Why PE film changes the tunnel specification
PE shrink film is commonly considered for heavier packs, transit wrapping and multipack collation. It can be robust, but it also needs the correct heat exposure and airflow to produce a consistent pack without over-shrinking or leaving loose film.
The tunnel needs to suit film thickness, product height, pack density and output. A tunnel that works for light retail shrink film may not deliver the correct result on heavier PE film multipacks.
Sleeve sealing with PE film
In a sleeve sealing system, the PE film is wrapped around the pack and sealed before heat shrinking. The film width, pack dimensions and sealing jaw arrangement must be matched so the sleeve covers the product correctly and shrinks evenly.
For bottles and cans, pack stability through the tunnel is a key issue. The film must tighten without pulling the group out of shape or causing the pack to twist during discharge.
Details needed for advice
Provide the film type if known, the pack dimensions, product weight and target output. If you are changing film supplier or thickness, mention this because it can alter tunnel settings and final presentation.
Photographs of the current shrink result are useful where the issue is loose sides, film burn, poor overlap or weak pack containment.
Quote route and specification checklist
| PE film detail | Why it matters |
|---|---|
| Film thickness | Affects shrink behaviour, strength and dwell time. |
| Pack density | Heavy or dense packs need controlled heat exposure. |
| Tunnel airflow | Helps produce even shrink around open sides. |
| Belt transfer | Keeps the grouped pack stable during shrinking. |