Predictable filled footprint
Faces are cut to fixed dimensions, so a filled bag keeps a rectangular plan that palletising and container-loading plans can be built around.
Size
Height 60-230 cm; plan 80 x 80 cm to 110 x 110 cm
SWL / Safety Factor
SWL 500-2,000 kg at SF 5:1; SF 6:1 available
Top
Open top, duffle, filling spout with or without cover, skirt with drawcord
Bottom
Flat, discharge spout, full-open duffle
Lifting loops
Four corner loops, corner loops with cross-corner, full-length corner loops
Fabric & coating
160-230 g/m2 woven PP, uncoated or laminated, optional anti-slip finish
What it settles: Explains what four-panel assembly actually changes — cut panels, corner seams, loop attachment — and sets the extra fabric and sewing against the shape control it…
Best for: Loads where the filled bag must keep a rectangular footprint for palletising or container loading, and where print on all four faces is part of the…
Not the answer when: Fabric and sewing cost dominate and shape control does not matter (tubular), when the filled bag must stay cube-shaped while stacked (baffle), or when the plan…
Confirm before quoting: Filled plan and height, SWL and safety factor, filler and discharger dimensions, lifting method, product bulk density and temperature, and outdoor exposure in months.
/ Overview & Principle
HOW THIS BAG IS BUILT
Four body panels are cut to a fixed width and height and joined at four vertical corner seams. Because each face is a separate piece, the plan can be set independently — a 100 x 80 cm bag and a 90 x 90 cm bag are equally routine — and the base is set in as a separate flat or duffle panel.
Corner seams are double-row chain stitched with folded edge tape, and the base seam carries a reinforcing patch where the loops meet it. Lifting loops are sewn into the top seam or, on heavier ratings, run down the corner seam as full-length loops with a saddle stitch at the base.
Panel-by-panel assembly costs more sewing than a tubular body and uses more fabric at the same rated load. That is the trade for shape control and print registration.
Operational summary:
A four-panel FIBC is built from four separate body panels joined at the vertical corners, giving the tightest dimensional control in our woven polypropylene range. It is the family to choose when a filled bag has to keep a rectangular footprint and print square on every face.
/ Features
KEY DESIGN ADVANTAGES.
Consistent print registration
Each side is a flat panel rather than a curved tube face, so logos and handling marks print square on all four faces.
Independent width and depth
A 100 x 80 cm plan is as easy to make as 90 x 90 cm, which a tubular body cannot offer.
Straight corner loop attachment
Loops sewn into the corner seam spread lift load along a straight seam rather than across a curved one.
Easier to line
A square body takes a form-fitted PE liner with fewer folds, so liner film is less likely to crease at the corners and trap product.
Base set in as its own panel
The base is a separate set-in panel, so a discharge spout or a full-open duffle can be specified without changing the four body panels.
/ Construction & Performance
WHAT DECIDES THE SPECIFICATION.
5 points decide how this bag is specified. Use the arrows, the dots, or a swipe.
/ Configurations
CUSTOM CONFIGURATIONS & SIZING.
- Size
- Height 60-230 cm; plan 80 x 80 cm to 110 x 110 cm Confirmed per project against your pallet or container plan. Non-square plans are routine.
- SWL / Safety Factor
- SWL 500-2,000 kg at SF 5:1; SF 6:1 available Safety factor is fixed before loop and seam selection; changing it later reopens the design.
- Top
- Open top, duffle, filling spout with or without cover, skirt with drawcord Spout diameter and skirt height are set to your filler head.
- Bottom
- Flat, discharge spout, full-open duffle Spout discharge adds a base seam to inspect; duffle discharge empties faster.
- Lifting loops
- Four corner loops, corner loops with cross-corner, full-length corner loops Loop height follows the hook or forklift frame geometry you actually use.
- Fabric & coating
- 160-230 g/m2 woven PP, uncoated or laminated, optional anti-slip finish Coated fabric for moisture and dust control; anti-slip finish helps stack stability.
- Liner
- No liner, loose PE liner, form-fitted liner with tie or tab fixings Liner thickness and closure method depend on the product and your dust limits.
- UV stabilisation
- Standard package; extended package for long outdoor exposure State outdoor exposure in months at the destination.
- Printing
- Up to 4 colours per face on all four faces, plus handling marks Flat panels allow tight registration; send artwork as vector files.
- Packing
- Baled on pallets, cartons, or compressed bales Packing method is chosen for container fill and warehouse handling.
/ Applications
WHERE THIS FAMILY IS QUOTED.
Cement & Dry Mortar Packaging
Bagging cement and dry mortar at a batching plant or a dry-mix line: the bag has to survive a dusty, abrasive fill,…
Chemical Powder Packaging
Bagging industrial chemical powders - pigments, resins, additives, detergents - where the bag has to contain a fine, sometimes hazardous dust, resist…
/ Performance
PERFORMANCE, TESTING & LIMITS.
1. Performance & working envelope
| Rated range | Typically rated from 500 kg to 2,000 kg SWL at a 5:1 safety factor, filled through an open top or spout and lifted by four corner loops from a single hook or a forklift frame. These figures assume an evenly filled, free-standing bag on level ground, no sharp edges inside the load and handling with the bag hanging free. Stack height, outdoor exposure and product temperature reduce the working envelope and are confirmed per project. |
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2. How it is validated
| Testing | Every batch is checked in-house: fabric weight and weave, stitch count at the corner seams, sample seam pull, finished dimensions, and loop pull on a sample bag, plus a trial fill on the line where the customer's product is available. Third-party testing is arranged on request and quoted separately. |
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3. Limits
| Where it is not the answer | Not the cheapest body at a given load — a tubular bag uses less fabric and less sewing for the same SWL. Not the right answer where the bag is expected to flex in use, where an internal baffle is needed to hold a cube, or where the plan is close to circular. Wide plans at high loads lengthen the corner seams quickly and can cost more than another construction. |
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Selection & Purchasing Guidance
- Best For:
- Loads where the filled bag must keep a rectangular footprint for palletising or container loading, and where print on all four faces is part of the brand requirement.
- Consider Alternatives When:
- Fabric and sewing cost dominate and shape control does not matter (tubular), when the filled bag must stay cube-shaped while stacked (baffle), or when the plan is roughly circular.
- Must Confirm Before Quoting:
- Filled plan and height, SWL and safety factor, filler and discharger dimensions, lifting method, product bulk density and temperature, and outdoor exposure in months.
/ On site
SEEN ON SITE.
Loading, lifting and standing full — the working conditions the specification is written for. Use the arrows, or drag the rail.
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1000 x 625 px
Filled at the bagging line -
1000 x 625 px
Handled under the base -
1000 x 625 px
Lifted on the loops -
1000 x 625 px
Standing full in a yard -
1000 x 625 px
Base and seams after a load -
1000 x 625 px
Baled and stacked in the warehouse