GPPS Formosa Ningbo TAIRIREX GP‑550N
GPPS Formosa Chemicals & Fibre Ningbo GP‑550N
Material Introduction: GPPS Formosa Chemicals & Fibre Ningbo GP‑550N is an optical‑grade polystyrene plastic. It is well‑known for high molecular weight, high transparency, good rigidity, high heat resistance and excellent extrusion performance.
Main Applications
PSP sheets, XPS boards, OPS, pharmaceutical bottles and jars.
Physical Properties
| Performance Category | Test Item | Test Standard | Unit | Typical Value / Range |
|---|---|---|---|---|
| Physical Properties | Melt Flow Rate (MFR) | ASTM D1238 (200°C/5kg) | g/10min | 1.9‑2.3 |
| Density | ASTM D792 / ISO 1183 | g/cm³ | 1.04 | |
| Mechanical Properties | Tensile Strength (TS) | ASTM D638 | MPa | 50‑51 |
| Flexural Modulus (FM) | ASTM D790 | MPa | 3200‑3330 | |
| Flexural Strength | ASTM D790 | MPa | 98.1‑104 | |
| Elongation at Break | ASTM D638 | % | 2 | |
| Izod Notched Impact Strength | ASTM D256 (1/4", 23℃) | kg·cm/cm or J/m | 1.8 or 18 J/m | |
| Thermal Properties | Heat‑Distortion Temperature (HDT) | ASTM D648 (1.8 MPa, annealed) | °C | 95 |
| Vicat Softening Temperature | ASTM D1525 | °C | 104 | |
| Optical Properties | Appearance | ‑ | ‑ | Highly transparent |
| Flame‑Retardant Properties | UL94 Flammability Rating | UL94 | ‑ | HB (1.5 mm) |
| Other Properties | Residual Styrene Monomer | ‑ | ppm max | ≤ 700 |
Extrusion Process Parameters
| Process Parameter | Reference Range / Recommendation | Remarks |
|---|---|---|
| Zone 1 Cylinder Temperature | 160‑180 | °C |
| Zone 3 Cylinder Temperature | 180‑200 | °C |
| Zone 5 Cylinder Temperature | 200‑210 | °C |
| Mold Temperature | 20‑70 | °C |
Injection Molding Parameters
| Process Parameter | Reference Range / Recommendation | Remarks & Descriptions |
|---|---|---|
| Drying Treatment | 75°C for 1‑2 hours | Although PS has low moisture absorption (<0.05 %), drying is recommended when recycled materials are used, under high‑humidity environment or abnormal storage conditions. |
| Barrel Temperature | 190‑230°C (Rear zone: 195°C, Middle zone: 210°C, Front zone: 220°C) | For reference only. |
| Nozzle Temperature | 215°C | |
| Melt Processing Temperature | 190‑230°C | Polystyrene features a broad melting‑temperature range and good thermal stability; it turns into molten state at approx. 190 °C. |
| Mold Temperature | 20‑70°C | Higher mold temperature improves product gloss and reduces internal stress. |
| Injection Speed | Medium |
Disclaimer: All above data is for reference only.
