Have you ever wondered how you can best and most affordably EMF (electro-magnetic field) shield a room in your house? With LINQSTAT VCF (Volume Conductive Film) of course.
A direct equivalent to 3M Velostat (read the article on when is a generic brand good enough), LINQSTAT VCF is a very low cost (up to 50% cheaper than 3M Velostat), volume conductive film for EMI/RF shielding.
What’s the difference between volume conductive and just conductive?
Like its 3M Velostat equivalent, LINQSTAT VCF is a carbon impregnated black polyethylene film. The carbon impregnation gives it a volume conductivity that fends off EMF, but cannot be used to conduct electricity. Though an electrically conductive medium (such as tin or silver) could also be used for EMF shielding, these materials are many times more expensive and just simply not necessary for EMF Shielding or ESD (electro-static discharge) prevention.
The most cost-effective solution is with LINQSTAT VCF is 72″ wide x 150′ long rolls
The conductivity is not affected by aging or humidity and with a volume resistivity of <500 Ohms/cm and a surface resistivity of <31,000 ohms/cm2 the LINQSTAT is an excellent conductor for a plastic.
How thick is thick enough?
Though the LINQSTAT is available in various thicknesses, the normal thickness of 4mil (100µm or 0.004″) is recommended For extra toughness, heavy duty 8mil (200µm or 0.008″) thickness can be used, but the thickness implies more material which is more expensive, and shipping costs roughly double since the weight of the material is also doubled. If you really want to use 8mil thicknesses in some areas, then we recommend to simply put two layers of 4mil thickness instead. It’s much more cost-effective.
How else can I can it more cost-effective?
Certainly for large covering jobs like EMF shielding a room in your house (see our article on Cost-effective way to shield house from RF/EMI), you can think of this like EMF wallpaper; the wider the sheets, the better. Standard rolls are available in 36″(0.91 m) width and 72″ (1.83 m) widths. If you’re wondering how the heck you can handle a 72″ wide roll, let me reassure you that these are supplied in what’s known as a V-sheet. A V-sheet is simply a sheet that is 72″ wide folded over on itself. Therefore a 72″ wide roll is actually folded over on itself and supplied as a 36″ wide roll.
Secondly, the length of the roll matters. Standard lengths are 150′ (46m) and 750′ (229 m). Therefore instead of ordering 5 rolls of 150′ length, a single roll of 750′ length will do. To summarize the above information, it is more cost-effective to order a single roll of V-sheet 72″ wide by 750′ long LINQSTAT VCF than to order 10 rolls of 36″ wide by 150′ long rolls.
Where else can it be used?
As discussed here, LINQSTAT VCF can be used to line walls, windows and floors, but because it can be heat-sealed, it is also great for wrapping electrical wires, telephone cords and computer cords too. For these applications, a special tubing version is available.
CAPLINQ is a specialty plastics supplier offering a range of conductive materials including our broad range of electrically conductive plastics and antistatic tapes and films. If you have any questions, please don’t hesitate to contact us to find out how we can help you with other EMI/RF Shielding tips.