Posted By 0 Comment(s) 150 View(s)
GENERAL INFORMATION ON EMI AND EMI SHIELDING
Electromagnetic interference (EMI), also known as radio frequency interference (RFI) refers to the “unwanted noise” in an electrical path or circuit. This is a disturbance, which is caused by an outside electrical source, either natural or human-made, that could lead devices to under-function, malfunction or even to stop working completely. EMI fields are often found in areas with electricity flows. With a more powerful flow, strength of these fields increases and can disrupt signal movement to microprocessors and transmitter-receiver systems. A common example, that everyone is familiar with, is when a cellphone, placed near some other powered audio equipment or speakers, generates an annoying beeping noise.
Rapid technological development in composites and other sectors has raised the demand for lightweight, high performance and cost effective shielding materials for protection against the negative effects of EMI. Following this demand, Fibermax offers P25VC, a specialy made nonwoven veil with respective technical specifications. The manufacturing of this fabric is developed as an endless production, so it is particularly suitable for large surface composite components, like battery housing covers. The low density of only 25 g per square meter along with the parallel use of light-weight Fibermax composite materials, lead to weight savings of up to one-third, in comparison to aluminum materials. To give a quantitative weight savings indication example, this could result in an approximately 5 kg weight reduction in the battery casing of an electric car.
Besides the above, P25VC also has other very interesting properties that could be taken advantage of to improve performance of some products in a more sophisticated way. Namely, it has high electric and heat conductivity, it is infrared reflective, antistatic, anticorrosive and has antibacterial properties.
FIBERMAX P25VC USED FOR EMI SHIELDING OF ELECTRONIC COMPONENTS
Shielding with a lightweight fabric like P25VC in order to prevent internally generated signals from interfering with any surrounding electronic elements, is proved to be a high quality manufacturing technique, ideal for optimizing performance to weight ratio. As mentioned above, the fabric is usually applied to casings, to isolate electrical devices from the external environment and vice versa. Using its high quality electrical shielding ability on casings, the impact of EMI can be minimized. In the contrary, conventional technologies utilize aluminum to encase electric components in housings. However, increasing aluminum proportion in airplanes or other vehicles would increase weight considerably, affecting both vehicle range and driving dynamics. At the same time, costs may increase, since aluminum casing tools could be expensive and wear out quickly.
FIBERMAX P25VC USED FOR EMI PROTECTION OF BUILDINGS
Besides all of the benefits above, P25VC could be useful in other aspects of everyday life, like protection of buildings and human exposure to electromagnetic fields. The electromagnetic spectrum consists of fields generated by numerous human-made sources, including the ones that come out of high voltage wires, high frequency information transmission radiowaves, Wi-Fi, bluetooth and many more. A significant number of modern electronic devices like cell phones, computers, modems, TV broadcasting antennas, radio stations, medical imaging devices, etc., could also cause RFI. Based on this, P25VC could effectively minimize the entry of electromagnetic waves by forming highly powerful barriers against external radio frequencies.
Another good use of P25VC could be to restrict the excessive use of cell phones or isolate certain interior spaces from the outside world. Some examples of spaces that could employ such isolation include recording studios, theaters, medical or other critical situation operating rooms, airplanes, libraries, and more. Thus, with this veil any interior space could be protected from potentially harmful electromagnetic radiation.
OTHER INTERESTING BENEFITS OF P25VC
This ultralight, high strength veil fabric offers a list of other benefits. First of all, it is infrared reflective, antistatic, anticorrosive and has a high electric and heat conductivity. In addition to this, it is especially suitable for applications such as reflection and dissipation of temperature, heat trace reduction or aircraft lightning protection. Also, its antimicrobial properties make it an ideal component for medical applications, for example when using it as a surface veil in manufacturing of medical machine casings.
In conclusion, living in a technologically-dependent world, where electromagnetic fields are generated everywhere, EMI/RFI shielding techniques should be seriously considered, either for protection of electronic components, as a performance enhancer, or as a method of protection of certain indoor spaces, and much more. Thus, Fibermax EMI shielding veil P25VC, bringing together the optimal combination of solid expertise and practical utility, could positively meet certain needs of both the tech industry and the safety of modern lifestyle.