L sealer machine UK
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Film guide
Shrink film perforation guide
Perforation allows trapped air to escape during shrinking. Without the right escape path, packs can balloon, wrinkle or fail to shrink tightly.
Key checks for shrink film perforation guide
Perforation allows trapped air to escape during shrinking. Without the right escape path, packs can balloon, wrinkle or fail to shrink tightly.
- Ballooning packs
- Wrinkled corners
- Film clarity
- Tunnel temperature
- Film type and thickness
Why air escape matters
As film shrinks in the tunnel, air inside the pack needs a route out. The right perforation can improve presentation and reduce ballooning.
Perforation method
Film may be supplied with perforation or perforated on the machine depending on equipment and film route. The best option depends on product and finish.
Testing real packs
Pack shape, speed, tunnel setting and film thickness all change how air escapes. Sample testing is the best way to confirm quality.
Details to send for a useful recommendation
| Product range | Largest and smallest pack dimensions, product weight, photographs and notes about pack stability. |
|---|---|
| Production target | Required packs per minute, daily volume, shift pattern and expected changeover frequency. |
| Film and finish | Preferred film type if known, presentation standard, seal position and any retail requirements. |
| Site information | Available floor space, power, compressed air, access route, conveyor height and downstream packing method. |
FAQ
Shrink film perforation guide FAQs
Do all shrink packs need perforation?
Many do, but it depends on film, pack and machine route.
Can too much perforation be a problem?
Yes. Excessive perforation can affect strength or presentation.
Who should confirm the perforation route?
The machine and film supplier should review it with the product samples.
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