3M 1181 Copper Foil with Conductive Adhesive is an insulating electrical conductor that can be used for grounding and EMI shielding in equipment, components, shielded rooms, etc. The product has a 1-ounce deadsoft copper foil backing and a unique electrically conductive pressure-sensitive acrylic adhesive that is available in standard and custom widths and lengths.
3M 1181 Tape consists of a 1‑ounce deadsoft copper foil backing and a conductive pressure‑sensitive acrylic adhesive. It is supplied on a removable liner for easy handling and die‑cutting, and is available in widths from 1/4" to 23" with a standard length of 18 yards.
The tape provides excellent electrical conductivity for grounding and EMI shielding, with typical far‑field shielding effectiveness of 60 dB to 80 dB (30 MHz to 1 GHz). It is solderable, resists oxidation, and passes UL‑recognized flame‑retardancy tests.
| Backing thickness | 1.4 mil (0.04 mm) |
|---|---|
| Total thickness (backing plus adhesive) | 2.6 mil (0.066 mm) |
| Breaking strength | 25 Ib./in (44 N/10mm) |
| Adhesion to steel | 35 oz/in (3.8 N/10mm) |
| Flame retardancy | Pass |
| Shielding effectiveness (far field) | 60 dB to 80 dB (30 MHz to 1 GHz) |
| Available widths | 1/4" to 23" |
| Standard length | 18 yards |
It provides 60 dB to 80 dB shielding effectiveness over the 30 MHz to 1 GHz frequency range.
The copper foil backing is 1.4 mil (0.04 mm) thick.
Yes, it passes the UL‑recognized flame‑retardancy test.
Widths range from 1/4" up to 23".