GPPS Zhenjiang Chimei PG‑33
GPPS Zhenjiang Chimei PG‑33
Material Introduction: GPPS Zhenjiang Chimei PG‑33 is a highly versatile general‑purpose polystyrene plastic. It is widely adopted for its high transparency, brilliant surface gloss, environmental‑friendly property, good rigidity and easy‑processing performance.
Main Applications
Transparent food containers, lamp housings, daily‑use articles, toys, stationery, cosmetic containers, indoor and outdoor decorations, etc.
Physical Properties
| Performance Category | Test Item | Test Standard | Unit | Typical Value / Range |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D792 | g/cm³ | 1.05 |
| Melt Flow Rate (MFR) | ASTM D1238 (200°C/5.0kg) | g/10min | 8.0 | |
| Mechanical Properties | Tensile Strength (Yield) | ISO 527‑2/50 | MPa | 41.0 |
| Tensile Strength (Break) | ASTM D638 | MPa | 45.0‑45.1 | |
| Elongation at Break | ASTM D638 | % | 2.0 | |
| Flexural Strength | ASTM D790 | MPa | 65.6‑65.7 | |
| Flexural Modulus | ASTM D790 | MPa | 3030‑3040 | |
| Izod Notched Impact Strength (23°C) | ASTM D256 | J/m | 17 | |
| Rockwell Hardness (M Scale) | ASTM D785 | ‑ | 77 | |
| Thermal Properties | Heat‑Distortion Temperature (HDT, 1.8 MPa, unannealed) | ASTM D648 | °C | 79.0 |
| Heat‑Distortion Temperature (HDT, 1.8 MPa, annealed) | ASTM D648 | °C | 87.0 | |
| Vicat Softening Temperature | ASTM D1525 | °C | 94.0 | |
| Optical Properties | Appearance | ‑ | ‑ | Highly transparent |
| Flame‑Retardant Properties | UL94 Flammability Rating (1.5mm) | UL94 | ‑ | HB |
| Safety Certifications | RoHS Compliance | ‑ | ‑ | Compliant |
Injection Molding Parameters
| Process Parameter | Reference Range / Recommendation | Remarks & Descriptions |
|---|---|---|
| Drying Treatment | 80°C for 2‑3 hours | Although PS features low moisture absorption, drying is recommended when recycled materials are used, under high‑humidity environment or abnormal storage conditions. |
| Barrel Temperature | Feed section: 150‑170°C Compression section: 175‑195°C Nozzle: 185‑205°C | |
| Mold Temperature | 40‑70°C | Adjustable according to product wall thickness, dimension, gate and runner system. |
| Melt Temperature | ‑ | Polystyrene has a broad melting‑temperature range and favorable thermal stability. |
| Precautions | ‑ | Prevent resin from contacting dust and impurities; avoid long‑term melt residence inside heating barrel; hot‑runner temperature shall not exceed 230℃. |
Disclaimer: All above data is for reference only.
