Pack pattern and collation

Sleeve sealer pack pattern guide

A guide to pack patterns, product collation and bundle stability before confirming a sleeve sealer, PE film and shrink tunnel route.

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The pack pattern determines more than the pack count

A sleeve sealer pack pattern sets the product arrangement, support format, film width, tunnel loading and the way the finished bundle will be handled after cooling.

Two packs with the same number of products can behave differently if one is tray-supported and the other is trayless, or if the centre of gravity, product height or base friction changes. For this reason the pattern should be trialled as a physical bundle rather than assumed from a product count.

Pack pattern checks before a trial

Pack pattern inputs for sleeve sealing
Input	Why it matters	Typical evidence
Rows and lanes	Determines finished bundle width and product control.	Planned layout sketch or sample arrangement.
Product height difference	Mixed heights can create unstable tunnel loading.	Measured sample set and worst-case bundle.
Tray, pad or trayless support	Changes base friction, product support and transit strength.	Support material sample and finished-pack objective.
Transfer direction	Can change whether products open up or compress before sealing.	Upstream conveyor direction and side guides.
Downstream handling	Determines whether cooled pack integrity is sufficient.	Manual handling, accumulation, case packing or palletising details.

Common pack pattern mistakes

Selecting a machine from product count alone.
Ignoring the pack orientation used by the upstream conveyor.
Trialling only the easiest product rather than the tallest or least stable combination.
Checking the bundle before cooling but not after downstream transfer.
Changing tray or pad material after the film and tunnel recipe have been approved.

Questions buyers ask about pack patterns

Can a sleeve sealer run different pack patterns?

A sleeve sealer may run more than one pack pattern when the machine, collation, guides, film width and tunnel settings are suitable for the full format range.

The practical answer should be confirmed with a format matrix and representative boundary samples.

Should the trial use the real tray or pad?

Yes. The real tray, pad or support material should be used wherever possible because support stiffness, friction and edge height can change the way the bundle seals, shrinks and handles.

Changing support material after approval may require further film and tunnel checks.

Related guidance

Continue the sleeve sealer specification route

These pages connect this guide with machine selection, film, tunnel, collation and enquiry preparation.

Product collation

Control product grouping before sealing.

Tray, pad or trayless

Compare support formats.

Multiple pack sizes

Plan a reliable format matrix.

Multipack shrink wrapping

Select the multipack wrapping route.

Bundle quality acceptance

Define how the finished bundle is judged.

Request a quote

Send samples and pack pattern data.

Lancing UK specification support

Turn this guidance into a practical sleeve sealing recommendation

Send product dimensions, pack pattern, film information, photographs and target output. Lancing can review the sleeve sealer, PE film, shrink tunnel and conveyor route.

Send project details Open checklist

Give each bundle arrangement its own handling and acceptance record

Show the proposed product arrangement with a drawing or clearly identified sample. Include product orientation, any tray or pad and the way the group is formed before wrapping. Ask which guides, supports or operating steps are proposed for that pattern.

If more than one pattern is required, record the differences and the associated changeover tasks. Keep the approved output and the tested formation sequence together so an alternative pattern is not introduced on the strength of a similar product count alone.

Pattern reference: Identify the arrangement and orientation of each product in the bundle.
Formation check: Assess how the intended group is assembled and passed into the wrapping stage.

Can two patterns with the same product count be treated as equivalent?

Assess the actual arrangements and their handling requirements. Ask whether different tooling, adjustments or acceptance checks are needed and retain a separate format reference where appropriate.