FIBC bulk bags — also called jumbo bags, ton bags, or big bags — are the workhorses of industrial bulk packaging. For procurement managers sourcing bulk bags for mining, chemicals, agriculture, or construction, understanding the four electrostatic safety types, UN certification requirements, and custom design options is essential to specifying the right bag for the right application.
The single most important classification for FIBC procurement is electrostatic safety type. Choosing the wrong type in a flammable or dust-rich environment is a safety risk, not just a packaging mistake.
| Type | Static Protection | Key Feature | Typical Application |
|---|---|---|---|
| A | None | Standard polypropylene fabric, no static control | Non-flammable products, no flammable atmosphere: sand, gravel, grain in safe environments |
| B | Low breakdown voltage | Prevents propagating brush discharges; fabric breakdown voltage below 6 kV | Dry powders where dust clouds may form but no flammable solvents present |
| C | Conductive with grounding | Interconnected conductive threads woven into fabric; requires grounding tab connection | Flammable powders, chemical powders, environments with flammable gases/vapors |
| D | Anti-static, no grounding | Anti-static fabric dissipates charge without grounding; no operator connection required | Flammable atmospheres where grounding is impractical; chemical industry |
Safe Working Load (SWL): Standard FIBCs range from 500 kg to 2,000 kg, with a safety factor of 5:1 for single-trip bags and 6:1 for multi-trip bags. A 5:1 safety factor means the bag is tested to hold five times its rated capacity before failure. Specifying the correct SWL ensures both safety and cost efficiency.
UN Certification: For transporting dangerous goods internationally, UN certified FIBCs are mandatory. Each UN certified bag carries a permanent mark indicating the UN standard, packing group, and maximum gross mass. UN certification involves rigorous testing including drop tests, stacking tests, tear tests, and topple tests.
Liner Options: Form-fit liners, tubular liners, and flat liners made from LDPE or multi-layer films provide moisture protection, contamination barriers, and product containment for fine powders. For food-grade applications, FDA-compliant liners manufactured under cleanroom conditions are standard.
Filling and Discharge: FIBCs are configured with different top and bottom designs. Open top, duffle top, and spout top control filling efficiency. Flat bottom, discharge spout, and iris valve bottom determine emptying speed and dust control. A chemical industry application requiring dust-free discharge will specify a sealed spout bottom, while construction materials like sand and gravel typically use a simple flat or duffle bottom.
FIBC bulk bags for mining applications prioritize abrasion resistance and UV stabilization for outdoor storage. Agriculture bags for fertilizers and plant nutrition typically include moisture-barrier liners. Food-grade FIBCs — used for food items like sugar, flour, and starch — require FDA-compliant materials, cleanroom manufacturing, and full traceability documentation. Bags for animal feed and stock feed need durability combined with cost-effective single-trip designs.
With 40 years of woven packaging experience and a production capacity of 30,000 metric tons annually across 80,000 square meters of factory space, Shengshi Jintang manufactures FIBC bulk bags for customers in approximately 30 countries. Every production stage — from PP tape extrusion through weaving, coating, cutting, and sewing — is completed in-house. A 50,000-square-meter cleanroom supports food-grade manufacturing. The quality system includes piece-by-piece inspection and load testing to validate SWL ratings.
For procurement managers sourcing FIBC bulk bags, the full PP woven bag and BOPP laminated bag product lines are also available from a single supplier, simplifying multi-format packaging procurement.
Contact Shengshi Jintang for Type A/B/C/D FIBC specifications, UN certification details, and custom design options.
harryfeng@jintangpacking.comRelated Products
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