Tag Archives: EMI

Things You Should Know About Elastomer Products

Published / by mimin

Electromagnetic interference (EMI) can significantly affect the functioning of a wide variety of products and disrupt the lives of those who depend on them. In such environments as a hospital or the military, this can even have far-reaching consequences. Numerous sources, including computer circuits, nearby electronic devices, power lines and even switches can cause this interference. EMI shielding is effective in preventing these radiations from interfering with devices and even stops the cross talk within the circuit of a particular device.. Traditionally, these protective solutions were made of metal sheets. Constructed with steel, copper or aluminum, these shielding products offer robust protection against electromagnetic disturbances. However, they are very prone to deformation. The fault lies in their design, which emphasizes making the enclosure extremely snug in order to prevent EMI leakage. This creates excessive mechanical pressure, and under this pressure, the metal EMI shields tend to deform. Then, some metals are more susceptible to oxidation and rusting. Elastomer products can overcome these shielding challenges. Here are three major benefits of these sophisticated shielding products:

Improved Efficiency of EMI Shielding Gaskets

Made of different types of polymers and blended with metal fillers, new generation elastomer products ensure superior EMI shielding. They also ensure a long performance life for the gaskets. An important thing to consider when selecting a conductive elastomer as an EMI shielding or environment seal gasket is galvanic compatibility. When you use two dissimilar materials, one of them tend to oxidize and fail to provide effective shielding in the long-run. The right gasket will offer the protection while undergoing minimum galvanic corrosion. Silicone shielding elastomers, that combine the properties of silicone rubber and metals, is often a good choice.

Feature-packed

Apart from increasing gasket efficiency, elastomer helps tone down the compression that builds up within the gaskets. This in turn improves air circulation inside the gasket. You can customize elastomeric products cost-effectively to meet the needs of specific production environments. As a result, you can find corrosion-resistant and flame-resistant products in the market. Apart from being robust and corrosion-resistant, these products are high on aesthetic appeal.

Efficient Shielding of Military Electronics

Militaries across the globe rely on technologies to gain an edge over their enemies. From anticipating enemy tactics to responding to their attacks, they rely heavily on a host of electronic devices such as radios, sensors, cameras and unmanned tactical weapons. However, these devices are particularly susceptible to electronic jamming or intentional EMI, a threat that endanger the lives of those fighting it out on the battlegrounds. Elastomer shields offer guaranteed protection against such intrusions.

When it comes to protecting your applications from EMI disturbances elastomer products can help you achieve correct shielding effectiveness. While selecting a product, the first thing you need to consider is the appropriate shape or type of gasket. The next important criteria relates to the polymer material.

Different elastomer products are made of different types of polymers such as Silicone, Fluorosilicone and Ethylene Propylene Diene Monomer (EPDM). Each one works in specific kind of environments. The types of environment your products will interact with will determine the type of polymer that you should opt for.

Interesting Fact About Electromagnetic Compatibility

Published / by mimin

Electromagnetic Compatibility or EMC is assuming increasing importance in today’s device intensive world. This means, question of radiation and interference to critical electronic equipment or their components is more of a risk today than it ever was. Another important fact to consider is that a number of devices that can malfunction with electromagnetic radiation operate in highly sensitive environments. Airplane cockpits and hospitals are just two examples where any interference to such equipment can result in some serious risk to human lives. There is little doubt that a comprehensive knowledge of EMC is absolutely essential for manufacturers and designers of products with components that cause such interference or that can be impacted by it. Equally important is the knowledge of how a shielded enclosure can safeguard their product and the environment where it will work.

Factoring in EMC at Product Design and Development Stage

It is critical to consider EMC right from the stage when the product is on the drawing board. At this stage, many designers and manufacturers tend to pay attention mainly to the physical attributes and the functionality of the final product. But, will it perform efficiently when deployed in its environment? Will other devices impair its functioning? Or, will it disrupt the working of other devices?

For example, consider a wireless, remote-controlled light that is ideal for operating room conditions. If this product emits electromagnetic interference (EMI) that causes critical life support equipment or vital signs monitoring equipment to falter, no surgeon would be willing to risk giving it a trial at his hospital. Considering these factors at the design and development stage can save the manufacturer money, time and production costs while ensuring that the result is a safe and viable product.

Choosing the Shielding Material and Type with Care

Electromagnetic shielding is often done with the dual objective of blocking both EMI and RFI (radio frequency interference).- A number of materials, mainly metals, are used commonly for this purpose. For example, you may find copper, aluminum, nickel or steel alloy in a shielded enclosure. While all of these are effective, many manufacturers believe that an alloy made from nickel, copper, iron and molybdenum offers the most effective shielding.

The manner in which these metals are used is also important and there are differences in this aspect too. Some use solid sheets, while others prefer perforated sheets. Coatings and screens of EMI resistant materials are also quite common. The type of material to use and the form in which it is used are both factors you should consider well before the product reaches the final production stage. You should test a prototype of the EMI shielded product in actual working conditions to verify that the shielding is holding up as expected, before the product goes out in the market.

The variety and range of shielded enclosure options make it easy for you to find the perfect one for your product. Make sure to invest your resources in this task at the right time in your production cycle and you can have a truly successful product on your hands.