Bulk bags are a popular packaging solution for large quantities of product such as aggregates and waste. They have many names which include, Tonne bags, Dumpy bags, FIBC’s, Builders bags
The range of sizes and specifications of Bulk bags are vast and each type will suit a different use. The specifications can also be quite detailed and technical which can sometimes make it difficult to determine what type will be needed for the required use.
When deciding on the right type of FIBC, the following points should be considered;
– Physical properties or chemical properties of the intended product to go inside the bulk bag, such as:
• Required volume
• Weight of product to be contained
• Bulk density
• Contents flow characteristics
• Degree of aeration
• Particle shape and size
• Fill temperature
• Whether food grade is required
– The filling, handling, transporting, storing and emptying methods of the FIBC.
See below for a full rundown of terms for this popular packaging solution and their meaning. This will help to make informed decisions about the type of bag needed.
Class of IBC = Single trip, standard duty reusable or heavy duty reusable.
Safe working load (SWL) = this is the capacity of the bag and relates to the maximum weight or volume of product that the bulk bag can hold safely. It will usually be shown in kilograms and ranges from 250kg – 2000kg
Size = This will usually be shown in external dimensions and in centimetres.
Safety factor = Standard tonne bags will have a safety factor of 5:1, meaning a 1000kg capacity bag is guaranteed not to break, rip or tear with a weight of less than 5000kg. A safety factor of 6:1, is a bulk bag made out of thicker woven polypropylene body fabric and tested to a higher standard and is usually a heavy duty or multi trip FIBC.
Filling and discharging features
Plain base – This is a Standard flat base on the bottom of the bulk bag which makes it cuboid in shape. All standard builders bags will come with a plain base.
Lifting loops – Strong loops sewn into each corner of the bag which allows it to be picked up and manoeuvred by a fork lift truck. All FIBCs will come with 4 lifting loops.
Filling inlet – There are two types of filling inlets. They are;
Filling spout – A long tube which allows the contents to flow into the bag easily
Skirt top – Additional fabric at the top of the bag which can be secured around the filling device to prevent any loss of contents, ensuring that all the contents flow easily into the IBC.
Baffles = Additional internal baffles are sewn onto the corners of the bulk bag. This can help to stabilise the bag and make it more rigid and are specifically used for unstable or fluid products.
Discharge spout = A tube made out of woven polypropylene fabric is sewn onto the bottom of the bulk bag. This provides an easier flow of the contents out the bag when held over a hopper and the contents discharged.
Food grade = Food grade manufacturing relates to the conditions in which the FIBC has been manufactured and stored in before delivery to customer. These conditions are based on strict standards which allow the bag to be suitable for use for foodstuffs. Food grade bulk bags usually come with an internal polythene lamination. michael kors handbags for ladies