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Ertacetal H-TF
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- Enhanced sliding properties (if compared to POM-H)
- Low friction coefficient
- Better resistance to wear
- Basically free of stick-slip effect
- Dark brown in colour
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Ertacetal is a DELRIN® AF mix. a combination of PTFE fibres evenly distributed in an acetal resin.
This material boasts many intrinsic properties as POM-H. while some other properties are affected by changes resulting from the addition of the PTFE fibres that are softer and thus reduce the material stiffness. but a the same time make it more sliding if compared to virgin acetal resin.
Parts manufactured with ERTACETAL H-TF show a low friction coefficient and enhanced resistance to wear. and they are basically free of the stick-slip effect.
| Properties | ISO standard | Unit of measurement | Value |
| General properties | |||
| Colour | dark brown | ||
| Density (specific weight) | 1183 | g/cm3 | 1.5 |
| Water absorption | 62 | % | 0.18/0.36 |
| Mechanical properties | |||
| Elongation at break* | 527 | % | 10 |
| Tensile strain at yield / at break* | 527 | MPa | -/55 |
| Tensile modulus of elasticity* | 527 | MPa | 3200 |
| Impact strength | 179/1eA | kJ/m2 | 3 |
| (Charpy impact test - notched) | |||
| Ball indentation hardness | 2039-1 | N/mm2 | 140 |
| Rockwell hardness | 2039-2 | -- | M84 |
| Thermal properties | |||
| Melting temperature | 11357-1/-3 | °C | 175 |
| Thermal conductivity at 23 °C | -- | W/mK | 0.31 |
| Coefficient of linear thermal expansion | av. value between 23 °C and 60 °C | m/mk | 105x10-6 |
| Working temperature. continuously 5.000/ 20.000 | -- | °C | 1.1667 |
| Working temperature. for short periods | -- | °C | 150 |
| Min. operating temperature | -- | °C | -20 |
| HB/HB flammability (thickness 3/6 mm) | UL94 | -- | HB/HB |
| Electric properties | |||
| Dielectric strength* | 60243 | kV/mm | 20 |
| Volume resistivity* | 60093 | Ohm/cm | >1014 |
| Surface resistivity* | 60093 | Ohm | >1013 |
| Physiological properties | |||
| Suitable for contact with foodstuffs | 21 CFR (FDA) | -- | NO |
* Values measured on materials in standard balanced weather conditions, i.e. 23 °C and 50% RH.
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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