Four Core Constructions. One Standard of Proof.
A bulk bag is a structural pressure vessel. The construction you select determines whether your cargo retains its footprint, sifts through needle holes, or withstands high drop shocks in transit.
Baffle Bags
“The bag that refuses to bulge.”
A standard filled FIBC rounds outward, taking the shape of what is inside it. Every rounded bag in an export container pays freight for dead air. Baffle bags integrate internal perforated fabric baffles stitched corner-to-corner, restraining the walls to maintain a square, cubic form from filling through discharge.
Four Panel Bags
“Square geometry. Four independent load faces.”
Four Panel bags are manufactured from four separate vertical fabric pieces joined to a separate base panel. This four-seam structural design creates defined corners and flat planar walls that resist rounding significantly better than circular tubes.
Circular Bags
“Seamless tubular fabric. Built for powders.”
Circular FIBCs are manufactured from seamless tubular woven fabric produced directly on circular looms. With only top and bottom seams, the vertical body contains no stitches — dramatically reducing leak paths for fine powders and vulnerable points under lateral pressure.
U-Panel Bags
“The industrial standard. Built for heavy and dense loads.”
The U-Panel bag is the proven industrial standard for heavy-duty bulk shipping. A single continuous length of high-tenacity woven fabric forms the base and two opposite side walls in a 'U' shape, closed by two parallel side panels.
Construction Comparison Guide
Match your primary packaging requirement against the structural traits of our four bag geometries.
| Criterion | Baffle Bags | Four Panel | Circular | U-Panel |
|---|---|---|---|---|
| Shape Under Load | Square / Cubic | Semi-Square | Cylindrical / Rounds | Slightly rounded |
| Container Utilisation | Highest (15–25% gain) | Moderate | Standard | Standard |
| Powder Sift Resistance | Requires sift-cord | 4 vertical seams | Superior (0 side seams) | 2 side seams |
| Base Strength (Dense Loads) | Standard base | Standard stitched base | Standard base | Maximum (Continuous U-piece) |
| Branding Surface | Good | Best (4 flat panels) | Moderate (tubular) | Good |
Rapid Technical Evaluation & Quotation in 24 Business Hours.
Send us your target payload, bulk density, and handling setup. Our technical sales engineers validate your requirements and provide an itemized export quotation within one business day.