Introduction of GPPS:polystyrene gpps plastic granules for free sample , is a colorless, odorless, tasteless, shiny, transparent beaded or granular solid. Density is 1.04 to 1.09, transparency is 88% to 92%, refractive index is 1.59 to 1.60. In the stress function, resulting in birefringence, the so-called stress - optical effect. Product of the melting temperature is 150 to 180 ° C, thermal decomposition temperature is 300 ° C, the heat distortion temperature is 70 to 100 ° C, long-term use temperature is 60 ~ 80 °C.
Specifications of GPPS: 1.Good transparency
2.Low residual monomer
3.Mold dimension stability
4.Good heat resistance
5.Easy Processing
| 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 | 7.3 | g/10min |
| Process shrinkage | | ISO 294 | 0.4-0.7 | % |
| Charpy impact strength | 1eU | ISO 179:1993 | 15 | kj/m2 |
| Tensile modulus | 1mm/min | ISO 527 | 3300 | MPa |
| Elongation | 50mm/min | ISO 527 | 3 | % |
| Tensile strength at break | 50mm/min | ISO 527 | 55 | MPa |
| Ball indentation hardness H | 358N/30s | ISO 2039 | 150 | N/mm2 |
| Bending strength | 2mm/min | ISO 178 | 100 | MPa |
| HDT | 1.82MPa | ISO 75-2 | 80 | °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 | B10/oil | ISO 306 | 93 | °C |
| Flame retardance | >1.4mm | UL-Standard 94 | 94HB | Class
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Physical properties of GPPS:
GPPS is colourless, odourless, tasteless and shiny, transparent particles. Qualitative light, cheap, low waterabsorption, good color, good dimensional stability, electrical products, transparent, easy processing.
Applications of GPPS: 1.GPPS can be used for daily necessities, electrical, instrument shell, toys, lamps, household appliances, stationery, cosmetics containers, indoor.
2.Also can be used in outdoor decoration, fruit tray, optical components, such as prism, lens) lens window glass and molding, headlights, telecom accessories, electric frequency capacitor films,
3. Food packaging.