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3M™ Fabric Tape CN-4490
Double-Coated Conductive
Description 3M™ Fabric Tape CN-4490 is a conductive, non-woven fabric and unique electrically
conductive pressure-sensit ive acrylic adhesive.
Applications CN-4490 tape is typically used for applications requiring excellent electrical conductivity
from the substrate through the adhesive to the conductive backing. Common uses
include grounding and EMI shielding equipment, components, shielded rooms, etc.
The unique and thin meta llized backing offers the additional benefits of excellent flexibility
and conformability, very light weight, and exceptional strength. The conductive backing
also helps minimize the possibility of finger lacerations.
Shielding Many factors determine the true shielding effectiveness of a shielding t ape, including
Effectiveness type and thickness of foil adhesive type, intimacy of contact, smoothness of
application surface, strength and freque ncy of the EMI signal, etc.
Typical Properties
Technical information provided consists of typical product data and should not be used for
specification purposes. Unless otherwise noted, all tests are performed at room temperature.
Physical
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Property (Test Method)
(ASTM D1000 unless noted) Typical Value
US units (metric)
Color Grey
Adhesive Conductive acrylic
Type of Backing Copper/Nickel coated conductive non-woven fabric
Total Thickness (backing plus adhesive) 2.0 mils (0,05 mm)
Liner Thickness 5.8 mils (0,14 mm)
Breaking Strength 35 lb/in (16 kgf/25 mm)
Adhesion Strength 40 oz/in (1000 gf/25 mm)
Data Sheet October 2008
3M™ Fabric Tape CN-4490
Double-Coated Conductive
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Typical Properties
Electrical
1 MIL-STD-202 Method 307 maintained at 5 psi (3,4 N/cm2) measured over in2 surface
area. Conductive particles in the adhesive provide the electrical path between the
application substrate and the f oil backing.
Specifications • Cu/Ni plated conductive non-woven fabric
• Conductive acrylic adhesive
• Supplied on a removable liner for easy handling and die cutting
Shelf Life & This product has a 5-year shelf life from date of manufacture when stored in a
Storage humidity controlled storage (50°F/10°C to 80°F/27°C and 75% relative humidity).
Availability For availability, please contact your local distributor. Names and addresses are
available from 3M.com/electrical [Where to Buy] or call 1-8 00-676-8381.
Important Notice All statements, technical information, and recommendations related to 3M’s products are based on
information believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this
product, you must evaluate it and determine if it is suitable for your intended application. You assume all
risks and liability associated with such use. Any statements relate d to the product which are not contained
in 3M’s current publications, or any contrary statements contained on your purchase order shall have no
force or effect unless expressly agreed upon, in writing, by an authorized officer of 3M.
Warranty; Limited This product will be free from defects in material and manufacture at the time of purchase. 3M MAKES
Remedy; Limited NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
Liability MERCHAN OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty
period stated above, your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or
refund the purchase price of the 3M product. Except where prohibited by law, 3M will not be liable for
any indirect, special, incidental or consequential loss or damage arising from this 3M product,
regardless of the legal theory asserted.
3M is a trademark of 3M Company.
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Electrical Markets Division
6801 River Place Blvd.
Austin, TX 78726-9000
800 676 8381 Please recycle.
FAX 800 828 9329 © 3M 2008 All rights reserved.
www.3M.com/electrical/oem 78-8127-7048-1_A
Property (Te st Meth od)
(ASTM D1000 unless noted) Typical Value
US units (metric)
Electrical Resistance Through Adhesive1 0.05 ohms
