类别：聚合物；热塑性；聚甲醛（POM）；乙缩醛共聚物，无筋
材料说明：天然缩醛共聚物
物性表：| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Specific Gravity | 1.41 g/cc | 1.41 g/cc | ASTM D792 |
| Moisture Absorption at Equilibrium | 0.22 % | 0.22 % | 23°C at 60% RH; ASTM D570 |
| Linear Mold Shrinkage | 0.022 cm/cm | 0.022 in/in | ASTM D955 |
| Melt Flow | 3.0 g/10 min @Load 2.16 kg, Temperature 190 °C |
3.0 g/10 min @Load 4.76 lb, Temperature 374 °F |
Procedure A Condition E; ASTM D1238 |
| Mechanical Properties | Metric | English | Comments |
| Hardness, Rockwell M | 78 | 78 | ASTM D785 |
| Tensile Strength at Break | 60.0 MPa | 8700 psi | ASTM D638 |
| Elongation at Break | 65 % | 65 % | ASTM D638 |
| Flexural Strength | 88.3 MPa | 12800 psi | ASTM D790 |
| Flexural Modulus | 2.569 GPa | 372.6 ksi | ASTM D790 |
| Poissons Ratio | 0.35 | 0.35 | |
| Shear Strength | 55.2 MPa | 8000 psi | ASTM D732 |
| Izod Impact, Notched | 0.694 J/cm | 1.30 ft-lb/in | ASTM D256 |
| Coefficient of Friction | 0.13 | 0.13 | Against Steel; Westover or Radial Type |
| 0.15 | 0.15 | Against Aluminum; Westover or Radial Type | |
| 0.15 | 0.15 | Against Brass; Westover or Radial Type | |
| 0.20 | 0.20 | Against Kepital; Westover or Radial Type | |
| Electrical Properties | Metric | English | Comments |
| Volume Resistivity | 1.00e+14 ohm-cm | 1.00e+14 ohm-cm | ASTM D257 |
| Surface Resistance | 1.00e+16 ohm | 1.00e+16 ohm | ASTM D257 |
| Dielectric Constant | 3.7 @Frequency 100 Hz |
3.7 @Frequency 100 Hz |
ASTM D150 |
| 3.7 @Frequency 1e+7 Hz |
3.7 @Frequency 1e+7 Hz |
ASTM D150 | |
| Dissipation Factor | 0.0010 @Frequency 100 Hz |
0.0010 @Frequency 100 Hz |
ASTM D150 |
| 0.0070 @Frequency 1e+6 Hz |
0.0070 @Frequency 1e+6 Hz |
ASTM D150 | |
| Arc Resistance | >= 200 sec | >= 200 sec | ASTM D495 |
| Thermal Properties | Metric | English | Comments |
| CTE, linear | 130 µm/m-°C @Temperature 20.0 °C |
72.0 µin/in-°F @Temperature 68.0 °F |
ASTM D696 |
| Melting Point | 165 °C | 329 °F | 10°C/min heating; DSC |
| Deflection Temperature at 0.46 MPa (66 psi) | 158 °C | 316 °F | ASTM D648 |
| Deflection Temperature at 1.8 MPa (264 psi) | 110 °C | 230 °F | ASTM D648 |
| Vicat Softening Point | 162 °C | 324 °F | 0.125 inch bar, 1 Kg; ASTM D1525 |
| Flammability, UL94 | HB | HB | 0.00311 in |
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