类别：聚合物；热塑性；聚甲醛（POM）；乙缩醛共聚物，矿物填充
材料说明：特点：®mc270-hm是高模量，矿产耦合缩醛共聚物。它利用了一个更高的水平刚度和添加剂在产品成型收缩率和更好的抗翘曲提供显着的改善，比未填充的特点®M270。特点：®mc270—
矿产耦合减少翘曲，高模量，高流动性
物性表：| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Specific Gravity | 1.60 g/cc | 1.60 g/cc | ASTM D792 | ||
| Density | 1.57 g/cc | 0.0567 lb/in³ | ISO 1183 | ||
| Water Absorption | 0.75 % | 0.75 % | ISO 62 | ||
| Moisture Absorption | 0.200 % | 0.200 % | 23°C/50%RH; ISO 62 | ||
| Linear Mold Shrinkage, Flow | 0.015 cm/cm | 0.015 in/in | ASTM D955 | ||
| 0.015 cm/cm | 0.015 in/in | ISO 294-4 | |||
| Linear Mold Shrinkage, Transverse | 0.012 cm/cm | 0.012 in/in | ASTM D955 | ||
| 0.013 cm/cm | 0.013 in/in | ISO 294-4 | |||
| Mechanical Properties | Metric | English | Comments | ||
| Tensile Strength, Yield | 44.1 MPa | 6400 psi | ASTM D638 | ||
| 45.0 MPa | 6530 psi | 50mm/min; ISO 527-2/1A | |||
| Elongation at Yield | 5.0 % | 5.0 % | 50mm/min; ISO 527-2/1A | ||
| Tensile Modulus | 3.75 GPa | 544 ksi | 1mm/min; ISO 527-2/1A | ||
| Flexural Strength | 77.0 MPa | 11200 psi | ISO 178 | ||
| Flexural Modulus | 3.70 GPa | 537 ksi | ISO 178 | ||
| 3.45 GPa @Temperature 22.8 °C |
500 ksi @Temperature 73.0 °F |
ASTM D790 | |||
| Izod Impact, Notched | 0.481 J/cm | 0.900 ft-lb/in | ASTM D256 | ||
| 0.320 J/cm @Temperature -40.0 °C |
0.600 ft-lb/in @Temperature -40.0 °F |
ASTM D256 | |||
| 0.481 J/cm @Temperature 82.2 °C |
0.900 ft-lb/in @Temperature 180 °F |
ASTM D256 | |||
| Izod Impact, Notched (ISO) | 5.30 kJ/m² | 2.52 ft-lb/in² | ISO 180/1A | ||
| Charpy Impact, Notched | 0.480 J/cm² | 2.28 ft-lb/in² | ISO 179/1eA | ||
| 0.350 J/cm² @Temperature -30.0 °C |
1.67 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | |||
| Thermal Properties | Metric | English | Comments | ||
| CTE, linear | 60.0 µm/m-°C | 33.3 µin/in-°F | ISO 11359-2 | ||
| CTE, linear, Transverse to Flow | 90.0 µm/m-°C | 50.0 µin/in-°F | ISO 11359-2 | ||
| Melting Point | 165 °C | 329 °F | 10°C/min; ISO 11357-1,-2,-3 | ||
| 165 °C | 329 °F | ASTM D3418 | |||
| Deflection Temperature at 1.8 MPa (264 psi) | 97.2 °C | 207 °F | ASTM D648 | ||
| 105 °C | 221 °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 | 190 - 200 °C | 374 - 392 °F | |||
| De |
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| Injection molding | Yes | ||||
| Injection speed | slow | ||||
| Pellets | Yes | ||||
| Processing conditions | ISO 9988-2 | ||||
| Special Information | Use slow injection speed and high mold steel temperature | to improve surface appearance |
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