How the ESD coverall eliminate static electricity

At present, ESD coverall are mainly made of conductive yarn containing conductive fiber and conventional yarn with certain technology. The conductive function of conductive fiber is realized by electronic conductive mechanism without humidity dependence; Its charge half-life is very short, and it can eliminate static electricity in a very short time in any case.

Textile fibers and their products mostly belong to polymer materials. The conductive mechanism of polymers can be divided into two types: electron conduction and ion conduction: the carriers of electron conduction are electrons and holes; The carriers of ionic conductivity are positive and negative ions. The elimination of static electricity in Antistatic Fabrics and clothing made of conductive fiber and conventional fiber is the result of the combined action of electronic conductivity and ionic conductivity.

The mechanism of eliminating static electricity in Antistatic Fabrics and clothing containing conductive fibers is related to whether the conductive fibers are grounded.

Here are two categories：

• Process of static electricity on ungrounded ESD coverall

• Electrostatic process on grounded ESD coverall

Process of static electricity on ungrounded ESD coverall

The process of static electricity on ungrounded ESD coverall is roughly as follows:

1. ESD coverall are charged due to friction, contact, separation, etc;

2. The charge generated in the fabric or clothing (charged body) collects into the ESD coverall, which induces the charge opposite to the charge symbol on the fabric or clothing;

3. Strong electric field is induced near the ESD coverall, so that the surrounding air is ionized by the electric field;

4. Among the positive and negative ions generated by corona discharge, the ions with the opposite nature of the charge carried by the fabric or clothing move to the fabric or clothing, neutralize with the charge carried by the fabric or clothing, and eliminate static electricity.

Electrostatic process on grounded ESD coverall

The electrostatic process on grounded ESD coverall is roughly as follows:

At the same time of corona discharge, the induced charge accumulates around the ESD coverall and then leaks into the earth. When the charged body (fabric or clothing) is close to the grounded ESD coverall, positive and negative ions are generated around the ESD coverall, in which the ions opposite to the charge carried by the charged body move to the charged body for neutralization, and the ions with the same charge as the charged body leak to the earth through the electrostatic work clothes, so that the static electricity is eliminated.

When using low proportion metal fiber ESD coverall, the conductive fiber is not grounded;

When only anti-static clothing is worn, the conductive fiber is not grounded

When anti-static clothing is worn and anti-static shoes and socks are also worn, it is conductive fiber grounding.

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