DBM
Application guide · ESD
Molded Anti-Static & ESD EPP Foam for Electronics
Sensitive electronics can be damaged by a static discharge you can't even feel. DBM molds static-dissipative (ESD) EPP foam — surface resistance in the 106–109 Ω band — to protect ICs, connectors, sensors and precision modules during handling, transport and storage, combining ESD safety with EPP's structural cushioning in one reusable part.
ESD classification — where EPP sits
Per ANSI/ESD S541 / IEC 61340 classification (surface resistance, Ω):
| Class | Surface resistance | Use |
|---|---|---|
| Conductive | < 104 Ω | Fastest discharge; most sensitive cases |
| Dissipative (anti-static) | 104 – <1011 Ω | Controlled discharge — DBM's ESD EPP at 106–109 Ω sits here |
| Insulative | ≥ 1011 Ω | Not anti-static |
Why molded ESD EPP (not just ESD sheet/film)
The real differentiator isn't the resistance value (that's a common range) — it's that one molded EPP part delivers all of:
- Static dissipation (ESD safety)
- Structural cushioning + shape recovery (protection + positioning)
- Reusable, circulating dunnage
Plain anti-static sheet or sponge can't do this — especially for reusable ESD trays / dunnage. Topical anti-static also fades with time and abrasion; molded-in dissipative grades stay more stable.
What it protects
IC leads, connectors, flexible circuits, optical sensors, PCBs, precision modules, CNC parts and electronic assemblies — preventing ESD damage during handling, transport and storage.
Standards
- ANSI/ESD S541-2019 — packaging materials for ESD-sensitive items (current; the old EIA-541-1988 is withdrawn).
- IEC 61340-5-3 — ESD packaging (international equivalent).
- ASTM D257 — surface/volume resistance test method.
Corresponding resistance test data can be provided on request.
Forms DBM can mold
- Molded ESD EPP support zones, positioning structures, stacking structures
- Custom cavity liners (designed around the part's geometry, load and handling logic)
- Reusable ESD trays / dunnage
FAQ
What surface resistance is "anti-static"?
Static-dissipative is 104–1011 Ω; conductive is < 104 Ω; insulative ≥ 1011 Ω. DBM's ESD EPP sits in the dissipative band at 106–109 Ω.
Does anti-static performance wear off?
Topical (sprayed-on) anti-static can fade over time; molded-in dissipative grades are more durable.
Can ESD foam also cushion the product?
Yes — molded EPP provides ESD safety and structural cushioning in one reusable part.
Which standards apply?
ANSI/ESD S541-2019 and IEC 61340-5-3 (packaging); ASTM D257 (resistance test).
Need ESD-safe foam that also protects against impact and can be reused?
Send your part list and ESD requirement — we'll propose a molded dissipative EPP tray or liner.
Get a quote from DBM →