中心质体centrodal GF 广发聚甲醛30%玻璃纤维
类别：聚合物；热塑性；聚甲醛（POM）；共聚甲醛，30%玻璃纤维增强
材料说明：该材料具有良好的热性能和抗滑性能。其应用包括海豹，刮板链的导游，和齿轮和滚筒。 物性表：
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 1.60 g/cc | 0.0578 lb/in³ | ISO 1183 |
| Moisture Absorption at Equilibrium | 0.17 % | 0.17 % | in normal climate 23°C/50%RH; ISO 62 |
| Water Absorption at Saturation | 0.90 % | 0.90 % | in water at 23°C; ISO 62 |
| Mechanical Properties | Metric | English | Comments |
| Ball Indentation Hardness | 200 MPa | 29000 psi | value at 30 sec.; ISO 2039-1 |
| Tensile Strength, Yield | 135 MPa | 19600 psi | v = 50 mm/min; ISO 527-2 |
| Elongation at Break | 4.0 % | 4.0 % | ISO 527-2 |
| Tensile Modulus | 9.20 GPa | 1330 ksi | ISO 527-2 |
| Flexural Modulus | 7.80 GPa | 1130 ksi | ISO 178 |
| Charpy Impact Unnotched | 3.00 J/cm² | 14.3 ft-lb/in² | ISO 179/1eU |
| Charpy Impact, Notched | 0.800 J/cm² | 3.81 ft-lb/in² | ISO 179/1eA |
| Electrical Properties | Metric | English | Comments |
| Electrical Resistivity | 1.00e+15 ohm-cm | 1.00e+15 ohm-cm | IEC 60093 |
| Surface Resistance | 1.00e+12 ohm | 1.00e+12 ohm | IEC 60093 |
| Dielectric Constant | 4.3 @Frequency 100 Hz |
4.3 @Frequency 100 Hz |
IEC 60250 |
| 4.3 @Frequency 1e+6 Hz |
4.3 @Frequency 1e+6 Hz |
IEC 60250 | |
| Dielectric Strength | 40.0 kV/mm | 1020 kV/in | in transformer oil; IEC 60243-1 |
| Dissipation Factor | 0.0030 @Frequency 100 Hz |
0.0030 @Frequency 100 Hz |
IEC 60250 |
| 0.0060 @Frequency 1e+6 Hz |
0.0060 @Frequency 1e+6 Hz |
IEC 60250 | |
| Thermal Properties | Metric | English | Comments |
| CTE, linear | 40.0 µm/m-°C @Temperature 20.0 °C |
22.2 µin/in-°F @Temperature 68.0 °F |
ISO 11359 |
| Melting Point | 166 °C | 331 °F | 10K/min; ISO 3146 |
| Maximum Service Temperature, Air | 100 °C | 212 °F | Long Term |
| 140 °C | 284 °F | Short term | |
| Deflection Temperature at 1.8 MPa (264 psi) | 160 °C | 320 °F | ISO 75-2 |
| Vicat Softening Point | 158 °C | 316 °F | VST/B/50; ISO 306 |
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