Although commonly known as jumbo bags, FIBCs, or Flexible Intermediate Bulk Containers are bags used by food, pharmaceutical, construction, and other industries for handling and transporting goods in bulk. Since they are manufactured with durability and reliability in mind, they are reusable, and thus make economic sense to use.
Commonly constructed from polypropylene, jumbo bags in Singapore come in different sizes, types, SWL capacities, and forms of construction. There are also food grade bags and hazardous material bags that have undergone UN certification for safety standards.
There are four general types of jumbo bags:
- Regular jumbo bags are the most common, with safe working load (SWL) capacities ranging 500 kilos to 2000 kilos. Known as Type A FIBC bags, they generally used to transport powdery goods that are dry and non-flammable.
- Type B bags are, like Type A bags, constructed from polypropylene. While they can be used to transport flammable powders, it is imperative that gases or solvents are not near the bags.
- Conductive FIBC bags are designated as Type C bags. Constructed from propylene and conductive yarn, Type C bags are used for transporting flammable powders. This design is used to control electrostatic discharges. During the filling and emptying process, these bags must be grounded to ensure that the contents do not ignite.
- Type D bags are also known as Dissipative FIBCs. They are used to transport flammable powders where the surrounding environment may contain flammable solvents.They are constructed from antistatic fabrics and dissipative threads which help prevent sparks and brush discharges.
There are also lined jumbo bags that feature multiple layers of liners. These are used for transporting goods that are highly hygroscopic, or tend to attract moisture. Such FIBCs help ensure that the enclosed products remain dry and stable during transport.
FIBC construction methods can use U-panels, 4-panels, circular, and baffled construction. U-panel construction uses three panels and are the most highly rated in terms of SWL capacity and durability. 4-panel jumbo bag construction when the end user desires a stable shape for storage. Although more laborious to produce, they tend to remain square due their method of construction.
Circular bags are the most simple to construct, requiring only one stitch down the side and another along the bottom. When filled, they do not necessarily remain tube-like. For extra strength, jumbo bags can be ordered with baffles, which are extra panels stitched onto the most-stressed areas of an FIBC.