Electromagnetic shielding

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Electromagnetic shielding
The phenomenon known as "electromagnetic interference" has been when sensitive electronic equipment and instruments receive electromagnetic radiation, these devices are affected by said unwanted radiation and can suffer a malfunction or failure. Generally this electromagnetic radiation is emitted by other electrical or electronic equipment nearby as they may be; radio, fans, phones, microwaves, computers. These types of consequences can be especially critical in life-saving devices, such as cardiac pacemakers, for example. These effects are growing a lot due to the growing demand of electronic devices that work at higher frequencies, to a more intensive use by the general population of electronic devices such as smartphones, tablets, automotive electronics and the progressive miniaturization that is associated to the evolution of these teams. In general it is necessary to protect these components against electromagnetic interference to reduce the associated risks.
Electrical conductivity is a requirement of plastic materials to reduce or remove the shielding. The effect of electromagnetic interference can be reduced or eliminated by placing a plastic material electrically conductive, shielded between the source of the electromagnetic field and the component sensitive to it. This is due to the physical phenomenon in which electric fields and variable magnetic fields induce current in the electrically conductive material. For many years, thanks to its high electrical conductivity, metals have been used for years as a shielding material. One way to overcome the problems is the incorporation of fractions of small volume of metallic material, and other electrically conductive charges in a non-conductive thermoplastic matrix The composition process. In Mexpolimeros we have different options of loads and conductive fillers that are not lethal or carbon black, so that it maintains a low density with high electrical conductivity. Traditionally, metal or carbon black have been used for this purpose. But the use of high percentages of these charges in the plastic matrix tends to be detrimental to the processability of the final material, its density, surface quality, costs and mechanical properties of the final part injected. In addition, the materials loaded with carbon black are also limited in their use by the color obtained, black in all cases.