Written by AZoMSep 4 2001
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Polymer Type |
| Thermoplastic |
Advantages |
| Rigid parts of low weight possible, i.e. for the same rigidity, a foam of half the density of a solid needs only a 25% greater wall thickness. Thick mouldings can be produced without sink marks. Mouldings have low tendency to warp and have low residual stress. |
Disadvantages |
| Not all grades are suitable for food contact or medical applications. High quality finish not producible with low pressure injection systems. Reduced tensile strength, HDT and dielectric strength compared with unmodified polystyrene. |
Typical Properties |
| | | Density (g/cm3) | 0.80 | | Surface Hardness | RM30 | | Tensile Strength (MPa) | 22 | | Flexural Modulus (GPa) | 1.6 | | Notched Izod (kJ/m) | 0.03 | | Linear Expansion (/°C x 10-5) | 10 | | Elongation at Break (%) | 2 | | Strain at Yield (%) | 1.3 | | Max. Operating Temp. (°C) | 50 | | Water Absorption (%) | 0.07 | | Oxygen Index (%) | 18 | | Flammability UL94 | HB | | Volume Resistivity (log ohm.cm) | 16 | | Dielectric Strength (MV/m) | 10 | | Dissipation Factor 1kHz | 0.0005 | | Dielectric Constant 1kHz | 3 | | HDT @ 0.45 MPa (°C) | 80 | | HDT @ 1.80 MPa (°C) | 70 | | Material. Drying hrs @ (°C) | NA | | Melting Temp. Range (°C) | 200 - 250 | | Mould Shrinkage (%) | 0.6 | | Mould Temp. Range (°C) | 20 - 50 | |
Applications |
| Electronic and business machines. Replacement for wood furniture, television cabinets, armchair shells, armrests. Packaging cases. |
| Source : Abstracted from Plascams For more information on Plascams please visit RAPRA Technology Ltd. |