Polystyrene (PS)
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Polystyrene (PS)
Polystyrene is a rigid, transparent plastic with good dimensional stability, commonly used in disposable food packaging and lab equipment. It is cost-effective and easily molded, though it tends to be brittle. Expanded Polystyrene (EPS) is a lightweight foam used for insulation and packaging, while General Purpose Polystyrene (GPPS) is used for clear rigid items.
- Low-cost and lightweight
- Excellent clarity and rigidity
- Easy to mold and process
- Available in foam and solid forms
• Disposable cutlery and food containers
• CD/DVD cases
• Insulated packaging (EPS)
• Labware and test tubes
Product Property & Details
| Property | Details |
|---|---|
| Types Available: | General Purpose (GPPS), High Impact (HIPS) |
| Density: | 1.04 – 1.06 g/cm³ |
| Hardness: | Shore D: 75 – 85 |
| Impact Strength: | Low to Moderate (Notched Izod: 0.3 – 1.0 ft-lb/in) |
| Thermal Conductivity: | 0.12 – 0.14 W/m·K |
| Coefficient of Thermal Expansion: | 70 – 120 ×10⁻⁶ /°C |
| Glass Transition Temperature: | 100°C |
| Melting Point: | 240°C (softens much earlier) |
| Dielectric Strength: | 20 – 30 kV/mm |
| Flammability Rating: | UL 94 HB |
| UV Resistance: | Poor |
| Weatherability: | Poor |
| Moisture Absorption: | ~0.03% |
| Creep Resistance: | Moderate |
| Chemical Resistance: | Poor to moderate; dissolves in many solvents |