HIPS Formosa Plastics Ningbo HP‑9450
HIPS Formosa Plastics Ningbo HP‑9450
Material Introduction: HIPS Formosa Plastics Ningbo HP‑9450 is a high‑impact polystyrene plastic. Featuring ultra‑high impact resistance, good mechanical strength, excellent electrical insulation, favorable thermal stability and stable processability, it is widely used in multiple fields.
Main Applications
HP extruded sheets, wire spools, floating balls and packaging materials.
Physical Properties
| Performance Category | Test Item | Reference Test Standard | Unit | Typical Value / Range |
|---|---|---|---|---|
| Physical Properties | Melt Flow Rate (MFR) | ASTM D1238 (200°C/5kg) | g/10min | 2.3‑3.0 |
| Density | ASTM D792 | g/cm³ | 1.04 | |
| Mechanical Properties | Tensile Strength | ASTM D638 | MPa (or kg/cm²) | 24.0‑25.0 (or 240‑250) |
| Flexural Strength | ASTM D790 | MPa (or kg/cm²) | 43.0‑44.0 (or 440‑470) | |
| Flexural Modulus | ASTM D790 | MPa (or kg/cm²) | 2158‑2400 (or 21580‑24000) | |
| Elongation at Break | ASTM D638 | % | 39‑43 | |
| Izod Notched Impact Strength (1/4") | ASTM D256 | J/m (or kg·cm/cm) | 115‑137 (or 11.5‑14.0) | |
| Thermal Properties | Heat‑Distortion Temperature (HDT, 1.8 MPa, annealed) | ASTM D648 | °C | 88‑91 |
| Vicat Softening Temperature (annealed) | ASTM D1525 | °C | 95‑100 | |
| Other Properties | Residual Styrene Monomer | ‑ | ppm max | ≤700 |
| Flammability (UL94) | UL94 | ‑ | HB (1.5mm‑1.7mm) | |
| Mold Shrinkage | ‑ | % | 0.4‑0.7 (typical for HIPS) |
Processing Parameters
| Process Parameter | Reference Range / Recommendation | Remarks & Descriptions |
|---|---|---|
| Drying Treatment | Normally unnecessary; dry at 75°C for 1‑2 h under improper storage conditions | HIPS features low water absorption (<0.05 %); drying is generally not required. Drying is recommended under high‑humidity environment, with regrind material added or abnormal storage. |
| Barrel Temperature | 190‑230°C or 170‑215°C | Reference barrel setting: rear zone 170‑180°C, middle zone 180‑190°C, front zone 190‑200°C, nozzle 200‑215°C. |
| Mold Temperature | 20‑70°C | Higher mold temperature helps reduce internal stress and improve surface quality of finished parts. |
| Injection Pressure | ‑ | Holding pressure is normally 90 % of injection pressure. Sufficient holding pressure, holding time and cooling time are required. |
| Injection Speed | High injection speed recommended | High injection speed is preferred for complex‑shaped or thin‑wall parts. Excessively fast speed causes flash; too slow speed leads to obvious weld lines. Start with medium speed. |
| Back Pressure | ‑ | ‑ |
| Screw Speed | ‑ | ‑ |
Disclaimer: All above data is for reference only.
