类别：聚合物；热塑性；聚甲醛（POM）；缩醛均聚物，聚四氟乙烯填充
材料说明：ertacetal h-tf是Delrin®AF混合，结合®聚四氟乙烯纤维均匀分散在乙缩醛树脂。多大的力量，是ertacetal h内在保留。由于聚四氟乙烯纤维，柔软的加入而改变的一些性质，比处女缩醛树脂硬越滑。与ertacetal C和H相比，这种材料具有优越的滑动性能。由ertacetal h-tf轴承低摩擦，长期磨损和粘滑的行为基本上是免费的。
特性：机械强度高，硬度高，硬度高，良好的韧性，良好的抗蠕变性能，高冲击强度，即使在低温，非常好的尺寸稳定性（低吸水性），良好的滑动性能和耐磨性良好的切削加工性，良好的电绝缘性和介电性能。
物性表：| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 1.50 g/cc | 0.0542 lb/in³ | ISO 1183-1 |
| Moisture Absorption at Equilibrium | 0.17 % | 0.17 % | 50% RH |
| Water Absorption at Saturation | 0.72 % | 0.72 % | |
| Mechanical Properties | Metric | English | Comments |
| Hardness, Rockwell M | 84 | 84 | ISO 2039-2 |
| Hardness, Shore D | 79 | 79 | |
| Ball Indentation Hardness | 140 MPa | 20300 psi | ISO 2039-1 |
| Tensile Strength | 55.0 MPa | 7980 psi | at Yield; ISO 527-1/-2 |
| Elongation at Break | 10 % | 10 % | ISO 527-1/-2 |
| Tensile Modulus | 3.10 GPa | 450 ksi | ISO 527-1/-2 |
Compressive Strength  |
26.0 MPa @Strain 1 % |
3770 psi @Strain 1 % |
ISO 604 |
| 44.0 MPa @Strain 2 % |
6380 psi @Strain 2 % |
ISO 604 | |
| 77.0 MPa @Strain 5 % |
11200 psi @Strain 5 % |
ISO 604 | |
| K Factor (ISO) | 8.0 µm/km | 8.0 µm/km | |
| Charpy Impact Unnotched | 3.00 J/cm² | 14.3 ft-lb/in² | ISO 179-1/1eU |
| Charpy Impact, Notched | 0.300 J/cm² | 1.43 ft-lb/in² | ISO 179-1/1eA |
| Coefficient of Friction, Dynamic | 0.20 - 0.30 | 0.20 - 0.30 | |
| Limiting Pressure Velocity | 0.160 MPa-m/sec | 4570 psi-ft/min | at 1 m/s unlubricated |
| 0.260 MPa-m/sec | 7420 psi-ft/min | at 0.1 m/s unlubricated | |
| Electrical Properties | Metric | English | Comments |
| Volume Resistivity | >= 1.0e+14 ohm-cm | >= 1.0e+14 ohm-cm | IEC 60093 |
| Surface Resistivity per Square | >= 1.0e+13 ohm | >= 1.0e+13 ohm | IEC 60093 |
| Dielectric Constant | 3.6 @Frequency >=100000 Hz |
3.6 @Frequency >=100000 Hz |
IEC 60250 |
| Dielectric Strength | 20.0 kV/mm | 508 kV/in | |
| Dissipation Factor | 0.0030 @Frequency 100000 Hz |
0.0030 @Frequency 100000 Hz |
IEC 60250 |
| Comparative Tracking Index | 600 V | 600 V | IEC 60112 |
| Thermal Properties | Metric | English | Comments |
| CTE, linear | 120 µm/m-°C @Temperature 23.0 - 100 °C |
66.7 µin/in-°F @Temperature 73.4 - 212 °F |
|
| Thermal Conductivity | 0.310 W/m-K | 2.15 BTU-in/hr-ft²-°F | |
| Melting Point | 180 °C | 356 °F | DSC, 10°C/min.; ISO 11357-1/-3 |
| Maximum Service Temperature, Air | 90.0 °C | 194 °F | Continuous; 20,000 h |
| 105 °C | 221 °F | Continuous; 5,000 h | |
| Deflection Temperature at 1.8 MPa (264 psi) | 100 °C | 212 °F | ISO 75-1/-2 |
| Flammability, UL94 | HB | HB | |
| Compliance Properties | Metric | English | Comments |
| 3A-Dairy | No | No | |
| European Food 1935/2004 | No | No | |
| FDA | No | No | |
| USP Class VI | No | No | |
| Chemical Resistance Properties | Metric | English | Comments |
| Acids, Strong (pH 1-3) | Unacceptable | Unacceptable | |
| Acids, Weak | Limited | Limited | |
| Alcohols | Acceptable | Acceptable | |
| Alkalies, Strong (pH 11-14) | Unacceptable | Unacceptable | |
| Alkalies, Weak | Limited | Limited | |
| Chlorinated Solvents | Limited | Limited | |
| Continuous Sunlight | Limited | Limited | |
| Hot Water / Steam | Limited | Limited | |
| Hydrocarbons - Aliphatic | Acceptable | Acceptable | |
| Hydrocarbons - Aromatic | Acceptable | Acceptable | |
| Inorganic Salt Solutions | Acceptable | Acceptable | |
| Ketones, Esters | Acceptable | Acceptable | |
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