Quick answer: Specify a box liner as part of a complete shipping pack-out. Confirm carton fit, payload, liner construction, closure, any coolant and the route conditions before asking for temperature performance or selecting a reference size.
Start with the carton and payload
Measure the usable internal length, width and height of the carton. Describe the payload, its packed arrangement and any space needed for cushioning, inserts or coolant. Include the liner closure arrangement rather than assuming the liner will be left open.
A reference liner size does not confirm the fit of a specific carton. Ask for a drawing or sample and check it with the actual payload. Record whether the supplied dimensions describe the liner before folding or the usable space after it is fitted.
Choose a construction to evaluate
New Solution lists reflective VMPET surfaces combined with PE bubble or EPE foam for its box liners. The listed options include VMPET/bubble/VMPET and VMPET/EPE foam/VMPET, with custom dimensions and a folding design.
Use the material description to define the configuration to be evaluated. Confirm insulation-layer thickness, seam or edge arrangement, folding and closure. Do not assume that two liners with a silver surface have the same construction or perform identically in the same carton.
Describe the temperature objective and route
State the payload’s required temperature range and the expected journey, including handling or delay conditions that matter to the shipment. Identify the ambient profile to be used for evaluation. If coolant is involved, define its type, amount, placement and preparation as part of the pack-out.
A hold-time statement without those conditions is difficult to compare. The result belongs to the evaluated packaging configuration and profile, not to the liner alone. Avoid carrying a result from a different carton, payload or route into a new order.
Test the complete packaging system
ISTA’s thermal guidance covers the design and qualification of insulated shipping containers using defined thermal profiles. Its thermal standards overview is a starting point for discussing an appropriate evaluation with a packaging test provider.
Record the carton, liner, payload, closure, coolant where used and test conditions. Agree the measurement and acceptance criteria before testing, and retain the configuration record with the results. A change to a material or packing step should be reviewed for its effect on the approved arrangement.
Send a complete liner enquiry
- Carton internal dimensions and payload arrangement.
- Proposed liner construction and insulation thickness.
- Closure, folding and packing sequence.
- Target temperature range, journey duration and ambient profile.
- Coolant plan where applicable.
- Required test documentation and sample approval procedure.
- Quantity, destination and delivery requirements.
For a regulated or pharmaceutical application, include the relevant qualification requirements separately. A general-purpose liner description is not evidence of suitability for every regulated shipping process.
Frequently Asked Questions
How long will an insulated liner maintain temperature?
There is no single duration for every carton and payload. Evaluate the complete pack-out under an agreed temperature profile and acceptance criterion.
Is bubble construction interchangeable with foam construction?
Confirm the proposed construction, fit and performance before substituting. A shared reflective appearance does not establish equivalent behavior.
Can a liner be used without coolant?
That decision depends on the payload, temperature objective and route. Define the intended pack-out and validate it; do not infer suitability from the liner material alone.
Related Products and Guides
Read next: Thermal Pallet Covers: Sizing and Performance Checklist.
Discuss Your Packaging Specification
Sources
Published by New Solution. This guide supports preparation of a purchasing brief. Product claims and suitability are confirmed against the selected order specification and supporting documents.