FIBC glossary

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Big Bag (FIBC) glossary

The technical terms found in data sheets and quotes, explained in one line.

FIBCFlexible Intermediate Bulk Container: the technical name for a Big Bag.
SWLSafe Working Load: the rated load the Big Bag can carry safely.
Safety factorRatio between the break load in testing and the SWL (5:1, 6:1).
Duffle topFilling through a fabric skirt that is tied after filling.
Open topBig Bag with no top cover, for direct filling.
Filling spoutFabric tube at the top for filling from a hopper or bagging machine.
Discharge spoutFabric tube at the bottom for controlled emptying.
Flat bottomClosed base with no spout; emptied by cutting or tipping the Big Bag.
LinerPolyethylene inner bag that protects against moisture and contamination.
Baffles (Q-bag)Internal panels sewn across the corners that keep the filled Big Bag square. In Spanish we call them templadores.
Q-bagBig Bag with internal baffles.
U-panelConstruction from one U-shaped piece of fabric plus two side panels.
Tubular fabric (circular)Fabric woven as a tube, with no side seams. Once the loops are sewn, the Big Bag is square.
Coated fabricFabric with a coating that reduces dust and moisture penetration.
UV additiveAdditive that protects the fabric from sun degradation.
Type A, B, C, DClassification of protection against static electricity.
Fabric weight (GSM)Fabric weight per square meter; it defines its strength.
ISO 21898International standard of requirements for FIBCs for non-dangerous goods.

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