Automatic L sealer machines
Related guidance for comparing shrink wrapping machinery, film, output and installation requirements.
Shrink film selection
POF vs PE shrink film for L sealers
Film choice has a direct effect on seal quality, tunnel settings and finished pack appearance. POF and PE shrink films are both used in shrink wrapping, but they are not specified for the same reasons.
POF shrink film
- Often used for clear retail presentation packs.
- Suitable for many boxed goods, books, cartons and light products.
- Requires appropriate sealing and tunnel settings for a neat finish.
- Common with L sealer and chamber sealer applications.
PE shrink film
- Often used where pack strength is more important.
- Common in sleeve wrapping and grouped pack applications.
- Requires a tunnel suited to the film thickness and pack size.
- May be considered for heavier products, trays and multipacks.
Why the machine must match the film
The sealer, tunnel aperture, belt speed and heat control need to suit the film. A film that works on one pack format may give a poor result on another if heat or sealing conditions are wrong.
Specification summary
For a reliable recommendation, send product dimensions, photographs, required output, film preference, available floor space, power and compressed air details. Lancing UK can then check the correct machine aperture, heat tunnel size, conveyor layout and operator access before quoting.
FAQ
POF vs PE shrink film for L sealers FAQs
Is POF or PE better for L sealers?
POF is often used for clear presentation packs with L sealers. PE is more common for stronger grouped packs and sleeve wrapping.
Can one machine run both POF and PE?
Some machines may support more than one film type, but the specification and settings need to be checked.
Does film choice affect tunnel settings?
Yes. Film type and thickness affect temperature, dwell time, airflow and final pack appearance.
Related pages
Compare shrink wrapping machinery options
Use these related pages to choose the correct L sealer, chamber sealer, sleeve sealer or heat tunnel route.
Automatic L sealer with shrink tunnel
Related guidance for comparing shrink wrapping machinery, film, output and installation requirements.
L sealer machine price
Related guidance for comparing shrink wrapping machinery, film, output and installation requirements.
Shrink tunnel machine
Related guidance for comparing shrink wrapping machinery, film, output and installation requirements.
Shrink wrapping machines UK
Related guidance for comparing shrink wrapping machinery, film, output and installation requirements.
Contact Lancing UK
Related guidance for comparing shrink wrapping machinery, film, output and installation requirements.
Film selection
POF and PE film checks for L-sealer projects
Film choice changes the way an L-sealer performs. POF and PE can both be used in shrink wrapping applications, but they do not always behave the same in the seal area, tunnel or discharge. The supplied LU-SPL6 route lists POF / PE film compatibility, but each project should still confirm thickness, centre-fold width, shrink behaviour and pack finish.
For a fair comparison, test the film on the actual product. The acceptance criteria should include seal strength, corner appearance, clarity, trapped air, perforation needs, print or barcode visibility and whether the pack remains acceptable after cooling.
| Selection point | What to confirm | Why it matters |
|---|---|---|
| Centre-fold width | Calculate from product width, height and film allowance. | Too narrow causes tight feeding; too wide leaves excess film and poor appearance. |
| Thickness and seal behaviour | Confirm with the actual sealing wire or blade setup. | The same dwell and temperature may not suit every film. |
| Perforation and air release | Check whether air is trapped during shrinking. | Trapped air can cause balloons, wrinkles or inconsistent recovery. |
| Cooling and handling | Review the pack after it has cooled. | Some defects only become obvious once the film stabilises. |
Information to prepare before a quotation
- Film material and thickness.
- Centre-fold width and roll dimensions.
- Perforation requirement.
- Finished-pack clarity and strength requirement.
- Sample pack approval criteria.
Film width guide
Calculate the information needed for centre-fold film selection.
Perforation guide
Review trapped air and perforation requirements.
Seal quality
Check common finished-pack quality issues.
Buyer FAQs
Can one machine run POF and PE?
The LU-SPL6 route lists POF / PE compatibility, but settings and finished quality should be confirmed with the actual product and film.
What is centre-fold film?
Centre-fold film is folded on one edge so the product can be enclosed before the L seal is made.
Why is perforation sometimes needed?
Perforation helps trapped air escape during shrinking, which can improve pack appearance for some products.
Does film thickness affect speed?
It can affect sealing dwell, tunnel dwell and cooling, so output should be proven during testing.
What should be inspected after a film trial?
Check seal strength, clarity, wrinkles, dog-ears, trapped air, barcode visibility and handling after cooling.
Related guidance: LU-SPL6 detail · Shrink tunnel airflow · Sample testing
Film route evidence
POF and PE film checks before specifying an L-sealer
Film choice affects seal temperature, dwell time, tunnel behaviour, presentation and pack strength. POF and PE are not interchangeable assumptions; they need to be checked against the product, tunnel and finished-pack objective.
The enquiry should include film material, thickness, centre-fold width, roll size and whether perforation is needed. If printed film is being considered, registration and artwork tolerance should be reviewed before committing to the machine route.
| Point to confirm | What Lancing checks | Why it matters |
|---|---|---|
| POF film | Presentation packs, retail cartons and many boxed products. | Often considered where clarity and neat finish are important. |
| PE film | Some grouped or stronger transit-style packs. | May need different tunnel behaviour and sealing considerations. |
| Centre-fold width | Product width plus height plus clearance. | Controls whether the pack fits and where the seal lands. |
| Perforation | Air release during tunnel shrinking. | Can reduce ballooning or trapped air in suitable applications. |
Printed film registration guide
Review artwork, registration and barcode visibility.
Film width guide
Check centre-fold sizing.
Pack quality criteria
Define the required film finish.
Final specification FAQs
Can POF and PE use the same settings?
Settings should be confirmed for the film and product rather than assumed to be the same.
Why does centre-fold width matter?
It affects seal position, product coverage, film waste and whether the pack can enter the tunnel cleanly.
When should printed film be discussed?
Printed film should be discussed early because registration, artwork position and product detection can affect machine selection.
Useful next step: Send product dimensions, photos, film details and target output through the existing enquiry form so Lancing can check the L-sealer route before quotation.
Film evidence
Why POF and PE film choices should be proved on the actual pack
Direct answer: POF and PE film should be checked on the actual product because the same machine route can behave differently with different film thickness, centre-fold width, perforation, seal dwell and tunnel recovery. The film choice is part of the machine specification, not a consumable detail to resolve later.
Related guidance: Film seal-window testing · Perforation guide · Sample testing