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FIBC BULK BAG TYPES
FIBC Bulk Bags Come in Various Types Based on Their Static Protection Features (Type A, B, C, D) and by Their Intended Use.
Choosing the correct FIBC for your manufacturing environment is critical to ensure that the right bag is being used for its intended application. All Material Motion Type B, Type C, & Type D FIBCs are designed and tested in accordance with the IEC 61340-4-4 standard to ensure they are safe to use within your specific production process and manufacturing environment. Safe use of our products is paramount, and we pay particular attention to ensuring that the right bag is being selected and used correctly for its intended use.
Bag Types
Type A FIBCs
Type A FIBCs are made from non-conductive materials without any built-in mechanism for controlling and dissipating static electricity. Type A FIBCs should not be used to store or transport combustible products that are used in flammable or combustible environments.
There is no need to apply any additional labeling to designate a Type A FIBC in the manufacturing process. Since there is a labeling requirement, in accordance with the IEC – 61340-4-4 standard, a FIBC without a warning label designating the FIBC as a Type B, Type C or Type D should be assumed to be Type A FIBC without any static control properties built into the construction of the bag.
Type B FIBCs
Similar to Type A FIBCs, Type B FIBCs are manufactured using non-conductive materials without any built-in mechanism for controlling and dissipating static electricity. Type B FIBCs are manufactured from materials with a low breakdown voltage designed to prevent sparks & propagating brush discharges from occurring during the normal handling process. Type B FIBCs can be manufactured using uncoated fabrics or fabrics with a thinner laminated coating requiring a breakdown voltage of < 6kV.
Type B FIBCs must be labeled in accordance with the IEC 61340-4-4 standard.
Type B FIBCs can be fitted with Type L2 or Type L3 inner PE liners in accordance with IEC 61340-4-4. Liners can be constructed of a single layer film or constructed using co-extruded, multi-layered films that are bonded together in the manufacturing process.
Type C FIBCs
Type C (conductive) FIBCs are manufactured from conductive fabric or non-conductive fabrics that are interwoven with conductive yarns that form a grid within the FIBC framework. The conductive fabric and yarns must be interconnected with a RG<108 Ω and the FIBC must be grounded during all filling and emptying procedures. Lifting loops must also contain conductive yarns and have a RG<108 Ω (resistance to grounding point).
Type C FIBCs must be labeled in accordance with the IEC 61340-4-4 standard.
Type C FIBCs may be used in environments where flammable vapors and gases are present or with combustible dusts that have an MIE less than or equal to 3 mJ.
Type C FIBCs can be fitted with Type L1, Type L1C & L2 inner PE liners in accordance with IEC 61340-4-4. Liners can be constructed of a single layer film or constructed using co-extruded, multi-layered films that are bonded together in the manufacturing process.
Type D (CROHMIQ™) FIBCs
Type D CHROMIQ™ FIBCs are manufactured using non-conductive fabrics that are interwoven with quasi-conductive fibers located approximately 20mm apart in the warp direction of the fabric. The yarns do not need to form a grid pattern or be interconnected in order to be effective in dissipating the static charge.
The interwoven fibers safely and effectively dissipate the static electrical charge into the surrounding environment through a low energy corona discharge, therefore, FIBCs produced with CHROMIQ™ fabrics do not need to be grounded during the filling and discharging process.
Type D FIBCs must be labeled in accordance with the IEC 61340-4-4 standard.
Type D FIBCs may be used in environments where flammable vapors and gases are present or with combustible dusts that have an MIE less than or equal to 3 mJ.
In accordance with the IEC-61340-4-4 standard, Type D FIBCs can be fitted with Type L2 inner PE liners. Liners can be constructed of a single layer film or constructed using co-extruded, multi-layered films that are bonded together in the manufacturing process.
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