Static charge on a material can build up along the process. Friction between idle rollers and film create a charge. Each new friction accumulates charge. Charges can rapidly become very high. Charges over 100 kV are not uncommon. When a static charge exceeds a certain level, spontaneous discharges and sparks can occur. This may lead to ignition of the fumes, and most likely a fire.
In explosionhazardous zones it is very important to keep the static level below 3000 V to prevent spontaneous sparks. Anti static bars should be places at various stages in the process to keep the level below 3000 V.
Products used in this application: P-Sh-N-Ex