Hook and loop has been around for decades, but that doesn't mean its various applications and designs aren't always expanding. Today, there are even hook and loop fasteners that will conduct electricity. This is managed by spray coating the hook and loop with liquid silver. Silver is used because it possesses the highest electrical conductivity of any element. It also has the highest thermal conductivity of any metal. Electrical conductivity measures an object’s ability to accommodate the transport of an electric charge.

Silver impregnated hook and loop.Silver impregnated hook and loop.Because the hook and loop is sprayed with the silver coating when it is manufactured, the price is actually dependent on the price of silver at that time.

[caption id="attachment_287" align="alignleft" width="150"]Silver coated electrically conductive hook and loop being peeled apart. Silver coated electrically conductive hook and loop being peeled apart.[/caption]

Electrically conductive hook and loop is used in all sorts of projects regarding radio frequency or electromagnetic interference. Electromagnetic shielding is another way this hook and loop closure is used. Electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. Essentially, it can protect equipment or people from high-intensity electromagnetic fields (used in grounding straps). It can also prevent the escape of signals from secure facilities. This makes it especially useful in the military, government buildings, hospitals, and private or classified organizations.

The resistivity of electrically conductive hook and loop has a maximum of 1.8 ohms per square inch on the hook, and 1.4 ohms per square inch on the loop. The closure combines for 0.8 ohms through resistance and has a cycle life of around 5,000 closures.