An anti-static label covers a range of surface resistance spanning several orders of magnitude, from conductive to barely dissipative. Specifying one only as "anti-static" tells you almost nothing: two products that both carry the word can behave in opposite ways next to a sensitive device. This guide separates the three electrical behaviours, shows how the ranges are defined, and gives a table for matching the label to what it protects.
1. Three behaviours, not one word
- Conductive. Charge moves away almost immediately. Used for grounds, shielding and drain paths.
- Static dissipative. Charge moves away in a controlled time — fast enough to prevent build-up, slow enough not to discharge into the device. This is what most "anti-static" packaging actually means.
- Insulative. Charge stays where it is. Necessary for isolation, and the opposite of what ESD control wants on a surface that will be handled.
The three are defined by surface resistance ranges, and the boundaries are set by the applicable ESD standard rather than by a supplier's preference. Because the dissipative band is wide, "anti-static" on its own is not a specification.
2. Why the range matters more than the word
- Too conductive can be as wrong as too insulative. A conductive surface near an energised circuit creates its own risk; a dissipative one drains charge without shorting anything.
- The device sets the target. A bare sensitive component and a finished appliance have very different tolerance for a discharge event.
- The label is part of a system. It sits on a board, a bag, a tray or a bench, and its behaviour has to match the rest of the ESD control programme rather than stand alone. A label bought on its own rating, without the surface it will sit on, is only half a specification.
3. Choosing by what you are protecting
| What it goes on | Behaviour needed | Surface resistance order | Material direction | Note |
|---|---|---|---|---|
| Bare sensitive device | dissipative | mid-dissipative band | dissipative film with a dissipative adhesive | the adhesive must match the facestock |
| Assembled board or IC | dissipative | dissipative band | dissipative film | avoid metal-backed labels near live circuits |
| Finished appliance | often none, or insulative | insulative | standard film or paper | ESD control usually ends once the unit is enclosed |
| Returnable tote or tray | dissipative or conductive | dissipative to conductive | dissipative film, or a conductive carrier | the tote's own rating sets the requirement |
| Workbench or mat | dissipative | dissipative band | dissipative surface, grounded | resistance to ground matters, not only surface resistance |
Exact thresholds vary between standards and are quoted as ranges rather than single figures. Give the device sensitivity and the ESD programme you are working to, and the band can be narrowed. Where the requirement is the opposite — isolation rather than dissipation — the construction changes completely: the insulation end of the same functional labels group is specified on electrical strength instead. PI film appears in both discussions for different reasons: PI film labels are chosen there for temperature and dimensional stability, not for their electrical behaviour.
4. Where anti-static specifications go wrong
- Specifying the facestock and forgetting the adhesive. A dissipative film on an insulative adhesive gives an insulative label. The adhesive is usually the layer in contact with the surface that matters.
- Assuming anti-static means conductive. The two sit in different bands and serve different purposes.
- Ignoring the print. A conductive or dissipative ink changes the label's behaviour, and a large printed area can dominate it.
- Forgetting humidity. Many dissipative materials depend on moisture for their performance, and a dry warehouse can move a label out of its band.
FAQ
What does "anti-static" actually mean on a label?
Usually that the material is static dissipative — it drains charge in a controlled time rather than blocking it or dumping it. Ask for the surface resistance range, not the word.
Is a conductive label better than a dissipative one?
Not in general. Conductive is right for grounding and shielding; dissipative is right for surfaces near sensitive devices. The application decides.
Does the adhesive affect ESD performance?
It can dominate it. If the facestock is dissipative but the adhesive is not, the assembled label may not perform as specified.
How is the performance measured?
By surface resistance, and sometimes by resistance to a ground point. Both are measured under defined humidity, which is why the test conditions belong in the specification.
Browse the range
Start from the wider functional labels group covering waterproof, cold-resistant, flame-retardant and anti-counterfeit options. Where the pack is also being specified for its environmental profile, the eco labels overview covers the material side. Send the device sensitivity and the ESD programme you work to, and a construction can be matched before samples are issued.