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GPPS (General Purpose Polystyrene)
Grade: Injection moulding, extrusion, medical usage
Usage: CD box, drink cup, egg box, extrusion package materials, medical articles, vegetable box in refrigerator.
GPPS
| Item | Test conditions | Test method | Test data | unit |
| Density | ISO 1183:1987 | 1040 | kg/m3 | |
| Water absorption | ISO 62:1999 | <0.1 | % | |
| Melt flow rate | 200°C/5kg | ISO 1133:1997 | 3.8 | cm3/10min |
| Process shrinkage | ISO 294-4:1997 | 0.4-0.6 | % | |
| Charpy impact strength | 1eU | ISO 179:1993 | 15 | kj/m2 |
| Tensile modulus | 1mm/min | ISO 527-2:1993 | 3300 | MPa |
| Elongation | 50mm/min | ISO 527-2:1993 | 3 | % |
| Tensile strength at break | 50mm/min | ISO 527-2:1993 | 55 | MPa |
| Ball indentation hardness H | 358N/30s | ISO 2039-1:1993 | 150 | N/mm2 |
| Bending strength | 2mm/min | ISO 178:1993 | 100 | MPa |
| HDT | 1.8MPa | ISO 75-2:1993 | 84 | °C |
| Linear coefficient of thermal expansion | (23-80)°C | DIN 53 752 | 0.8-1.0 | K-1 |
| Heat conduction | DIN 52 612 | 0.16 | W/mK | |
| Vicat softening point | B50/oil | ISO 306:1994 | 93 | °C |
| Flame retardance | >1.4mm | UL-Standard 94 | 94HB | Class |
