类别：聚合物；热塑性；聚甲醛（POM）
材料说明：特点：®wr25z是2.5名义上的熔体流动速率为基础的乙缩醛共聚物稳定在户外应用提供最大的耐紫外线辐射。特点：®wr25z是一个低流量产品提供改进的韧性。可在黑色。
耐紫外线-汽车和户外应用，提高韧性
物性表：| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Specific Gravity | 1.41 g/cc | 1.41 g/cc | ASTM D792 | ||
| Density | 1.41 g/cc | 0.0509 lb/in³ | ISO 1183 | ||
| Linear Mold Shrinkage, Flow | 0.016 cm/cm | 0.016 in/in | ISO 294-4 | ||
| 0.022 cm/cm | 0.022 in/in | ASTM D955 | |||
| Linear Mold Shrinkage, Transverse | 0.018 cm/cm | 0.018 in/in | ASTM D955 | ||
| 0.018 cm/cm | 0.018 in/in | ISO 294-4 | |||
| Melt Flow | 2.5 g/10 min | 2.5 g/10 min | ASTM D1238 | ||
| 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 | 60.7 MPa | 8800 psi | ASTM D638 | ||
| 61.0 MPa | 8850 psi | 50mm/min; ISO 527-2/1A | |||
| Elongation at Yield | 10 % | 10 % | 50mm/min; ISO 527-2/1A | ||
| Tensile Modulus | 2.60 GPa | 377 ksi | 1mm/min; ISO 527-2/1A | ||
| Flexural Modulus | 2.55 GPa | 370 ksi | ISO 178 | ||
| 2.59 GPa @Temperature 22.8 °C |
375 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) | 6.20 kJ/m² | 2.95 ft-lb/in² | ISO 180/1A | ||
| Charpy Impact, Notched | 0.640 J/cm² | 3.05 ft-lb/in² | ISO 179/1eA | ||
| Thermal Properties | Metric | English | Comments | ||
| CTE, linear | 100 µm/m-°C | 55.6 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 | 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) | 92.0 °C | 198 °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 | ||||
| Pellets | Yes | ||||
| Pre-drying | Drying is not normally required with proper storage | ||||
| Processing conditions | ISO 9988-2 | ||||
| Profile extrusion | Yes | ||||
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