FIBC ( Flexible intermediate bulk containers ) /Bulk Bag Classifications (A, B, C, and D)
FIBCs ( Flexible intermediate bulk containers ) / Bulk bags are classified according to one of four types: Type A, Type B, Type C and Type D. The types of bags are defined by the construction of the bulk bag, the nature of their intended operation and associated performance requirements.The information below identifies which type of FIBC/Bulk bag is appropriate depending on the sensitivity to ignition of the product being packaged, and of the surrounding atmosphere.
The sensitivity to ignition of the product being packaged, i.e. the bulk product, is defined by its minimum ignition energy, MIE. Surroundings are classified in increasing sensitivity to ignition by electrostatic discharges as non-flammable, explosive dust atmosphere, or explosive gas or vapor.
Type A FIBC (No Electrostatic Protection)
Are made from standard polypropylene or other non-conductive material. Static electricity is generated as products move over the inside surface of bulk bags when they are filled or emptied.
As there is no static protection provided by Type A FIBC, it is essential that they are not used to store or transport combustible materials, or used in flammable or combustible environments.
Type B FIBC (Surface Breakdown Voltage of <6kV)
Are similar to Type A FIBC in that they are made from standard polypropylene or other non-conductive material. Like Type A bulk bags, Type B bulk bags do not have any mechanism for dissipating static electricity. The difference is that Type B bulk bags are made from materials that have a low breakdown voltage to prevent the occurrence of highly energetic, and dangerous propagating brush discharges (PBD). Although Type B FIBC can prevent PBD, they cannot be considered antistatic FIBC because they do not dissipate electrostatic charge. Normal brush discharges can still occur, which can ignite flammable solvent vapors.
Type C FIBC (Electrically Conductive or Groundable)
Are also known as conductive or groundable FIBC. Originally they were made from entirely conductive materials. Groundable Type C FIBC are more commonly made from non-conductive polypropylene interwoven with conducting yarns, normally in a grid pattern. The interconnection of conductive yarns and the connection to ground or earth are critical to the safe use of Type C FIBC. As with any manual operation, ensuring interconnection and grounding of Type C FIBC is subject to human error.
Type D FIBC (Static Dissipative)
Type D FIBC are also called antistatic bulks bags They are made from static protective fabric designed to safely prevent the occurrence of incendiary sparks, brush discharges and propagating brush discharges, without the need for a connection from the bulk bag to ground or earth. As CROHMIQ Type D bulk bags protect against incendiary sparks, brush discharges and propagating brush discharges, CROHMIQ can be used safely to package combustible products and for handling products in combustible and flammable environment.
Palmetto Industries is a select licensee of Crohmiq fabric, all crohmiq FIBCs/Bulk bags are tested in accordance with IEC Standard 61340-4-4 2005
FIBC Bag Styles
4 panel Bulk bag
The 4 panel bulk bags have seams along 4 separate pieces of fabric that are sewn together to construct the body of the bag; as well as having one top and one bottom panel sewn in. The bags will tend to hold their shape better and are well suited for stacking.
Duffle Top Bulk bags
What is a duffle top? A typical duffle top is usually around 30” in height. It is a “skirt” that is sewn to the top of a bulk bag. A typical duffle top will also come with two polypropylene web ties to allow the user to secure the duffle closed. Duffle tops are great for allowing the user full access to the product as well. Duffle top bags can accommodate a wide variety of filling machines and processes. Duffle tops can be added to any bag style (circular, u-panel, or 4 panel).
Circular Bulk Bag
Circular bags are constructed from tubular fabric that has been woven on a circular loom. The fabric is woven into a continuous tube and is then cut to the correct height. Because there are no side seams the circular bags are great for fine and hydroscopic products. The circular bag is also a great option for fork lift operators, the rigid loops allow for easy lifting without the need for additional help. When it comes to cost saving the circular bag is the best, because they are less labor intensive to make.
FIBC Baffle Bag by Palmetto Industries
What is a baffle?
Baffles are pieces of fabric that are sewn to the inside corners of a bag to help maintain its cube shape once filled. The baffles are made with holes to allow the product to flow freely throughout them. Baffles also help prevent the bags from bulging, this helps make the bag stand up straighter and in turn allows the bag to be more efficient in their use of space. This also allows for and increases in bag capacity by 25-30 percent, which means significant cost saving can be achieved through transportation, storage, packaging, and handling.
- Increased stability
- Increased stack ability
- Maximum utilization of storage space
- Maximum utilization of storage space
- Causes and increase in capacity by 25-30 percent
U-Panel bulk bag
The u-panel bulk bags have (1) continuous piece of fabric for the side, bottom, and opposite side panel that creates the “U” shape. The remaining two sides and top panel have to be sewn during the construction of the bag. This construction reduces potential leak points on the bottom and reduces stress on the seams.
|Spout Top||Duffel Top||Extended Top||Open Top||Sleeve Lift||Stevedore Straps|
|Spout Bottom||Plain Bottom||Full-Open Bottom Multi-Flap||Full-Open Bottom Single-Flap||Tubular bag|