Shrink Film

Shrink film selection is a balance between pack geometry, film construction, sealing and shrinking equipment, presentation, protection and material use. Polyolefin, PVC, LDPE and other shrink films are not interchangeable. The exact grade, gauge, width, fold, shrink behaviour and sealing window must suit the product and machine.

Reducing film without reducing performance

A lower gauge may reduce material per pack, but it must still seal and shrink consistently and survive distribution. The correct comparison uses the approved film weight per pack, rejected or reworked packs, energy and operating settings, product damage and any secondary packaging that can be removed or added. Recycled-content or recyclability statements need evidence for the exact film grade and intended collection context; the polymer family alone is not sufficient.

Changeover, maintenance and alternative methods

For repeatable changeover, record the film path, roll orientation, centre-fold position, perforation, seal-head setting, tunnel recipe and conveyor speed for each approved format. Inspect seal wires or jaws, belts, air circulation and temperature sensing as part of routine maintenance. Film tracking, static, blunt or contaminated sealing components and uneven tunnel air can create faults that appear to be material problems.

Common failures include open seals, burn-through, dog ears, balloons, holes, wrinkles, crushed products and uneven shrink. The trial record should separate film grade or gauge effects from machine settings and pack geometry. Where heat exposure, material use or presentation cannot be made acceptable, compare another film grade, paper or board banding, case packing, stretch wrapping or no secondary wrap, provided the alternative still meets containment, protection and logistics requirements.

Review the polyolefin heat-shrink film example

Review the polyolefin heat-shrink film example, browse bottles and pouches that may require secondary packing, and use the compatibility guide to plan a machine trial.

A film-reduction project should compare accepted packs, not nominal gauge alone. The useful result combines actual film weight, seal and shrink performance, machine settings, rejects, product protection and the verified collection context for the used film.

Calculate material use from accepted output

Use the roll specification and measured consumption to determine film used for accepted packs, then account for setup waste, rejected packs and rework. A candidate that is lighter per wrap but unstable in the tunnel may not reduce total use. Keep energy or carbon comparisons separate unless the method, boundary and data are genuinely comparable.

Do not detach the material claim from the collection route

Polyolefin, PVC and LDPE describe broad polymer families, not a complete end-of-life outcome. Record grade, additives, print, labels or tape, product contamination, whether the user is a household or business, and the realistic collection arrangement. Recheck the source and date before publishing disposal wording.

Buyer questions about film reduction

More questions about film presentation, sealing and tunnel performance

Film grade, gauge, fold, width, pack geometry and machine settings interact; a nominally similar roll is not automatically a direct substitute.

A film can shrink acceptably in a trial yet fail later through puncture, abrasion, split seals, loose containment or load movement. Approve the actual product bundle, seal, tunnel settings, cooling, case or pallet arrangement and route.