In many industrial processes, the filling and emptying of big bags generates electrostatic charges. If flammable dusts or vapors are present in the environment, these charges can trigger an explosion. Therefore, anti-static or conductive big bags, classified as type B, C or D according to the industry standards.

In a nutshell:

• Type A: standard big bag, no specific protection from electrostatic charge, only usable in environments without explosive atmosphere.
• Type B: limit the breakdown voltage of the fabric to reduce the risk of very energetic discharges, but do not dissipate charges in a controlled manner.
• Type C: conductive big bags, equipped with groundable conductive yarns. They dissipate charges by mandatory grounding.
• Type D: “self-dissipating” antistatic big bags, designed to disperse charges without the need for grounding when used properly.

The choice of the correct type depends on three factors: nature of the product contained (flammable or not), presence of flammable vapors/gases in the environment, and characteristics of the explosive atmosphere (ATEX zones). In industries such as chemical, pharmaceutical, paints, pigments or very fine flours, the use of antistatic big bags is often a must to ensure safety.

In addition to the bag, procedure is key: grounding type C big bags, regularly checking grounding efficiency, avoiding using damaged or visibly worn big bags, and training operators on hazards and procedures. A wrong type or improperly used big bag negates safety benefits.

Sebino Pack can help the HSE department and production manager map critical process points, identify products and risk areas , and propose static-protective packaging solutions in line with regulations and company ATEX guidelines.