类别：聚合物；热塑性；聚甲醛（POM）
材料说明：®lw25-s2缩醛共聚物是一种低流量，提高韧性的产品制定一个较低的水平硅减少摩擦，提高耐磨性。
低磨损/摩擦，硅胶，低速，高负载，提高韧性
标准往复式螺杆注塑机以高压缩螺杆（最小3:1优选4:1）和低压力（0.35兆帕/ 50 psi）的青睐。采用低压缩螺杆
物性表：| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Density | 1.38 g/cc | 0.0499 lb/in³ | ISO 1183 | ||
| Melt Flow | 2.1 g/10 min @Load 2.16 kg, Temperature 190 °C |
2.1 g/10 min @Load 4.76 lb, Temperature 374 °F |
(MVR) cm³/10min; ISO 1133 | ||
| Mechanical Properties | Metric | English | Comments | ||
| Tensile Strength, Yield | 54.0 MPa | 7830 psi | 50mm/min; ISO 527-2/1A | ||
| Elongation at Yield | 20 % | 20 % | 50mm/min; ISO 527-2/1A | ||
| Tensile Modulus | 2.35 GPa | 341 ksi | 1mm/min; ISO 527-2/1A | ||
| Flexural Modulus | 2.30 GPa | 334 ksi | ISO 178 | ||
| Izod Impact, Notched (ISO) | 9.00 kJ/m² | 4.28 ft-lb/in² | ISO 180/1A | ||
| Charpy Impact, Notched | 0.900 J/cm² | 4.28 ft-lb/in² | ISO 179/1eA | ||
| Thermal Properties | Metric | English | Comments | ||
| CTE, linear | 110 µm/m-°C | 61.1 µin/in-°F | ISO 11359-2 | ||
| CTE, linear, Transverse to Flow | 110 µm/m-°C | 61.1 µin/in-°F | ISO 11359-2 | ||
| Melting Point | 166 °C | 331 °F | 10°C/min; ISO 11357-1,-2,-3 | ||
| Deflection Temperature at 1.8 MPa (264 psi) | 90.0 °C | 194 °F | ISO 75-1, -2 | ||
| 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 | ||||
| Pellets | Yes | ||||
| Pre-drying | Drying is not normally required with proper storage | ||||
| Processing conditions | ISO 9988-2 | ||||
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