How to Fill a Cubitainer: A Practical Guide for Liquid Packaging
Filling a Cubitainer involves more than transferring liquid into an empty container. The Cubitainer, closure, outer carton, filling method and downstream handling should work together as one packaging system.
Before production begins, buyers should confirm the Cubitainer size, liquid characteristics, filling volume, closure type and whether the existing filling equipment can hold and position the container correctly.
For a new liquid or a new filling setup, sample filling is recommended before moving directly to larger-scale production.
What Should Be Confirmed Before Filling a Cubitainer?
Before filling starts, the packaging and filling conditions should be reviewed together.
Important information includes:
- Liquid type
- Target filling volume
- Cubitainer capacity
- Filling temperature
- Liquid viscosity
- Whether the liquid tends to foam
- Filling method
- Closure type
- Dispensing requirement
- Outer carton requirement
- Storage conditions
- Transportation conditions
A filling method that works for one liquid should not automatically be assumed suitable for another.
Water-like liquids, viscous products, reagents, detergents and industrial liquids may behave differently during filling.
For new formulations, the liquid should also be reviewed together with the packaging material and closure before bulk production.
Step 1: Prepare and Inspect the Empty Cubitainer
Before filling, inspect the empty Cubitainer and confirm that the correct container, neck and closure have been prepared for the project.
Check:
- Container body condition
- Neck position
- Neck and closure matching
- Folding condition
- Carton size if an outer carton is used
- Required filling volume
The Cubitainer should be opened and positioned so that the filling area and neck can be handled consistently.
If the project uses carton-supported filling, the matched carton should also be prepared according to the actual filling-line arrangement.
Do not assume that every Cubitainer size can use the same fixture or filling setup. A 5L, 10L and 20L package may require different handling because the filled weight and container dimensions are different.
Step 2: Position and Support the Cubitainer Neck
Stable neck positioning is important during filling.
The filling head should align correctly with the Cubitainer opening, while the neck area should remain stable enough for the filling operation and subsequent capping.
The required support method depends on the filling equipment and production setup.
For manual or semi-automatic filling, the operator may need to position the Cubitainer and neck before each filling cycle.
For an automated or customized filling system, the neck position, opening structure and filling head should be reviewed during machine design or setup.
Before ordering filling equipment, buyers should provide the actual Cubitainer and closure samples or accurate interface information whenever possible.
Step 3: Fill the Liquid Under Controlled Conditions
The actual filling process should be matched to the liquid.
Important factors include:
- Filling volume
- Filling speed
- Liquid viscosity
- Foaming tendency
- Filling temperature
- Pump or filling principle
- Required production output
A low-viscosity liquid may behave differently from ultrasound gel, detergent or another high-viscosity formulation.
The objective is not simply to fill the target volume. The process should also avoid unnecessary stress on the container, closure area or carton while maintaining a repeatable filling result.
If the buyer is changing from bottles, drums, rigid containers or another packaging format, a trial filling can help identify whether the existing filling method needs adjustment.
Step 4: Install the Correct Closure
After filling, the Cubitainer should be closed using the closure selected for the actual application.
Depending on the project, this may include:
- Screw cap
- Plastic tap
- Spout
- Connector
- Nozzle or other dispensing accessory
Closure selection should consider both sealing and how the liquid will be used after delivery.
For example, a package that will be emptied at once may use a different closure arrangement from a package that is repeatedly dispensed over several days or connected to downstream equipment.
Cubitainer with Screw cap
Cubitainer with Plastic tap
Cubitainer with Spout
Cubitainer with Nozzle
Step 5: Check the Filled Cubitainer Before Packing or Shipping
After filling and closure installation, the complete package should be checked before it moves to storage or shipment.
Typical review points include:
- Correct filling volume
- Closure position
- Visible leakage
- Container position inside the carton
- Carton condition
- Dispensing outlet position
- Package shape
- Handling condition
For a new packaging project, it is useful to observe the filled package over the expected storage period and under conditions that reflect the real distribution process.
The objective is to evaluate the entire system rather than only the empty container.
Liquid + Cubitainer + Closure + Carton + Filling + Storage + Transport
Can Existing Filling Equipment Be Used for Cubitainers?
Possibly, but this should be evaluated before production.
Whether an existing filling system can be used depends on:
- Filling head design
- Neck positioning
- Container support
- Filling method
- Filling volume
- Liquid viscosity
- Pump type
- Capping method
- Required production speed
Buyers planning to use an existing filling line can provide:
- Filling machine photos
- Filling machine videos
- Filling-head dimensions
- Current container samples
- Current closure samples
- Target Cubitainer size
This information can help determine whether the existing setup may be adapted or whether a different filling arrangement should be considered.
For new packaging projects, conducting a trial filling can help verify the complete packaging system before bulk production.
FAQ About Filling a Cubitainer
Can a Cubitainer be filled manually?
Manual or semi-manual filling may be possible depending on the liquid, filling volume, production quantity and closure method. The actual setup should be evaluated according to the project.
Does a Cubitainer need an outer carton during filling?
Cubitainers are commonly used together with matched outer cartons in LIQPACK packaging projects. Whether the carton is used as part of the filling setup depends on the filling method and production arrangement.
Can the same filling machine handle different Cubitainer sizes?
Possibly, but container dimensions, neck positioning, filling volume and fixture requirements should be checked for each size.
What information is needed before reviewing a Cubitainer filling project?
Provide the liquid type, filling volume, Cubitainer size, closure requirement, filling method, expected output and photos or videos of the existing filling equipment if available.
Should a sample filling be completed before a bulk order?
For a new liquid, new Cubitainer size or new filling setup, sample filling is recommended before larger-scale production.
Review Your Cubitainer Filling Project
If you are planning a new Cubitainer filling project, send us your liquid type, target volume, closure requirement and filling-machine information.
Photos or videos of your existing filling setup are especially useful when evaluating whether the packaging can work with your current production process.