Quick3D Choose a material for ESD-safe electronics parts
Static can destroy components without a visible spark. Learn how surface resistivity works and how to pick ESD-safe printed materials.
Trays, fixtures, enclosures and handling tools near circuit boards need to manage static electricity. A discharge you cannot feel can still damage a sensitive component. Ordinary plastics are insulators, so they hold charge. ESD-safe materials let that charge drain away slowly and safely.
Key takeaways
- Ordinary plastics hold charge; ESD-safe materials let it drain away slowly and safely.
- Surface resistivity is the key number, and most ESD handling work wants the dissipative range.
- Carbon-filled ESD grades are the usual choice; standard carbon-fibre filaments are not automatically ESD-safe.
- Measure finished parts at several points, and never use a dissipative part where you need insulation.
What fails
- Charge build-up. An insulating jig rubbed by boards and gloves charges up, then discharges into a component.
- Discharge that is too fast. A fully conductive part touched to a charged board can dump charge too quickly, which can also cause damage.
- Inconsistent parts. Printed ESD materials can vary from part to part and across the surface, depending on print settings.
- Debris. Carbon-filled parts can shed conductive particles if they wear or are machined.
Which properties matter
Surface resistivity is the key number. It tells you how easily charge moves across the surface, in ohms per square. Lower means more conductive.
Definitions vary slightly between standards, but as a rough guide: above about 10¹¹ Ω/sq is insulative, from there down to around 10⁴–10⁵ Ω/sq is static-dissipative, and below that is conductive. Most ESD handling work wants the dissipative range. Check which range your own ESD programme requires.
Watch out
For enclosures that also insulate live circuits, look at dielectric strength. Remember that a dissipative material is not an insulator, so do not use it where you need electrical isolation.
Material families that usually work
- Carbon-filled ESD grades of PETG, ABS, PC, nylon and high-performance polymers. The filler, usually carbon nanotubes or carbon black, creates a conductive path through the plastic.
- ESD resins exist but are fewer, and give finer detail.
- Standard carbon-fibre filaments are not automatically ESD-safe. Chopped fibre for stiffness does not guarantee a controlled resistivity. Only trust a stated ESD value.
Process considerations
We list 22 ESD-safe filaments and 2 ESD-safe resins. FFF dominates here. Print temperature, speed and cooling change how the conductive network forms, so resistivity on your part can differ from the datasheet. Abrasive fillers need a hardened nozzle.
Tip
Treat the datasheet resistivity as a starting point. Check each finished part with a meter at several points before it goes into service.
Carbon-filled ESD filaments are also usually stiffer and less tough than their unfilled base polymer, so check impact strength and elongation at break for clips and snap fits. Unlike topical anti-static sprays, a filled material does not rely on humidity or a surface treatment that wears off, which is why it is preferred for fixtures in daily use.
Design and post-processing tips
- Measure your parts with a surface resistance meter, at several points, before putting them into service.
- Do not paint or coat ESD parts unless the coating is also ESD-rated. An insulating layer defeats the purpose.
- Avoid sanding the outer skin heavily. Resistivity is often different at the surface.
- Ground the part through your workstation, as for any ESD tool.
- Keep the part clean. Oils and residues can change surface behaviour.
A shortlist from our data
We flag 28 materials as ESD-safe. For fixtures near soldering or reflow, heat resistance matters too. These ESD materials have the highest HDT:
| 材料 | 聚合物 | 热变形温度 |
|---|---|---|
| 3DXTECH CarbonX 20% Carbon Fiber PEEK | PEEK | 305 °C |
| LEHVOSS LUVOCOM 3F PEEK CF 9676 | PEEK | 280 °C |
| 3DXTECH 3DXSTAT ESD-Ultem 1010 | PEI | 205 °C |
| LEHVOSS LUVOCOM 3F PAHT CF 9742 | PA6 | 200 °C |
| 3DXTECH 3DXSTAT ESD-PEKK | PEKK | 185 °C |
Common mistakes
- Assuming any black or carbon-filled filament is ESD-safe.
- Choosing fully conductive material when dissipative is required.
- Trusting the datasheet without measuring finished parts.
- Using a dissipative part where you actually need insulation.
See all ESD-safe materials 28 种材料