Bulk Bag Webbing Manufacturer and Supplier
Bulk bag webbing is the woven polypropylene strapping that forms the lifting loops, belt patches, and body reinforcement on an FIBC.
This single component determines whether a bulk bag can be lifted, moved, and stacked safely under load.
As a manufacturer and supplier of bulk bag webbing, Trunel Bags produces webbing built to carry real industrial loads, and we supply FIBC converters and bulk bag manufacturers across South Africa.
Webbing quality directly affects a bag’s Safe Working Load, or SWL. International standard ISO 21898 governs FIBC design and safety, so buyers sourcing webbing for their own FIBC production need consistent strength, not just consistent appearance.
What Bulk Bag Webbing Does
We weave webbing from high-tenacity polypropylene tape, sometimes reinforced with polyester yarn, into flat strapping used for:
> Lifting loops, the load-bearing interface between the bag and a forklift, crane, or hoist
> Belt patches and body reinforcement that spread load stress across the fabric
> Bias straps and ties used to close inlet and outlet spouts
Loop and webbing construction, not just body fabric strength, determines a bag’s safety factor and lifting behaviour.
Built for Heavy-Duty Lifting
Manufacturers build industry-standard FIBCs to a minimum safety factor of 5:1, or 6:1 for multi-trip and dangerous-goods bags.
This means the loop and webbing assembly must withstand several times the bag’s rated Safe Working Load before failure.
Common SWL ratings across the industry run from 500kg up to 2,000kg per bag, with loop free length typically 25 to 30cm so it clears forklift tines without dragging the bag base.
We also manufacture and supply bulk bags and FIBCs, so we build the same load performance into our webbing that goes into our own FIBC range. In addition, we supply related agricultural products such as bale netting and silage sheeting.
Technical Specifications
Material Technology
> High-tenacity woven polypropylene tape.
> Optional polyester-yarn reinforcement for higher load or chemical/heat resistance.
> UV-stabilised for outdoor storage and handling.
Loop and Belt Configurations
> Standard 4-loop, cross-corner, and single/double-point loop constructions.
> Belt patch reinforcement available for higher SWL requirements.
> Bias strap/tie webbing for spout closure.
Benefits of Sourcing Bulk Bag Webbing from Trunel
Safety Factor You Can Verify
Consistent webbing strength gives converters confidence. They can build bags to a stated SWL and safety factor instead of over-engineering to compensate for variable input material.
Handling and Operational Efficiency
Correctly specified loops reduce mis-lifts, loop wear, and stitching failures. All of these cost time and product on a factory floor or in the field.
Compatibility Across Lifting Methods
Converters can configure webbing for forklift, crane, or hoist handling, supporting standard, cross-corner, or stevedore-strap lifting setups.
Applications
FIBC and Bulk Bag Manufacturing
Converters use webbing to construct lifting loops, belt patches, and reinforcement on bags rated from 500kg up to multi-tonne capacities.
Mining, Agriculture, and Chemical Sectors
Similarly, industries moving fertiliser, minerals, grain, and chemicals rely on correctly rated webbing to meet safe handling and, where relevant, UN dangerous-goods requirements.
Export and Logistics
Beyond that, bags built for export need webbing that holds its rated strength through repeated handling, stacking, and long transit times.
Why Trunel Stands Apart
Trunel manufactures webbing alongside our own FIBC range. As a result, we specify and test loop and belt webbing against real bag performance instead of treating it as a standalone commodity product.
We also work closely with converters to match webbing width, strength, and configuration to their specific SWL and safety factor requirements, and we back this with our in-house bulk bag manufacturing experience.
Frequently Asked Questions
Manufacturers use bulk bag webbing to build the lifting loops, belt patches, and body reinforcement on FIBCs. This component carries the load during lifting, so its strength directly determines the bag’s Safe Working Load.
Standard four-loop webbing runs vertically at each corner, which suits forklift or crane lifting. Cross-corner loops instead run diagonally across the bag. This spreads the load more evenly and helps the bag align automatically at fill stations, so many high-throughput filling lines prefer it.
SWL support depends on webbing width, weave density, and whether the manufacturer adds polyester reinforcement. Industry FIBCs commonly carry a rating between 500kg and 2,000kg.
Manufacturers commonly add polyester-yarn reinforcement to increase load capacity and improve resistance to heat and chemical exposure in demanding environments.