3M CN4490 1/2" X 4"-100

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RFI and EMI (Radio Frequency Interference and Electromagnetic Interference) shielding and absorbing materials provide effective shielding and absorbtion of electromagnetic signals for preventing interference in a broad range of frequency and power levels. 3M CN4490 1/2" X 4"-100 is one such product that is available in the market for providing these shielding and absorptive features.

The 3M CN4490 1/2" X 4"-100 is a conductive film with high flexibility, handling ease, and adhesive with low cell structure. It has a high shielding effectiveness of greater than 99.997% in electrical and physical properties. This product is 4-layer for EMI/RFI noise shielding. The top layer is a non-conductive 2 mil high-strength polyester film; the second layer is a 0.5 mil adhesive coat; the third layer is a 0.5 mil conductive film made of nickel- undercoated stainless steel mesh, and the fourth layer is a 0.5 mil release liner. Together, these four layers create an effective EMI/RFI shielding product with excellent electrical and physical properties.

It is used primarily for shielding in products and equipment used for communication and information technology. It provides complete protection against both incoming and outgoing electrical and electromagnetic signals. This shielding film can be used for various applications such as in electrical panels and enclosures, equipment bags, racks, cages, and computer networks. It is especially beneficial in high-frequency transmission lines and cables, where the shielding film can provide a total solution to protect against the electromagnetic interference.

The working principle of the 3M CN4490 1/2" X 4"-100 is based on the concept of shielding. The shielding material blocks the electromagnetic waves from reaching its destination and actually absorbs the energy, preventing it from being reflected or scattered. This product has four different layers in its structure to increase its effectiveness. The first layer acts as a mechanical barrier that blocks out the electromagnetic waves. The second layer is a conductive film with a high electrical conductivity which absorbs the majority of the waves while the third layer is a 0.5 mil shielding film that is made of nickel-undercoated stainless steel, providing a high degree of shielding from unwanted electromagnetic fields. The fourth layer is a 0.5 mil release liner which provides additional layers of insulation, preventing any heat from escaping.

The 3M CN4490 1/2" X 4"-100 is an ideal solution for shielding from both incoming and outgoing EMI and RFI. It has excellent adhesive properties, making it ideal for applications in which the shielding needs to stay in place. This product is highly flexible which makes it easy to install and remove as needed. It is also highly effective in providing total protection from unwanted electromagnetic interference and improving the performance of communication equipment.

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