The document describes the features and characteristics of 3M 1181 Tape, including a 1-ounce deadsoft copper foil backing and a conductive pressure-sensitive acrylic adhesive, as well as its easy handling and diecutting. The product is commonly used for applications requiring excellent electrical conductivity, such as grounding and EMI shielding in equipment, components, shielded rooms, etc.
The 3M 1181 Tape consists of a 1‑ounce dead‑soft copper foil backing with a conductive acrylic pressure‑sensitive adhesive. It is supplied on a removable liner for easy handling and die‑cutting, and is available in standard widths from ¼" to 23" and lengths up to 18 yards or longer on request.
Typical applications include grounding and EMI shielding in equipment, components, and shielded rooms. The copper foil is solderable, resists oxidation, and provides shielding effectiveness of 60 dB to 80 dB (30 MHz‑1 GHz).
| 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/10 mm) |
| Adhesion to steel | 35 oz/in (3.8 N/10 mm) |
| Electrical resistance through adhesive | 0.005 Ω |
| Flame retardancy | Pass |
The typical shielding effectiveness (far field) is in the range of 60 dB to 80 dB (30 MHz to 1 GHz).
The backing thickness is 1.4 mil (0.04 mm).
Yes, it passes the flame‑retardancy test.
The electrical resistance through the adhesive is 0.005 Ω.