类别：聚合物；热塑性；聚甲醛（POM）；乙缩醛共聚物，无筋
材料说明：ertacetal C象限的缩醛共聚物等级。下一个标准的自然和黑色的成绩，也有一系列的特殊颜色可供所有显示的食品和食品药品管理局食品接触符合。缩醛共聚物抗水解更耐腐蚀，强碱性和热氧化降解比缩醛均聚物
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 | 1.41 g/cc | 0.0509 lb/in³ | ISO 1183-1 |
| Moisture Absorption at Equilibrium | 0.20 % | 0.20 % | 50% RH |
| Water Absorption at Saturation | 0.80 % | 0.80 % | |
| Outgassing - Total Mass Loss | 0.34 % | 0.34 % | |
| 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 | 66.0 MPa | 9570 psi | at Yield; ISO 527-1/-2 |
| Elongation at Break | 50 % | 50 % | ISO 527-1/-2 |
| Elongation at Yield | 20 % | 20 % | ISO 527-1/-2 |
| Tensile Modulus | 2.80 GPa | 406 ksi | ISO 527-1/-2 |
| Flexural Strength | 91.0 MPa | 13200 psi | |
| Flexural Modulus | 2.66 GPa | 386 ksi | |
Compressive Strength  |
23.0 MPa @Strain 1 % |
3340 psi @Strain 1 % |
ISO 604 |
| 40.0 MPa @Strain 2 % |
5800 psi @Strain 2 % |
ISO 604 | |
| 72.0 MPa @Strain 5 % |
10400 psi @Strain 5 % |
ISO 604 | |
| K Factor (ISO) | 45 µm/km | 45 µm/km | |
| Charpy Impact Unnotched | NB | NB | ISO 179-1/1eU |
| Charpy Impact, Notched | 0.800 J/cm² | 3.81 ft-lb/in² | ISO 179-1/1eA |
| Coefficient of Friction, Dynamic | 0.30 - 0.45 | 0.30 - 0.45 | |
| Limiting Pressure Velocity | 0.100 MPa-m/sec | 2860 psi-ft/min | at 1 m/s unlubricated |
| 0.160 MPa-m/sec | 4570 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 | 3.8 @Frequency >=100000 Hz |
3.8 @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 | 125 µm/m-°C @Temperature 23.0 - 100 °C |
69.4 µin/in-°F @Temperature 73.4 - 212 °F |
|
| Thermal Conductivity | 0.310 W/m-K | 2.15 BTU-in/hr-ft²-°F | |
| Melting Point | 165 °C | 329 °F | DSC, 10°C/min.; ISO 11357-1/-3 |
| Maximum Service Temperature, Air | 100 °C | 212 °F | Continuous; 20,000 h |
| 115 °C | 239 °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 | |
| Oxygen Index | 15 % | 15 % | ISO 4589-1/-2 |
| Compliance Properties | Metric | English | Comments |
| 3A-Dairy | Yes | Yes | Only natural |
| European Food 1935/2004 | Yes | Yes | only natural |
| FDA | Yes | Yes | only natural |
| 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) | Acceptable | Acceptable | |
| Alkalies, Weak | Acceptable | Acceptable | |
| 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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