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Unitika UM-8400-20
| Category | Polymer , Thermoplastic , Polyarylate |
| Manufacturer | Unitika |
| Trade Name | |
| Port | Shanghai port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | Unitika UM-8400-20.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
Characteristics: High dimensional accuracy (circularity and planarity) Large warping resistance Low linear expansion coefficientInformation provided by Unitika Ltd.
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 1.43 g/cc | 0.0517 lb/in³ | ASTM D792 |
| Water Absorption | 0.13 % @Thickness 3.17 mm, Time 86400 sec |
0.13 % @Thickness 0.125 in, Time 24.0 hour |
ASTM D570 |
| Linear Mold Shrinkage, Flow | 0.0025 cm/cm @Thickness 3.00 mm |
0.0025 in/in @Thickness 0.118 in |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Rockwell R | 116 | 116 | ASTM D785 |
| Tensile Strength at Break | 73.0 MPa | 10600 psi | ASTM D638 |
| Elongation at Break | 6.5 % | 6.5 % | ASTM D638 |
| Flexural Strength | 120 MPa | 17400 psi | ASTM D790 |
| Flexural Modulus | 4.70 GPa | 682 ksi | ASTM D790 |
| Izod Impact, Notched | 0.440 J/cm @Thickness 3.17 mm |
0.824 ft-lb/in @Thickness 0.125 in |
ASTM D256 |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 28.0 µm/m-°C | 15.6 µin/in-°F | ASTM D696 |
| Deflection Temperature at 1.8 MPa (264 psi) | 98.0 °C | 208 °F | ASTM D648 |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Volume Resistivity | 1.00e+14 ohm-cm | 1.00e+14 ohm-cm | ASTM D257 |
| Dielectric Strength | >= 21.0 kV/mm | >= 533 kV/in | ASTM D149 |
| Processing Properties | Metric | English | Comments |
|---|---|---|---|
| Rear Barrel Temperature | 230 - 250 °C | 446 - 482 °F | |
| Middle Barrel Temperature | 240 - 260 °C | 464 - 500 °F | |
| Front Barrel Temperature | 250 - 270 °C | 482 - 518 °F | |
| Nozzle Temperature | 250 - 270 °C | 482 - 518 °F | |
| Mold Temperature | 70.0 - 90.0 °C | 158 - 194 °F | actual surface temp |
| Drying Temperature | 100 °C | 212 °F | |
| Dry Time | 10.0 - 24.0 hour | 10.0 - 24.0 hour | |
| Back Pressure | 0.490 - 1.47 MPa | 71.1 - 213 psi | gage pressure |
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