Sometimes there is confusion between what is an anti static mat used for tables, and conductive mats that are used on floors. They are both ESD Mats, meaning that they prevent electrostatic discharge when grounded.

How doanti static matswork

When we go to handle electronics we want to make sure tables and floors are not electrically isolated, but instead electrically bonded.

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The borderline between conductive and static dissipative is 1 million ohms per square. This is also referred to as 1 meg ohm. It is 1 x 106 ohms / square.

Static electrons can sit on the surface of insulating materials found in tables and floors, so we use ESD mats to cover these surfaces.

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Anti static matsfor Electronics

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The ANSI / ESD standard for the measurement of table worksurfaces is ANSI / ESD S4.1 Worksurfaces- Resistance Measurements. It recommends that the static dissipative sides of anti static mats should measure no more than 1 x 109 ohms / square.

Conductive mats are black because they are infused with carbon. Carbon is conductive, and it is the active material in these mats that conducts static electricity to the ground. It is also one of the conducting materials in heel grounders which is why the bottom of these are black.

These mats are normally used for covering tables, tray liners, or as “runners” for the length of the floor for an assembly line.

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The top static dissipative layer captures static off tools and electronics laid on top of the mat, while a snap is attached through the top layer of the mat to make contact with the bottom conductive layer of the mat so that the mat can be connected to an electrical outlet by using grounding.

ESD Mats used on top of tables or workstations are typically two-ply (meaning two-layer) rubber mats. (This is sometimes also called a “static dissipative mat”). It is comprised of two layers: a top static dissipative rubber layer and a bottom black carbon-loaded conductive scrim layer.

Anti StaticTable Mat

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The heel grounder maintains its connection with the body via a silver knitted ribbon that is tucked into the inside of the wearer’s sock. This gives static on the body’s surface a dedicated ground path through the heel grounder into the mat. From there, static travels the electrical connection between the mat and the electrical outlet bypassing the floor surface via the grounding cable.

The active ingredient used in mats to make them conductive is carbon. Since carbon is black you can easily distinguish its presence from static dissipative material in the mat.

Bonding allows those static electrons to discharge from tables and floors into the ground beneath the building they are in. The most common way to “ground” tables and floors is to connect them to an electrical outlet.

We recommend you have mats attached to the ground for every 5 feet of matting on either side of the ground point. They should not be grounded in series, i.e., “daisy-chained” together. Instead, directly connect the wires to a ground line in the electrical outlet.