3M 1181 Service Manual

1181 Tape

Copper Foil with Conductive Adhesive

Data Sheet

Product Description

3M 1181 Tape consists of a 1-ounce
deadsoft copper foil backing and a unique
electrically conductive pressure-sensitive
acrylic adhesive.

• Deadsoft 1-ounce copper foil backing

• Conductive acrylic adhesive

• Supplied on a removable liner for easy
handling and diecutting

Like all 3M shielding tapes, 3M 1181 is
available in standard and custom widths and
lengths. Standard length is 18 yards.

• Widths from 1/4” to 23”

• Longer lengths up to several times normal
length, dependent upon width. Check with
Customer Service.

Applications

3M 1181Tape is typically used for
applications requiring excellent electrical
conductivity from the application substrate
through the adhesive to the foil backing.
Common uses include grounding and EMI
shielding in equipment, components, shielded
rooms, etc. The copper foil backing is
solderable and resists oxidation and
discoloration.

Shielding Effectiveness

Many factors determine the true shielding
effectiveness of a shielding tape, including
type and thickness of foil, adhesive type,
intimacy of contact, smoothness of
application surface, strength and frequency of
the EMI signal, etc. However, using standard
tests and fixtures, it is possible to determine a
value for the attenuation.
For 3M 1181 Tape, typical shielding
effectiveness (far field) is in the range of 60dB
to 80dB (30 MHz to 1 GHz).

Properties Typical Values

Backing thickness

1

1.4 mil (0,04mm)

Total thickness (backing plus adhesive)

2

2.6 mil (.066mm)

Breaking strength 1 25 lb./in (44 N/10mm)

Adhesion to steel 1 35 oz/in (3,8 N/10mm)

Electrical resistance through adhesive

2

0.005 ohm

Flame retardancy 3 Pass

* Footnote: 1. Test method ASTM D 1000

2. MIL-STD-202 Method 3 07 maintained at 5 psi (3,4 N/cm

2

) measured over 1 in2 surface area. Conductive particles in the adhesive

provide the electrical path between the application substrate and the foil backing.

3. UL-recognized for flame retardancy per UL 510, Product Category 0ANZ2, File E17385.

3M is a trademark of 3M.

Important Notice

All statements, technical information and recommendations
related to the Seller’s products are based on information
believed to be reliable, but the accuracy or completeness
thereof is not guaranteed. Before utilizing the product, the
user should determine the suitability of the product for its
intended use. The user assumes all risks and liability
whatsoever in connection with such use.

Any statements or recommendations of the Seller which are
not contained in the Seller’s current publications shall have
no force or effect unless contained in an agreement signed
by an authorized officer of the Seller. The statements
contained herein are made in lieu of all warranties,

expressed or implied, including but not limited to the implied
warranties of merchantability and fitness for a particular
purpose which warranties are hereby expressly disclaimed.

SELLER SHALL NOT BE LIABLE TO THE USER OR ANY
OTHER PERSON UNDER ANY LEGAL THEORY,
INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR
STRICT LIABILITY, FOR ANY INJURY OR FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES SUSTAINED OR
INCURRED BY REASON OF THE USE OF ANY OF THE
SELLER’S PRODUCTS THAT WERE DEFECTIVE.

Electrical Products Division

6801 River Place Blvd.
Austin, TX 78726-9000

800 676 8381

http://www.3m.com/elpd

© 3M 1998

78-8124-4702-3