Bulk bags, also known as FIBC’s (Flexible Intermediate Bulk Containers), semi-bulk bags, totes or jumbo
bags. Bulk bags can be transported using conventional methods such as shipping containers, road and rail
transport and depending on the weight and contents it is possible to double stack with specially designed
pallets that allow for forklift access.
Bulk bags have a wide and varied range of transport uses such as: fine powders, food grade products,
pharmaceuticals, chemicals, agricultural products, building & construction materials, minerals & powdered
metals, petroleum products, plastics, wood and paper products.
Silverback’s bulk bag products are extremely reliable and give peace of mind that our bags will do what they are designed to do. All our bulk bags products are designed, manufactured and tested for compliance with AS/NZS 3668- 1989 and are backed by the Silverback assurance of quality.
The size of the bag depends on the quantity and the density o f
the material. Manufacturing any size is possible as long as it suits
your needs. Common capacity varies from 500kg - 2500kg.
It is an industry standard requiring the bulk bag to handle five
or six times its safe working load (SWL), normally written as a
ratio, “5:1 or 6:1 SF”.
Woven PP or PE is commonly used. The fabric is UV stabilised
so that it does not degrade under direct sunlight. All stitching
is double stitched using high tenacity heavy denier PP
multifilament yarn. Bulk bags can also be fitted with liners that
prevent moisture from reaching the product.
Bulk bags can be filled manually using hand tools (shovels),
gravity fed silos or hoppers, conveyors or other machinery
such as skid steers or excavators. To assist with hopper or silo
filling methods bulk bags can have standard and customised
spouts that can be secured to the hopper or silo discharge
chute and then sealed when full to protect the cargo. Duffle
top bulk bags allow for larger loading opening and can be
closed over to seal the cargo from contamination.
Accepted as the industry standard around the world,
the (U-Panel) bulk bag is the most popular shape. Two-piece construction that has two seams sewn along the
two opposite sides to create two panels, creating a “U”
panel shape. This construction gives the bag a large
Emptying bulk bags is achieved
via the in-built discharge spout
which can be customised to suit
the shape of what the cargo is
emptied into, manually (shovel)
via the duffle top opening or
by simply slitting the bottom or
lower side of the bag.
Bags can be lifted using loops made of heavy-duty webbing or belts made of high denier PP
multifilament yarn or PP monofilament tapes. These belts are strong and undergo stringent quality
checks to ensure no accidents occur while handling these bags. Filled bulk bags are designed for
handling using a forklift with standard tyne set up or lifting equipment such as lifting chains or slings.
Classification of Bulk Bags - FIBC's
Type - A. No special electrostatic safety features
Type - B. Not capable of generating propagating brush discharges. The walls of these bags
exhibit a breakdown voltage of 4 kilovolts or less.
Type - C. (Conductive) Constructed from electrically conductive fabric, designed to control
electrostatic charges by grounding. A standard fabric used contains conductive threads or tape.
Type - D. (Anti-Static) Have anti-static or static dissipative properties without the requirement
UN Type. These bags are designed to handle products that the United Nations considers a
Advantages of using Bulk Bags
Eco-friendly working conditions.
Flexible, collapsible, durable.
Packing of powders, granules, flakes or any free flowing material can be done efficiently.
Spillage and pilferage losses are minimised.
Savings in packaging, handling & labour cost.
Requires less space for storage.
Faster loading and unloading of materials.
Light in weight.
Agriculture: Packaging rice, flour, seeds, animal feed, corn, vegetables, fruit and fertiliser.
Chemical: Calcium carbonate, magnesium oxide, graphite powder, potassium chloride, bisphenol and other chemical powder products.
Building: Because of the simple, convenient operation and low cost, bulk bags are widely used in the building industry.
Plastics: One of the most commonly used packaging bags for plastic particles. Strong, durable, easy to operate and can improve the efficiency of loading and unloading.
Food: Widely used in the food industry transporting food additives, flour and sugar.