The film route affects sealing temperature, tunnel temperature, pack strength, clarity, perforation, presentation and running speed. A machine that works well with one film may need adjustment or a different configuration for another.
POF film applications
POF is commonly used where clarity and retail presentation are important, especially for individual products, boxes, books and multipacks that need a neat finish.
PE film applications
PE film is often used for heavier multipacks, bottle bundles, trays and transit packaging where strength is more important than a fine retail presentation seal.
PVC and sleeve material applications
PVC and sleeve materials are often used for bottle labels, neck bands and capsule applications where the shrink is around part of the container rather than an outer bundle wrap.
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Frequently asked questions
Which film is best for shrink wrapping machines?
There is no single best film. The right material depends on pack weight, finish, clarity, strength, line speed and product shape.
Can one heat tunnel run PE, POF and PVC?
Some tunnels can be configured for different films, but temperature range, airflow, conveyor speed and product stability need to be checked.
Why does film type affect output speed?
Film thickness and shrink characteristics affect sealing dwell, tunnel temperature and conveyor speed, so real output should be checked against the product.