Sleeve applicator specialists — UK supply, installation and support 01494 623015 sales@lancinguk.com

Tunnel setup

Shrink Tunnel Temperature and Steam Settings

Tunnel settings should be treated as a controlled process. Sleeve material, sleeve thickness, container shape and line speed all affect the temperature or steam profile needed for a clean finished pack.

TemperatureSteamDwell timeLine speed

Process control

Balance heat with line speed and dwell time.

A pack moving faster through the tunnel has less time to shrink. The answer may be tunnel length, zoning, steam flow or line speed, not simply increasing the set point.

  • Line speed
  • Tunnel length
  • Heat zones or steam volume

Pack protection

Avoid overheating the container or product.

Lightweight bottles, heat-sensitive products and delicate caps may limit how aggressive the tunnel can be. The finished sleeve must be achieved without damaging the pack.

  • Bottle deformation
  • Cap or closure sensitivity
  • Condensation or drying requirements
  • Choosing only by machine speed before testing the real container and sleeve
  • Ignoring pack stability, side guides and conveyor transfer points
  • Using the wrong tunnel route for the sleeve material or bottle shape
  • Leaving cut length, lay-flat or perforation tolerance until after ordering
  • Forgetting coding, inspection, accumulation and downstream packing space

Avoid poor fit

Common issues to check before ordering.

Small pack or sleeve differences can change the correct applicator, mandrel, conveyor and tunnel arrangement. These checks help prevent a machine being chosen on headline speed alone.

Quote details

Information that helps shortlist the correct sleeve applicator route.

For a useful recommendation, send the container dimensions, filled weight, sleeve material, lay-flat, cut length, target output, photos or drawings, and where the sleeve needs to sit on the pack. If the project is going into an existing line, include available conveyor height, line direction, utilities and footprint.

  • Container diameter, height, shoulder shape and filled weight
  • Sleeve material, lay-flat, cut length, perforation and artwork position
  • Required output in bottles per minute or packs per hour
  • Tunnel choice, utilities, conveyor height and available footprint
  • Changeover range, spare parts and operator access

Related pages

Useful related sleeve applicator pages.

These pages keep the search route connected to the right machine type, application and quote checklist.

Quote guide

Sleeve applicator quote checklist

Gather the pack, sleeve, output and layout data needed for a machine quote.

Open page →

Troubleshooting

Shrink sleeve troubleshooting

Review wrinkles, twist, tunnel issues and product handling problems.

Open page →

Quote

Contact Lancing

Send application details for a practical sleeve applicator shortlist.

Open page →

FAQ

Shrink Tunnel Temperature and Steam Settings questions

What temperature should a shrink tunnel run at?

There is no universal setting; it depends on film, sleeve size, container and tunnel type.

Should tunnel settings be recorded?

Yes. Recipes or setup records help keep repeatable quality during changeovers.

Does slower speed improve shrink?

It can, but it may reduce output and overheat some packs if other settings are not adjusted.

Project support

Send the pack, sleeve and output details for a practical shortlist.

Lancing can review the packaging format, sleeve material, shrink tunnel requirement and line layout before recommending the most suitable sleeve applicator configuration.

Send project details

Recipe control

Build a tunnel recipe from the film curve, dwell time and pack limit.

There is no universal temperature or steam setting for shrink sleeves. The process is the interaction of sleeve material, local shrink demand, container and closure sensitivity, tunnel length, conveyor speed, heat or steam distribution and the condition of the pack entering the tunnel.

Record the warm-up state and utility condition as well as the displayed settings. A recipe cannot be repeated if the steam supply, airflow, line speed or container temperature has changed without being noted.

Decision pointRecord before the trialEvidence after the trial
Starting dataFilm supplier curve, sleeve thickness, container geometry and pack limitsInitial recipe selected without exceeding known material or pack constraints
Dwell and rateTunnel length, conveyor speed and target good outputCooled packs meet criteria at the agreed sustained line condition
Heat distributionZone, airflow or steam-distribution settings and warm-up stateShoulders, corners, base and main panel shrink consistently
Pack protectionContainer, cap, liner, product and label sensitivityNo unacceptable deformation, leakage, marking or product effect
Exit conditionCooling, condensation, drying and downstream transfer requirementPacks are stable and suitable for coding, inspection or packing

Change one controlled variable at a time

When investigating a defect, retain a pre-tunnel sample and adjust one process variable within the agreed safe range. Record the previous and revised setting, speed and result. Multiple simultaneous changes make the cause difficult to identify.

Do not use extra heat to compensate for a twisted or incorrectly positioned sleeve. Correct the application fault before tuning the tunnel.

Record the complete route

For steam, include supply condition, extraction, drainage, condensation and drying. For hot air, include zone or airflow balance, conveyor support and the condition of recirculation or filters where applicable.

Use videos and measured cooled samples to show the recipe result at tunnel entry, exit and after the normal cooling or drying distance.

Continue the controlled project brief

Use the related pages to keep dimensions, samples, tunnel settings and acceptance evidence in one route rather than treating each decision in isolation.

Sleeve applicator quote checklist → Sample-testing guide → Send the project details →

Buyer questions

Build a tunnel recipe from the film curve, dwell time and pack limit. buyer questions

What tunnel temperature should be used for PETG?

Use the film supplier’s process guidance as a starting point, then qualify the actual sleeve, container and tunnel. A universal value would be unreliable.

Does reducing conveyor speed always improve shrink?

It increases dwell time but can also overheat the pack or reduce output. Treat speed and heat distribution as linked variables.

Why record the warm-up state?

A tunnel can behave differently before utilities and internal surfaces stabilise. Acceptance evidence should state when the readings were taken.

Should a recipe include drying?

Yes where steam or condensation affects the pack. The accepted result should reflect the condition at the downstream process, not only at the tunnel exit.