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Conductive Elastomers: Silicone vs. Fluorosilicone
Will Your Hardened Enclosure Remain Effective in Harsh Environments?

September 19, 2018

Conductive Silicones are often an essential component for hardened boxes and enclosures where environmental sealing and EMI/RFI shielding is required. The typical silicone-based gaskets and seals are impregnated with nickel, silver, copper, aluminum or other conductive particles to give non-conductive silicone their conductivity while providing IP rated environmental sealing that is required in many military electronic applications. These Conductive Silicone materials are also very flexible and can be formed into sheets, extrusions in various profiles, strips, washers and custom molded parts to fit almost any specific requirement, regardless of how unique. But the one issue with these essential conductive silicone ... Read more

Custom EMI Ventilation Panels: An End to the “Square Peg – Round Hole” EMI Shielding Dilemma

August 15, 2018

Hardened enclosures come in all shapes and sizes.  When you compound the possibilities of various applications, industries, specifications and regulatory authorities, it’s no wonder that standard sizes, types or material for shielding a hardened enclosure rarely meet specific needs for any given project.  Even though most hardened enclosures are custom designed with specific requirements in mind they often have one thing in common: They all must breathe to allow cooling of sensitive electronic equipment while also being protecting from EMI/RFI. Up until now this has been an ongoing problem for engineers.  Rarely are enclosures designed to be able to use standardized ... Read more

EMI/RFI Wire Mesh Grounding and Conductive Elastomer Washers: Hardened Enclosure Shielding in Small Places

July 19, 2018

MAJR Products EMI/RFI wire mesh grounding washersThe smallest details are often the ones that will determine whether an EMI hardened enclosure will be compliant or will not  meet EMC requirements. That’s especially true when it comes to the many bolts, screws, rods or shafts that need EMI/RFI shielding or grounding.  When you have to attenuate a signal or ground components of an enclosure, don’t forget the EMI/RFI wire mesh grounding or conductive washer. Here’s what you need to know: EMI/RFI Wire Mesh Grounding Washers EMI/RFI wire mesh grounding washers are made from wire mesh socks that look somewhat like thin knitted metal hoses before being compressed in a ... Read more

Conductive Coatings for Plastic Hardened Enclosures: Getting the Job Done Quickly and Cost Effectively

June 20, 2018

A typical example of a plastic hardened enclosure using MAJR Products conductive coatings.There is no doubt that plastics have their design advantages when building many hardened enclosures. Plastics products in various forms, such as acrylics, ABS or structural foams, are quick and inexpensive to produce once tooling is in place and can be molded or configured in complex designs much more readily than some other substrates. But because plastics are electrical insulators which easily allow EMI or RFI waves to penetrate the substrate, conductive coatings, i.e. conductive paints, pick up the slack where plastic alone would allow failure of your hardened enclosure. It becomes imperative, therefore, to consider conductive coatings when using ... Read more

A Guide to EMI Shielded Ventilation Panels: Protecting Your 2nd Largest Area of Exposure in a Hardened Enclosures

June 1, 2018

Shielded outdoor cabinets from Pepro, LLCThink about the need for EMI shielded ventilation panels – what they do and why you need them.  Are you fully protecting that hardened enclosure with the right option?  Does it measure up to standards for your civilian or military application? EMI shielded vent panels are the understated hero of hardened enclosures.  Second only to an access panel or door in terms of size, ventilation panels can act like a giant antenna, inviting outside EMI or RFI signals in.  At the same time, passive and ambient air vents or fan ventilation panels can also form a major conduit which lets uncontained ... Read more

EMP Shielding: The Background, Need and Solutions

May 21, 2018

No aspect of EMP shielding can be overlooked when constructing a hardened enclosure, or Faraday Cage, either for HEMP shielding or IEMI shielding for military or civilian industry use. Definitions & Distinctions HEMP is defined as an instantaneous, intense electromagnetic pulse (EMP) field that can overlaod and disrupt from great distances electrical systems and microcircuits. It is generally assumed if one occurred it would be set off by a high altitude nuclear explosion; obtainable by missle flight1 or, more recnetly believed, from a satellite. The only real defense for an event is with HEMP shielding. IEMI is defined as an intentional malicious generation of electromagnetic energy introducing noise or signals into electric and electronic systems, thereby disrupting, confusing or damaging the systems for the purpose of criminal or terrorist activities2. It ... Read more

EMI/RFI Wire Mesh Grounding Washers And Conductive Elastomer Washers

March 13, 2017

Conductive Silicone, also known as Conductive ElastomerEMI/RFI Wire Mesh Grounding Washers And Conductive Elastomer Washers With expertise in EMI/RFI shielding products development to be utilized in military and commercial applications, the engineers at MAJR Products provide EMC compliance and electrical safety grounding equipment. The grounding and conductive washers produced by MAJR Products are designed and manufactured to suit the needs of your specific application. EMI/RFI Wire Mesh Grounding Washers EMI grounding washers are designed to ensure positive electrical contact and EMC assurance for electronic equipment and shielded enclosures. MAJR Products’ extensive EMI/RFI shielding equipment development experience led us to design our knit wire mesh grounding washers with a goal ... Read more

Conductive Rubber – What It Is and Where It’s Used

February 19, 2014

Conductive Silicone, also known as Conductive Elastomer (5000 series) CONDUCTIVE RUBBER What It Is and Where It’s Used A MAJR Products Corp. Article by Mike Oliver         What is Conductive Rubber? Definition: Conductive Rubber is a generic term referring to any rubberized material with conductive properties which reduce or eliminate the EMI/RFI (electromagnetic interference and radio frequency interference) “noise” that is often associated with electronics. While there are a handful of materials that might be considered Conductive Rubber, this article will be focusing on the three common material types. Multicon (oriented wire in either sponge or solid silicone) Conductive Silicone (metallized filled silicones), and Radthin (wire screen imbedded into silicone). Each material is unique ... Read more

FORM-IN-PLACE Gasketing

February 21, 2013

Form in place EMI GasketsMAJR Products Form-in-Place automated EMI/RFI gasketing is offered to facilitate the increasing demand for shielding of smaller profile and mechanically tight tolerance areas for a variety of metal and plastic housings. Our software driven automated gasket dispensing system delivers a custom programmed precise bead of conductive elastomer to narrow flanges or edges as small as 0.030 in (0.762 mm). The robotic bead location holds a pattern positional accuracy to 0.003 in. (0.076 mm) in the X, Y, and Z axis dimensions; repeatability of each axis is 0.001 in. (0.025mm). Read more