Square footprint when filled
A 90 x 90 cm bag stays close to 90 x 90 cm at the top as well as the base, so container floor plans and pallet patterns can be drawn before the order is placed.
Size
Square base 85 x 85 x 85 cm to 105 x 105 x 120 cm
SWL / Safety Factor
500-1,250 kg at 5:1; 1,000-2,000 kg at 6:1
Top
Duffle, filling spout, or open top with separate cover
Bottom
Flat, discharge spout, or full-drop
Lifting loops
Four corner loops, single-trip or multi-trip, 50-70 mm wide
Fabric & coating
140-200 gsm woven PP, unlaminated or laminated
What it settles: Explains what the baffle or tie actually does to the filled footprint, quotes the volume penalty it carries, and gives the fill-height and stacking questions that…
Best for: Loads that must arrive as a cube: resin pellets, mineral powders and granules, and dry chemicals, where container fill rate and stack stability matter more than…
Not the answer when: The product is a fine dusty powder and shape does not matter (a U-panel or tubular bag with a liner is cheaper); the load is above…
Confirm before quoting: Product bulk density and angle of repose, the stacking height and how long it stands, whether lifting is by crane hook or forklift, and the container…
/ Overview & Principle
HOW THIS BAG IS BUILT
The body is sewn from four separate flat panels, and each vertical corner carries either an internal baffle web or a set of corner tie straps. The baffle is a folded fabric panel sewn across the corner so that it opens as the bag fills; the ties pull the corners toward the vertical axis. Both do the same job: they stop the body going circular under load and keep the side walls flat.
Loops are the usual four-corner type, sewn into the vertical seam with a double-row stitch and a folded loop base. Because the filled bag stays square, the load footprint is predictable, which is what container and pallet planning needs.
Baffles add fabric, cutting and sewing time compared with a plain four-panel bag, so a Q-bag is specified when the cube shape is worth paying for rather than as a default.
Operational summary:
A four-panel FIBC with internal baffles or corner ties that hold a near-cube shape whether the bag is empty or part-filled. Built for loads that have to stack square in a container or on a pallet without the bag slumping.
/ Features
KEY DESIGN ADVANTAGES.
Stacks without slumping
Flat side walls pass load straight down the stack instead of letting the bag bulge, lean and shift against its neighbours.
Cube shape when empty
Empty bags fold to a rectangular block, so warehouse space and palletising before the fill line are easier to plan.
More bags in the same container
Because the walls stay vertical the filled bags sit closer together, which usually means more units per 20 ft container than the same SWL in a tubular bag.
Shape held during filling
Baffles or ties keep the panel geometry while the bag is being filled, which reduces leaning bags and re-stacking on the fill line.
Baffle or ties, whichever the load needs
A folded fabric baffle gives the firmest cube; corner tie straps give most of the same effect at lower cost where the product is free-flowing.
/ 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
- Square base 85 x 85 x 85 cm to 105 x 105 x 120 cm The square base is the point of the design. Non-square bases can be quoted but lose most of the stacking advantage.
- SWL / Safety Factor
- 500-1,250 kg at 5:1; 1,000-2,000 kg at 6:1 Baffle and corner seams are the limiting element, so the SWL is fixed after the baffle layout is settled.
- Top
- Duffle, filling spout, or open top with separate cover Duffle with a tie is usual where the bag is closed after filling; a spout suits a fixed filling head.
- Bottom
- Flat, discharge spout, or full-drop Discharge spout diameter follows the product's angle of repose; fine powders need a wider spout than granules.
- Lifting loops
- Four corner loops, single-trip or multi-trip, 50-70 mm wide Loop width and stitch pattern are set by the SWL and the lift method, not by the bag size.
- Fabric & coating
- 140-200 gsm woven PP, unlaminated or laminated Lamination stiffens the panel and helps the baffle keep its fold; unlaminated fabric breathes better.
- Liner
- None, LDPE tube, LDPE gusseted, or PE film insert A gusseted liner follows the square section better than a round tube and is the usual choice for fine powders.
- UV stabilisation
- 50-300 kLy Set by the outdoor exposure the filled bag will see, not by the fabric weight.
- Baffle or corner ties
- Folded fabric baffle, or corner tie straps Baffles give the firmer cube; ties are lighter and cheaper where the product is free-flowing and shape is less critical.
- Printing & packing
- Up to 3 colours per side or unprinted; bales of 20-50 pieces or single-folded cartons Baffle seams cross the print area, so artwork is checked against the panel drawing before the plates are made.
/ Applications
WHERE THIS FAMILY IS QUOTED.
Food Ingredient Packaging
Bulk bags for flour, starch and sugar: hygiene-led construction, complete discharge, and a liner that protects the product rather than the bag.
Chemical Powder Packaging
Bagging industrial chemical powders - pigments, resins, additives, detergents - where the bag has to contain a fine, sometimes hazardous dust, resist…
Bulk Handling at Ports & Warehouses
Bulk bags used inside ports, warehouses and transhipment sheds, where the bag has to survive a long chain of handlers, stacking in…
/ Performance
PERFORMANCE, TESTING & LIMITS.
1. Performance & working envelope
| Rated range | Rated 500-1,250 kg SWL at 5:1 and 1,000-2,000 kg at 6:1 for single-trip use with a four-point crane or forklift lift. The envelope assumes a free-flowing to slightly cohesive product at 0.5-1.2 t/m3, filling through the top, and a level, dry floor for stacking. Practical stack height is limited by how the product compresses rather than by the bag: two to four high is typical for mineral and resin loads. These are typical values for the construction, confirmed per project against the product data and the sample. |
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2. How it is validated
| Testing | In-house checks on every production lot: panel and baffle dimensions against the cutting drawing, fabric weight by sample cut and scale, seam strength on a strip tensile tester, and a trial fill where the customer supplies product for sampling. Lot records are kept per run. Third-party testing arranged on request and quoted separately. |
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3. Limits
| Where it is not the answer | A baffle bag is the wrong answer when the product is dusty and dust control is the priority - a lined bag with a different closure does that more cheaply. Baffles take a small slice of usable volume, so a bag sized for a given weight of a low-bulk-density product may need to go up a size. The extra seams are also more places for a fine powder to work through, so fine free-flowing powders are quoted with a liner. Above roughly 1,500 kg the baffle seams become the cost driver and an internally braced four-panel bag may be the better route. |
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Selection & Purchasing Guidance
- Best For:
- Loads that must arrive as a cube: resin pellets, mineral powders and granules, and dry chemicals, where container fill rate and stack stability matter more than the last few percent of fabric cost.
- Consider Alternatives When:
- The product is a fine dusty powder and shape does not matter (a U-panel or tubular bag with a liner is cheaper); the load is above roughly 1,500 kg; or the bag is emptied on the floor after one short hop.
- Must Confirm Before Quoting:
- Product bulk density and angle of repose, the stacking height and how long it stands, whether lifting is by crane hook or forklift, and the container or pallet pattern the customer has to hit.
/ 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
Standard FIBC
THE OTHER BAGS IN THIS FAMILY.
Tubular FIBC
A seamless circular woven bag for free-flowing powders and granules; the lowest-cost standard construction where stackability is not the deciding…
View product →U-Panel FIBC
A flat-bottom FIBC whose body is one U-shaped panel joined to two side panels, giving a squarer filled footprint than…
View product →Circular FIBC
A seamless circular-woven bag closed with a round base, so free-flowing product empties completely and the body stays circular under…
View product →