类别：聚合物；热塑性；聚甲醛（POM）
材料说明：Hostaform®共聚级wr140lg黑色是一种特殊的耐候级缩醛共聚物的制定提供良好的流动和低光泽和紫外线稳定性汽车外部应用程序所必需的。
抗紫外线，低光泽，耐候性
物性表：| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Density | 1.33 g/cc | 0.0480 lb/in³ | ISO 1183 | ||
| Linear Mold Shrinkage, Flow | 0.016 cm/cm | 0.016 in/in | ISO 294-4 | ||
| Linear Mold Shrinkage, Transverse | 0.015 cm/cm | 0.015 in/in | ISO 294-4 | ||
| Melt Flow | 13 g/10 min @Load 2.16 kg, Temperature 190 °C |
13 g/10 min @Load 4.76 lb, Temperature 374 °F |
(MVR) cm³/10min; ISO 1133 | ||
| Mechanical Properties | Metric | English | Comments | ||
| Tensile Strength, Yield | 41.0 MPa | 5950 psi | 50mm/min; ISO 527-2/1A | ||
| Elongation at Yield | 10 % | 10 % | 50mm/min; ISO 527-2/1A | ||
| Tensile Modulus | 1.80 GPa | 261 ksi | 1mm/min; ISO 527-2/1A | ||
| Flexural Modulus | 1.85 GPa | 268 ksi | ISO 178 | ||
| Charpy Impact, Notched | 0.360 J/cm² | 1.71 ft-lb/in² | ISO 179/1eA | ||
| 0.360 J/cm² @Temperature -30.0 °C |
1.71 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | |||
| Thermal Properties | Metric | English | Comments | ||
| CTE, linear | 130 µm/m-°C | 72.2 µin/in-°F | ISO 11359-2 | ||
| CTE, linear, Transverse to Flow | 130 µm/m-°C | 72.2 µin/in-°F | ISO 11359-2 | ||
| Melting Point | 165 °C | 329 °F | 10°C/min; ISO 11357-1,-2,-3 | ||
| Deflection Temperature at 1.8 MPa (264 psi) | 80.0 °C | 176 °F | ISO 75-1, -2 | ||
| Processing Properties | Metric | English | Comments | ||
| Processing Temperature | 80.0 - 105 °C | 176 - 221 °F | Cavity temperature | ||
| Zone 1 | 170 - 175 °C | 338 - 347 °F | |||
| Zone 2 | 170 - 180 °C | 338 - 356 °F | |||
| Zone 3 | 175 - 185 °C | 347 - 365 °F | |||
| Zone 4 | 180 - 190 °C | 356 - 374 °F | |||
| Die Temperature | 185 - 195 °C | 365 - 383 °F | |||
| Melt Temperature | 180 - 195 °C | 356 - 383 °F | |||
| Mold Temperature | 82.2 - 93.3 °C | 180 - 200 °F | generally preferred range, may vary with thickness | ||
| Drying Temperature | 100 - 105 °C | 212 - 221 °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 | ||||
| Pre-drying | Predrying is required before processing to ensure a low gloss finish. | ||||
| Processing conditions | ISO 9988-2 | ||||
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