类别：聚合物；热塑性；聚甲醛（POM）；乙缩醛共聚物，无筋
材料说明：semitron ESD 225缩醛基静电耗散材料理想的物料搬运作业。这也是安装中使用的硬盘驱动器的制造或处理过程中的硅晶片上的一个很好的选择
表面电阻率：1010 - 1012欧姆/平方米。热性能为107°（225°C），耐磨性好。
物性表：| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 1.33 g/cc | 0.0480 lb/in³ | ISO 1183-1 |
| Moisture Absorption at Equilibrium | 0.80 % | 0.80 % | 50% RH |
| Water Absorption at Saturation | 10 % | 10 % | |
| Mechanical Properties | Metric | English | Comments |
| Hardness, Rockwell R | 106 | 106 | ISO 2039-2 |
| Hardness, Shore D | 75 | 75 | |
| Ball Indentation Hardness | 70.0 MPa | 10200 psi | ISO 2039-1 |
| Tensile Strength | 38.0 MPa | 5510 psi | at Break (NYP); ISO 527-1/-2 |
| Elongation at Break | 15 % | 15 % | ISO 527-1/-2 |
| Tensile Modulus | 1.50 GPa | 218 ksi | ISO 527-1/-2 |
| Flexural Strength | 50.0 MPa | 7250 psi | |
| Compressive Strength | 14.0 MPa @Strain 1 % |
2030 psi @Strain 1 % |
ISO 604 |
| 25.0 MPa @Strain 2 % |
3630 psi @Strain 2 % |
ISO 604 | |
| 38.0 MPa @Strain 5 % |
5510 psi @Strain 5 % |
ISO 604 | |
| 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 |
| Electrical Properties | Metric | English | Comments |
| Volume Resistivity | 1.0e+9 - 1.0e+11 ohm-cm | 1.0e+9 - 1.0e+11 ohm-cm | IEC 60093 |
| Surface Resistivity per Square | 1.0e+9 - 1.0e+11 ohm | 1.0e+9 - 1.0e+11 ohm | IEC 60093 |
| Thermal Properties | Metric | English | Comments |
| CTE, linear | 150 µm/m-°C @Temperature 23.0 - 100 °C |
83.3 µin/in-°F @Temperature 73.4 - 212 °F |
|
| Melting Point | 165 °C | 329 °F | DSC, 10°C/min.; ISO 11357-1/-3 |
| Maximum Service Temperature, Air | 90.0 °C | 194 °F | Continuous |
| Deflection Temperature at 1.8 MPa (264 psi) | 107 °C | 225 °F | ASTM D648 |
| Flammability, UL94 | HB | HB | |
| Oxygen Index | <= 20 % | <= 20 % | ISO 4589-1/-2 |
| 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 | Acceptable | Acceptable | |
| Chlorinated Solvents | Limited | Limited | |
| Conductive / Static Dissipative | Yes | Yes | |
| 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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