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Antistatic Big Bags: Type C and Type D
Pouring bulk material into an ordinary polypropylene bag builds up a static charge. If the cargo or the surrounding atmosphere is flammable, a discharge can cause ignition. Antistatic FIBCs — Type C and Type D — are made for these conditions.
A Type C (conductive) big bag has conductive threads woven into the fabric and interconnected to a grounding point. The bag must be connected to an earthing circuit before filling and discharge — only then does it provide protection. Type C is used where the grounding procedure is strictly enforced.
A Type D (dissipative) big bag dissipates charge into the air without grounding, thanks to a special fabric structure. It requires no connection to an earthing circuit, so it suits sites where grounding is technically impossible or cannot be guaranteed — for example, transfer in the field or at a third-party contractor.
We manufacture both types for specific operating conditions. The packaging type is selected according to the hazardous-area classification, cargo properties and availability of grounding on site — send us your conditions and we will propose a design.
Specifications
| Types | Type C (conductive) / Type D (dissipative) |
|---|---|
| Grounding | Type C — required, Type D — not required |
| Load capacity | 500–1500 kg |
| Loops | four-loop design |
| Liner | antistatic, on request |
| Fabric weight | specified per application |
| Printing | flexographic, up to 4 colours |
Where they are used
- Petrochemicals and hydrocarbon processing
- Chemical production, powdered reagents
- Pharmaceutical raw materials
- Flammable polymer powders and granules
- Sites with classified hazardous areas
FAQ
What is the difference between Type C and Type D?
Type C is conductive: conductive threads are woven into the fabric and the bag must be grounded before use. Type D dissipates charge without grounding thanks to its fabric structure. If grounding cannot be guaranteed on site, Type D is the safer choice.
Can an ordinary big bag be used for flammable cargo?
No. An ordinary polypropylene bag (Type A) accumulates charge, and with flammable materials or in an explosive atmosphere this creates an ignition risk. The packaging type must match the area classification and cargo properties.
Does an antistatic big bag need a special liner?
If a liner is used, it must also be antistatic — ordinary polyethylene film inside a conductive bag defeats the protection. We supply the complete assembly.
Do you provide documentation on antistatic properties?
The document package and test reports are agreed when the order is placed — the exact set depends on your plant's requirements.
Get in touch
We’re ready to discuss your order or answer any questions. Fill the form and we’ll contact you.
