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Semitron® ESd 225 (POM)
Brand: 
- Permanently antistatic
- Static charge dissipation (5 kV) in less than 2 seconds
- Metal- and graphite/coal dust-free
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Polyacetal, antistatic resin, forming an ideal solution for applications requiring material handling.
It prevents discharge-related issues that occur in elements intended for human contact.
It is also an excellent choice for installations used to handle silicone wafers throughout the production processes.
Specifications
- Permanently antistatic
- Static charge dissipation (5 kV) in less than 2 seconds
- Metal- and graphite/coal dust-free
| Properties | ISO / (IEC) standard | Unit of measurement | Value |
| General properties | |||
| Colour | beige | ||
| Density | 1183-1 | g/cm3 | 1.33 |
| Water absorption: | |||
| - after 24/96 h immersion in | 62 | mg | 392/705 |
| water at 23 °C | |||
| 62 | % | 5/9 | |
| - at saturation in air of 23 °C / 50% RH | -- | % | 0.8 |
| - at saturation in water of 23 °C | -- | % | 10 |
| Thermal properties | |||
| Melting temperature | 11357-1/-3 | °C | 165 |
| Glass transition temperature | 11357-1/-2 | °C | -- |
| Thermal conductivity at 23 °C | - | W (K.m) | -- |
| Average coefficient of linear thermal expansion: | |||
| - average value between 23 and 100 °C | - | m/(m.K) | 150x10-6 |
| - average value between 23 and 150 °C | - | m/(m.K) | -- |
| - average value above 150 °C | - | m((m.K) | -- |
| Deflection temperature under load: | |||
| - method A: 1.8 MPa | 75-1/-2 | °C | -- |
| Max. operating temperature in air: | |||
| - for short periods | - | °C | 140 |
| - continuously: min. 20.000 h | - | °C | 90 |
| Min. operating temperature | -50 | ||
| Flammability: | |||
| “Oxygen index” | 4589-1/-2 | % | <20 |
| - according to method UL 94 | - | - | HB/HB |
| (1.5/3 mm thickness) | |||
| Mechanical properties at 23 °C | |||
| Tension test | |||
| - Tensile stress at yield / Ultimate tensile strength | 527-1/-2 | MPa | NYP/38 |
| - Tensile strain at break | 527-1/-2 | % | 15 |
| - Tensile modulus of elasticity | 527-1/-2 | MPa | 1500 |
| Compression test | |||
| - Compressive stress at 1% nominal strain | 604 | MPa | 14 |
| - Compressive stress at 2% nominal strain | 604 | MPa | 25 |
| Charpy impact strength - unnotched | 179-1/1eU | kJ/m2 | no break |
| Charpy impact strength - notched | 179-1/1eA | kJ/m2 | 8 |
| Ball indentation hardness | 2039-1 | N/mm2 | 70 |
| Rockwell hardness | 2039-2 | - | R 106 |
| Electrical properties at 23 °C | |||
| Dielectric strength | (60243-1) | kV/mm | -- |
| Volume resistivity | (60093) | Ohm.sq | 109-1011 |
| Surface resistivity | ANSI/ESD | Ohm.sq | 109-1011 |
| STM 1111 | |||
| Relative permittivity: | (60250) | -- | -- |
| at 100 Hz | |||
| at 1 MHz | (60250) | -- | 4.3 |
| Dielectric dissipation factor. tan ‰: | (60250) | -- | -- |
| at 100 Hz | |||
| at 1 MHz | (60250) | -- | 0.036 |
| Comparative Tracking Index | (60112) | -- | -- |
| (CTI) |
Although the information provided in this product data sheet is confirmed by reliable research, POLITECNICA CETAI shall not take any responsibility for the application, processing or use of such information.
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