Double coated Cu/Ni Mesh Tape Product Description 3Μ™ CN 4490 double-coated Cu/Ni mesh tape consists of Copper and Nickel coated conductive mesh and unique electrically conductive pressuresensitive acrylic adhesive. • Cu/Ni coated conductive mesh • Conductive acrylic adhesive • Supplied on a removable liner for easy handling and die-cutting Like all 3M shielding tapes, 3M CN 4190 Double coated Cu/Ni mesh tape are available in standard and custom widths and lengths. Standard length is 50M. • Widths from 6mm to 500mm • Longer lengths up to several times normal length, dependent upon width. Check with Customer Service. Applications 3M CN 4190 double coated Cu/Ni mesh tape is typically used in many applications typically served by metal foil shielding tapes such as grounding and EMI shielding in equipment, components, shielded rooms, etc. The unique mesh backing offers the additional benefits of excellent flexibility and conformability, very light weight, and exceptional strength. The fabric backing also minimizes the possibility of finger lacerations. 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 CN 4190 double-coated Cu/Ni mesh tape, typical shielding effectiveness is in the range of 65dB to 70dB CN 4190 Double Coated Cu/Ni Mesh Tape – Typical Properties Properties Typical Value Type of Backing Copper/Nickel coated conductive mesh Type of Adhesive Conductive acrylic adhesive Total thickness (backing plus adhesive) 0.115mm Breaking strength 1 16 kgf/25mm (40 lb/in) Adhesion strength 1 1200gf/25mm (31 oz/in) Electrical resistance through adhesive 2 0.05Ω * Foot note 1. Test