Container becomes a bulk carrier
Product moves without bags or pallets, which cuts packaging and loading labour on suitable dry cargo.
Container size
20 ft and 40 ft, standard height
Loading end
Fill spout, open end with bulkhead
Discharge end
Discharge spout, full-open door end
Bulkheads
Front and rear bulkheads, or rear only
Fabric
Woven PP, coated or with a PE film layer
Fixing
Suspension loops and tie points to the container
What it settles: Focuses on the two ends of the liner — filling and discharge — and on the container condition that decides whether a liner survives the load.
Best for: Dry, free-flowing product shipped in full container loads where the buyer wants no bags or pallets at the receiving end.
Not the answer when: The product is sharp, hot, wet or very fine and dusty with no way to control it, or the receiver cannot handle bulk discharge — bagged…
Confirm before quoting: Container size and internal condition, product and bulk density, loading and discharge method at both ends, whether the receiver tips the container, and the payload limit.
/ Overview & Principle
HOW THIS BAG IS BUILT
A container liner is not a bag. It is a liner cut and sewn to the internal profile of the container, fixed at the door end and at the far end, with a loading end and a discharge end built in. Bulkheads hold the product away from the doors during transit, and the door area is protected where the product presses against it.
Filling is usually by spout or conveyor through the loading end; discharge is by opening the discharge end and letting the product flow, or by tipping the container. The design work sits in the transitions — where the liner meets the corner posts, the door frame and the floor — because those are where liners tear or leak.
Operational summary:
A liner that turns a 20 ft or 40 ft container into a bulk carrier: it protects the cargo from the container and the container from the cargo, and it is filled and emptied through built-in ends.
/ Features
KEY DESIGN ADVANTAGES.
Protects both ways
The liner keeps the cargo clean and keeps the container floor and walls clean for the next load.
Fills through a standard spout
The loading end is sized to a spout or conveyor, so existing filling equipment can be used.
Folds down for return
Empty liners store and ship flat, so they can be sent ahead of the cargo.
Bulkheads keep the load off the doors
Front and rear bulkheads hold product away from the door area in transit, which is where a liner is pressed open.
Fit confirmed in your own container
A trial installation in a container you supply is the usual way to confirm the profile and fixing points before a full order.
/ 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.
- Container size
- 20 ft and 40 ft, standard height Internal profile is confirmed against the container type you actually load.
- Loading end
- Fill spout, open end with bulkhead Spout diameter follows the product and the filling rate.
- Discharge end
- Discharge spout, full-open door end Choice depends on whether the receiver tips the container or empties it in place.
- Bulkheads
- Front and rear bulkheads, or rear only Bulkheads keep the product off the doors in transit.
- Fabric
- Woven PP, coated or with a PE film layer The film layer is chosen for moisture and dust control.
- Fixing
- Suspension loops and tie points to the container Fixing points follow the container's own anchor points.
- Ventilation
- Vented versions for loads that release moisture Venting is added where condensation in transit is the risk.
- Printing & packing
- 1-2 colours; folded and baled Print is usually limited to handling instructions.
/ Applications
WHERE THIS FAMILY IS QUOTED.
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 | Typical liners are built for loads in the 20-27 tonne range for a 40 ft container, subject to the product's bulk density and the container's own payload limit. The limiting factor is usually weight rather than volume, so the loading plan is confirmed against the payload figure and the product density. |
|---|
2. How it is validated
| Testing | In-house checks cover liner dimensions against the container profile, seam and fixing point stitch counts, spout dimensions and the film layer where fitted. A trial installation in a customer container is the usual way to confirm fit before a full order. |
|---|
3. Limits
| Where it is not the answer | Not suitable for sharp or very hot product, for wet cargo, or for containers whose internal condition is unknown — a damaged floor or protruding fixings will tear a liner. Loading is slower than tipping loose product into a container, so it suits buyers who need protection rather than buyers who need speed. |
|---|
Selection & Purchasing Guidance
- Best For:
- Dry, free-flowing product shipped in full container loads where the buyer wants no bags or pallets at the receiving end.
- Consider Alternatives When:
- The product is sharp, hot, wet or very fine and dusty with no way to control it, or the receiver cannot handle bulk discharge — bagged cargo is then the better answer.
- Must Confirm Before Quoting:
- Container size and internal condition, product and bulk density, loading and discharge method at both ends, whether the receiver tips the container, and the payload limit.
/ 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.
1 / 6
-
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