GPPS BASF‑Yangzi 158K
GPPS BASF‑Yangzi 158K
GPPS BASF‑Yangzi 158K is a general‑purpose polystyrene with balanced properties. It is widely applied for its high transparency, high strength, good heat resistance, excellent rigidity and easy‑processing characteristics.
Main Applications
Medical laboratory ware, cosmetic packaging, food containers (e.g. cake trays), CD/DVD cases, transparent injection‑molded parts, extruded sheets, etc.
Property Data
表格
| Property Category | Test Item | Test Standard | Unit | Typical Value / Range |
|---|---|---|---|---|
| Physical Properties | Density | ISO 1183 | g/cm³ | 1.05 |
| Melt Flow Rate (MFR) | ISO 1133 (200 °C / 5 kg) | cm³/10min or g/10min | 3 | |
| Water Absorption | ISO 61 | % | ＜0.1 | |
| Mechanical Properties | Tensile Yield Stress | ISO 527 | MPa | 55 |
| Elongation at Break | ISO 527 | % | 3 | |
| Tensile Modulus | ISO 527 | MPa | 3300 | |
| Flexural Strength | ISO 178 | MPa | 103 | |
| Charpy Un‑notched Impact Strength (23 °C) | ISO 179/1eU | kJ/m² | 17 | |
| Charpy Notched Impact Strength (23 °C) | ISO 179/1eA | kJ/m² | 3 | |
| Rockwell Hardness (Scale L) | ASTM D785 | ‑ | 100 | |
| Thermal Properties | Vicat Softening Temperature (B/50) | ISO 306 (50 N, 50 °C/h) | °C | 101 |
| Heat Deflection Temperature (HDT, 0.45 MPa) | ISO 75 | °C | 98 | |
| Optical Properties | Appearance | ‑ | ‑ | Highly transparent |
| Electrical Properties | Volume Resistivity | IEC 6093 | Ω·cm | ＞10¹⁴ |
| Flammability | UL 94 Rating | UL 94 | ‑ | HB |
| Others | Molding Shrinkage | ‑ | % | 0.3‑0.6 |
Injection Molding Parameters
表格
| Process Parameter | Reference Range / Recommendation | Remarks |
|---|---|---|
| Drying | 60‑80 °C, 2‑3 hours (subject to storage conditions) | PS has low moisture absorption. Drying is recommended if recycled content is present, ambient humidity is high or storage is abnormal. |
| Barrel Temperature | 180‑260 °C | Adjust within range according to part geometry. |
| Mold Temperature | 10‑60 °C | Higher mold temperature improves surface gloss and reduces internal stress. |
| Melt Temperature | ‑ | Polystyrene features a broad melting‑processing window. |
| Injection Pressure | ‑ | Depends on part shape and wall thickness; adjust according to practical conditions. |
Extrusion Process
表格
| Process Parameter | Reference Range / Recommendation | Remarks |
|---|---|---|
| Drying | Pre‑drying or vented vacuum screw is recommended | Even minor moisture may cause defects during extrusion. |
| Processing Temperature | 200‑240 °C |
Note: All data above is for reference only
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