0.30 | % | ASTM D570 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | |||
| 23℃ | 32 | J/m | ASTM D256 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, annealed | 85.0 | ℃ | ASTM D648 |
| 0.45 MPa, annealed | 91.1 | ℃ | ASTM D648 |
| Vicat Softening Temp | |||
| — | 98.9 | ℃ | ASTM D1525 3 |
| — | 90.0 | ℃ | ASTM D1525 4 |
| Thermal conductivity coefficient | 0.20 | W/m/K | ASTM C177 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | HB | UL 94 |
| optical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Refractive index | 1.490 | ASTM D542 | |
| Transmittance | |||
| 3180 µm | 91.0 | % | ASTM D1003 |
| Haze | |||
| 3180 µm | < 2.0 | % | ASTM D1003 |
| Supplementary information | Nominal value | Unit | Test method |
|---|---|---|---|
| ASTM Classification | PMMA 0221V3 | ASTM D788 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Tensile modulus | 2520 | MPa | ASTM D638 |
| tensile strength | |||
| fracture | 48.3 | MPa | ASTM D638 |
| Tensile strain | |||
| fracture | 35 | % | ASTM D638 |
| Bending modulus | 2380 | MPa | ASTM D790 |
| bending strength | |||
| yield | 77.2 | MPa | ASTM D790 |
| Rockwell hardness | |||
| M-level | 68 | ASTM D785 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Drying temperature | 82 to 88 | °C | |
| Drying time | 4.0 | hr | |
| Recommended maximum moisture content | 0.10 | % | |
| Recommended injection volume | 50 | % | |
| Proposed maximum recycled material ratio | 20 | % | |
| Barrel rear temperature | 221 | °C | |
| Barrel middle temperature | 227 | °C | |
| Barrel front temperature | 232 | °C | |
| Nozzle temperature | 227 | °C | |
| Processing (melt) temperature | < 271 | °C | |
| Mold temperature | 38 to 88 | °C | |
| Injection speed | Moderate | ||
| Back pressure | 0.689 | MPa | |
| Screw speed | 50 to 100 | rpm | |
| Screw length to diameter ratio | 15.0:1.0 to 20.0:1.0 | ||
| Screw compression ratio | 2.0:1.0 to 2.5:1.0 | ||
| Vent depth | 0.051 | mm | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. Conventional Deflection |
| 3. Annealing cycle: 4hrs @ 176°F |
| 4. Rate A (50°C/h), Loading 1 (10 N) |
| 5. Rate A (50°C/h), Loading 2 (50 N) |
| 6. ND @ 72°F |
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