Fabric Tape CN-4190

The 3M copper nickel-plated conductive woven fabric tape CN4190 is a self-stick EMI tape that provides a good electrical conductive path for EMI shielding and ESD grounding in small consumer electronics, such as mobile handhelds, digital still cameras, and liquid crystal display televisions. Tape CN4190 has a copper nickel-plated woven backing coated with conductive acrylic adhesive on both sides and is repositionable. It provides a conductive interface between electronic components. Unlike metal foil tapes that have sharp edges and a stiff feel, this tape, with its woven backing, is flexible and conformable and has a 35 lb/inch tensile strength.

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. However, using standard tests and fixtures, it is possible to determine a value for the attenuations. For CN-4190 fabric tape, typical shielding effectiveness is in the range of 65 dB to 70 dB. Before using this product, the user must evaluate it and determine if it is suitable for the intended application.

This product has a 5-year shelf life from date of manufacture when stored in a humidity controlled storage (50°F/10°C to 80°F/27°C and 75% relative humidity).

These tapes can be converted into sheets, slit rolls and custom die cut parts. DigiKey can offer you a quote on your secondary services. For more information on 3M available options or if you need assistance, contact CustomCut.3MProducts@digikey.com. Please send outline dimensional drawings to the aforementioned e-mail address.