Polystyrene (PS)
GPPS and HIPS grades.
Polystyrene, in clear rigid GPPS and impact-resistant HIPS grades, is used in disposables, packaging and appliance parts. It processes easily and offers good dimensional stability.
Typical Technical Properties
- Types
- GPPS (crystal), HIPS (high impact), EPS
- Density
- 1.04–1.06 g/cm³
- MFI (200 °C / 5 kg)
- 2 – 30 g/10 min
- Heat deflection temperature
- 75–95 °C
- Packaging
- 25 kg bags, big bags
Values are typical industry ranges; the producer's lot-specific TDS/MSDS is binding.
Applications
- Yoghurt and dessert cups (thermoforming)
- Disposable cups and cutlery
- Refrigerator liners (HIPS)
- CD cases and clear packaging (GPPS)
- Signage and sheet
Frequently Asked Questions
What is the difference between GPPS and HIPS?
GPPS is glass-clear but brittle; HIPS resists impact thanks to rubber modification but is opaque. Choose GPPS for clarity, HIPS for toughness.
Is it suitable for food contact?
Food-grade GPPS and HIPS are available and widely used in applications such as yoghurt cups.
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