类别：聚合物；热塑性；聚甲醛（POM）
材料说明：®lw90-s2预伴低磨损配方含2%硅M90基聚合物。这个标准的低摩擦，低磨损的产品在许多应用中表现好，包括那些涉及间歇性运动。
低磨损/摩擦，有机硅改性，低速，高负载
物性表：| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Specific Gravity | 1.40 g/cc | 1.40 g/cc | ASTM D792 | ||
| Density | 1.38 g/cc | 0.0499 lb/in³ | ISO 1183 | ||
| Linear Mold Shrinkage, Flow | 0.019 cm/cm | 0.019 in/in | ISO 294-4 | ||
| 0.022 cm/cm | 0.022 in/in | ASTM D955 | |||
| Linear Mold Shrinkage, Transverse | 0.016 cm/cm | 0.016 in/in | ISO 294-4 | ||
| 0.018 cm/cm | 0.018 in/in | ASTM D955 | |||
| Melt Flow | 8.4 g/10 min @Load 2.16 kg, Temperature 190 °C |
8.4 g/10 min @Load 4.76 lb, Temperature 374 °F |
(MVR) cm³/10min; ISO 1133 | ||
| Mechanical Properties | Metric | English | Comments | ||
| Tensile Strength, Yield | 51.0 MPa | 7400 psi | ASTM D638 | ||
| 56.0 MPa | 8120 psi | 50mm/min; ISO 527-2/1A | |||
| Elongation at Yield | 10 % | 10 % | 50mm/min; ISO 527-2/1A | ||
| Tensile Modulus | 2.50 GPa | 363 ksi | 1mm/min; ISO 527-2/1A | ||
| Flexural Modulus | 2.40 GPa | 348 ksi | ISO 178 | ||
| 2.41 GPa @Temperature 22.8 °C |
350 ksi @Temperature 73.0 °F |
ASTM D790 | |||
| Izod Impact, Notched | 0.747 J/cm | 1.40 ft-lb/in | ASTM D256 | ||
| Izod Impact, Notched (ISO) | 5.30 kJ/m² | 2.52 ft-lb/in² | ISO 180/1A | ||
| Charpy Impact, Notched | 0.700 J/cm² | 3.33 ft-lb/in² | ISO 179/1eA | ||
| 0.450 J/cm² @Temperature -30.0 °C |
2.14 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | |||
| Electrical Properties | Metric | English | Comments | ||
| Volume Resistivity | 1.00e+14 ohm-cm | 1.00e+14 ohm-cm | ASTM D257 | ||
| Thermal Properties | Metric | English | Comments | ||
| CTE, linear | 110 µm/m-°C | 61.1 µin/in-°F | ISO 11359-2 | ||
| CTE, linear, Transverse to Flow | 120 µm/m-°C | 66.7 µin/in-°F | ISO 11359-2 | ||
| Melting Point | 165 °C | 329 °F | ASTM D3418 | ||
| 166 °C | 331 °F | 10°C/min; ISO 11357-1,-2,-3 | |||
| Deflection Temperature at 1.8 MPa (264 psi) | 94.0 °C | 201 °F | ISO 75-1, -2 | ||
| 110 °C | 230 °F | ASTM D648 | |||
| Processing Properties | Metric | English | Comments | ||
| Processing Temperature | 80.0 - 120 °C | 176 - 248 °F | Cavity temperature | ||
| Zone 1 | 170 - 180 °C | 338 - 356 °F | |||
| Zone 2 | 180 - 190 °C | 356 - 374 °F | |||
| Zone 3 | 180 - 190 °C | 356 - 374 °F | |||
| Zone 4 | 190 - 200 °C | 374 - 392 °F | |||
| Die Temperature | 190 - 200 °C | 374 - 392 °F | |||
| Melt Temperature | 180 - 200 °C | 356 - 392 °F | |||
| Mold Temperature | 82.2 - 93.3 °C | 180 - 200 °F | generally preferred range, may vary with thickness | ||
| Drying Temperature | 80.0 - 100 °C | 176 - 212 °F | |||
| Dry Time | 3.00 hour | 3.00 hour | |||
| Injection Pressure | 60.0 - 120 MPa | 8700 - 17400 psi | |||
| Hold Pressure | 60.0 - 120 MPa | 8700 - 17400 psi | |||
| Back Pressure | 0.500 MPa | 72.5 psi | |||
| Hot-Working Temperature | 180 - 200 °C | 356 - 392 °F | |||
| De |
|||||
| Injection molding | Yes | ||||
| Injection speed | slow-medium | ||||
| Pellets | Yes | ||||
| Pre-drying | Drying is not normally required with proper storage | ||||
| Processing conditions | ISO 9988-2 |
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