- ESD ≤ 1012 Ω
- ELS ≤ 106 Ω
ESD– Static Dissipative Acetal Volume resistivity: ≤ 1010 Ω x cm Surface resistivity: ≤ 1012 Ω.
ELS– CARBON BLACK FILLER Volume resistivity: ≤ 101 Ω x cm Surface resistivity: ≤ 104 Ω.
DTM semi-finished products with the additional titles ELS respectively ESD possess a reduced surface resistivity. This property will be applied wherever static charge of plastic components needs to be avoided.
In sensitive applications such as electronics voltages of over 100 volts are already sufficient to irreparably destroy circuits. In fire-hazardous facilities sparkovers may cause fires or even explosions. The surface resistivity of unmodified plastics is over 1012 Ω.
Are used in scopes like:
22
| UNITS | ASTM TEST | HOMOPOLYMER Derlin POM H | COPOLYMER ACETAL POM C | PTFE-FILLED Derlin Af | POM GF20 | |
| Tensile strength | psi | D638 | 10,000 | 9,800 | 6,800 | 8,500 |
| Flexural modulus | psi | D790 | 420,000 | 370,000 | 350,000 | 730,000 |
| Izod impact (notched) | ft-lbs/in of notch | D256 | 1.5 | 1.0 | 0.7 | 0.8 |
| Heat deflection temperature @ 264 psi | °F | D648 | 257 | 230 | 244 | 316 |
| Maximum continuous service temperature in air | °F | 185 | 195 | 185 | 185 | |
| Water absorption (immersion 24 hours) | % | D570 | 0.25 | 0.20 | 0.22 | 0.25 |
| Coefficient of linear thermal expansion | in/in/ °Fx10-5 | D696 | 6.8 | 6.1 | 5.1 | 2.0 - 4.5 |
| Coefficient of friction (dynamic) | 0.20 | 0.21 | 0.12 | 0.35 |
