Flexible Intermediate Bulk Containers (FIBCs)
topic
Flexible intermediate bulk containers (FIBCs), commonly called big bags or bulk bags, are large industrial woven PP fabric containers designed to store and transport dry flowable materials — chemicals, minerals, food ingredients, construction materials — in quantities of 500–2,000 kg per bag. Woven PP fabric construction (flat tape yarns, 8–14 threads/cm warp and weft, basis weight 100–200 g/m², tensile strength 15–45 kN/m per ISO 13934-1) provides the primary structural element with safety factor of 5:1 or 6:1 (safe working load to minimum breaking strength ratio per ISO 21898). FIBC types by static electricity performance: Type A (no protection, conductive materials only), Type B (breakdown voltage >6 kV), Type C (conductive, earthed, surface resistance <10⁷ Ω, for flammable powders), Type D (static dissipative, no earthing required, surface resistance 10⁷–10¹¹ Ω, quasi-static discharge). UN certification (UN 13H3 for dangerous goods, drop test from 0.8–1.8 m at 5× safe working load) required for hazardous material containment. Liner options: inner PE film liner (60–120 µm) for moisture-sensitive materials, barrier coatings for food-grade applications meeting EU 10/2011 food contact regulation. Global FIBC market exceeds $4.8 billion; China produces 65% of global supply at $3–8/bag for standard types versus $15–40 for UN-certified or Type C/D antistatic variants.
Role
FIBCs are the dominant bulk packaging format for the global chemical, mineral, food, and agricultural commodity trade, combining the load capacity of 20–30 traditional sacks in a single reusable unit that reduces packaging cost by 40–60%, handling labour by 70–80%, and packaging waste volume by 85–90% versus equivalent small bag systems.