GPPS Formosa Ningbo TAIRIREX GP‑560N
GPPS Formosa Chemicals & Fibre Ningbo GP‑560N
Material Introduction: GPPS Formosa Chemicals & Fibre Ningbo GP‑560N is an optical‑grade polystyrene plastic. It is renowned for high transparency, high heat resistance, good rigidity and excellent extrusion processability.
Main Applications
Television and lighting fixtures, light‑diffusion plates.
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 |
| Density | ASTM D792 | g/cm³ | ‑ (typically ~1.04‑1.05 for GPPS) | |
| Mechanical Properties | Tensile Strength (TS) | ASTM D638 | kg/cm² or MPa | 510 (ASTM, approx. 50 MPa) |
| Flexural Modulus (FM) | ASTM D790 | kg/cm² or MPa | 32000 (ASTM, approx. 3140 MPa) | |
| Izod Notched Impact Strength | ASTM D256 (1/4", 23℃) | kg·cm/cm | 1.8 | |
| Thermal Properties | Heat‑Distortion Temperature (HDT) | ASTM D648 (1.8 MPa, annealed) | °C | ‑ (95 °C for reference, similar to GP‑550N) |
| Vicat Softening Temperature | ASTM D1525 | °C | ‑ (104 °C for reference, similar to GP‑550N) | |
| Optical Properties | Light Transmittance | ‑ | % | Highly transparent (refer to TDS for exact value) |
| Other Properties | Residual Styrene Monomer | ‑ | ppm max | ‑ (≤700 for reference, similar to GP‑550N) |
| Flammability (UL94) | UL94 | ‑ | HB (1.5mm‑1.7mm) |
Extrusion Process 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 (refer to GP‑5500) | Rear zone: 195°C, Middle zone: 210°C, Front zone: 220°C (refer to GP‑5500) |
| Melt Processing Temperature | ‑ | Polystyrene has a broad melting‑temperature range and good thermal stability; it turns into molten state at approx. 190 °C. |
| Mold / Die Temperature | 20‑70°C | Higher temperature helps improve product surface quality. |
| Screw Design | Screw with L/D ≥ 25:1 is recommended | Suitable for extrusion molding to ensure uniform plasticization. |
Disclaimer: All above data is for reference only.
