High Impact Polystyrene
Introduction
HI-425 is a functional resin made by copolymerization of styrene monomer and PBR. It shows excellent balance between impact-resistance and heat-resistance.
Typical Properties
| Tensile Strength (Kg/cm2 at 23°C) | 260 | ASTM D638 |
| Tensile Elongation (%) | 50 | ASTM D638 |
| Flexural Strength (Kg/cm2 at 23°C) | 300 | ASTM D790 |
| Flexural Modulus (Kg/cm2 at 23°C) | 17000 | ASTM D790 |
| Izod Impact Strength, 6.4mm Notched (Kg.cm/cm) | 9.0 | ASTM D256 |
| Rockwell Hardness, L scale | 60 | ASTM D785 |
| Heat Distortion Temp. (°C at 6.4mm, 18.8Kg/ cm2 Unannealed) | 74 | ASTM D648 |
| Melt flow Index (g/10min at 200°C 5Kg) | 9.0 | ASTM D1238 |
| Molding Shrinkage (%) | 0.3-0.6 | ASTM D755 |
| Specific Gravity | 1.04 | ASTM D792 |
| Flammability (UL94,HB) | HB | ASTM UL94 |
| Water Absorption (%) | 0.05 | ASTM D570 |
| Dielectric Strength (v/mil) | 450 | ASTM D149 |
| Volume Resistivity (Ω-cm) | 1015 | ASTM D257 |
Applications
HI-425 is developed for the production of office supplies, electronic home appliances, toys, kitchen utensils, miscellaneous goods, etc.