GPPS Formosa Ningbo TAIRIREX GP535N
GPPS Formosa Chemicals & Fibre Ningbo GP535N
Material Introduction: GPPS Formosa Chemicals & Fibre Ningbo GP535N is a well‑balanced general‑purpose polystyrene plastic. It is widely utilized for its high transparency, good rigidity, favorable flowability, decent heat resistance and easy‑processing performance.
Main Applications
Tableware, lamp shades, crystal boards, toys.
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 | 3.5‑4.5 |
| Density | ASTM D792 | g/cm³ | 1.04 | |
| Mechanical Properties | Tensile Strength | ASTM D638 | MPa | 45 |
| Tensile Modulus | ASTM D638 | MPa | 2744‑3230 | |
| Elongation at Break | ASTM D638 | % | 2 | |
| Flexural Strength | ASTM D790 | MPa | 86‑94 | |
| Flexural Modulus | ASTM D790 | MPa | 3038‑3230 | |
| Izod Notched Impact Strength | ASTM D256 (1/4", 23℃) | kg·cm/cm | 1.7‑1.8 | |
| Thermal Properties | Heat‑Distortion Temperature (HDT) | ASTM D648 (1.8 MPa, annealed) | °C | 89.4‑93 |
| Vicat Softening Temperature | ASTM D1525 | °C | 96‑98.3 | |
| Optical Properties | Light Transmittance | ‑ | % | ≥ 88 (typical value; refer to TDS for exact data) |
| Other Properties | Residual Styrene Monomer | ‑ | ppm max | ≤ 700 |
| Flammability (UL94) | UL94 | ‑ | HB (1.5mm‑1.7mm) |
Injection Molding Parameters
| Process Parameter | Reference Range / Recommendation | Remarks & Descriptions |
|---|---|---|
| Drying Treatment | 75°C for 1‑2 hours | Although PS has low moisture absorption, drying is recommended when recycled materials are used, under high‑humidity environment or abnormal storage conditions. |
| Barrel Temperature | 180‑225°C | Rear zone: 185°C, Middle zone: 205°C, Front zone: 215°C |
| Nozzle Temperature | 205°C | |
| Mold Temperature | 20‑70°C | Higher mold temperature improves product gloss and reduces internal stress. |
| Melt Temperature | 180‑225°C | |
| Injection Pressure | ‑ | Holding pressure is generally 90 % of injection pressure. |
| Injection Speed | Medium to high speed | Excessively fast speed may cause flash; too slow speed leads to obvious weld lines. Medium speed is recommended as starting point. |
Disclaimer: All above data is for reference only.
