| About |
|---|
| STYRON™ 421 is a High Impact Polystyrene material. It is available in North America for extrusion or injection molding. Important attributes of STYRON™ 421 are: Flame Rated Clarity Food Contact Acceptable Good Stiffness Heat Resistant Typical applications include: Appliances Electrical/Electronic Applications Food Contact Applications Packaging&& |
| Product Description | |
|---|---|
| Supplier | Trinseo |
| Generic | PS (HIPS) |
| Material Status | Commercial: Active |
| Features | Good Rigidity,Good Clarity,Good liquidity,Food contact compliance,High Heat Resistance,HB |
| Availabilitys | North America |
| Process Methods | Extrusion |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.04 | g/cm³ | ASTM D792 |
| Melt Flow Rate | |||
| 200℃，5.0kg | 3.9 | g/10min | ASTM D1238 |
| Shrinkage rate | |||
| MD | 0.40 to 0.80 | % | ASTM D955 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | ASTM D256 | ||
| 23 ℃, molded | 77 | J/m | ASTM D256 |
| 23 ℃, injection molding | 100 | J/m | ASTM D256 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | ASTM D648 | ||
| 0.45 MPa, unannealed | 92.0 | ℃ | ASTM D648 |
| 1.8 MPa, unannealed | 82.0 | ℃ | ASTM D648 |
| Vicat Softening Temp | 103 | ℃ | ASTM D1525 |
| Linear coefficient of thermal expansion | |||
| MD | 9.0E-5 | 1/℃ | ASTM D696 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | HB | UL 94 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Rockwell hardness | |||
| R-level | 115 | ASTM D785 | |
| Tensile modulus | |||
| injection molding | 2200 | MPa | ASTM D638 |
| tensile strength | ASTM D638 | ||
| Fracture, injection molding | 31.0 | MPa | ASTM D638 |
| injection molding | 34.0 | MPa | ASTM D638 |
| Tensile strain | |||
| Fracture, injection molding | 60 | % | ASTM D638 |
| Bending modulus | |||
| injection molding | 2300 | MPa | ASTM D790 |
| bending strength | |||
| injection molding | 43.0 | MPa | ASTM D790 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Extrusion | Nominal value | Unit | Test method |
| Barrel rear temperature | 218 to 249 | °C | |
| Barrel middle temperature | 218 to 249 | °C | |
| Barrel front temperature | 199 to 213 | °C | |
| Nozzle temperature | 213 to 243 | °C | |
| Mold temperature | 16 to 66 | °C | |
| Barrel 1 zone temperature | 177 to 193 | °C | |
| Barrel 2 zone temperature | 182 to 204 | °C | |
| Barrel 3 zone temperature | 188 to 210 | °C | |
| Barrel 4 zone temperature | 199 to 216 | °C | |
| Barrel 5 zone temperature | 204 to 221 | °C | |
| Connector temperature | 193 to 232 | °C | |
| Melt temperature | 193 to 232 | °C | |
| Nozzle temperature | 199 to 232 | °C | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
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