custom shrink sleeve

Resolve open custom shrink sleeve choices that still block a comparable quote: barrier need, neck finish, shipper board strength, and which test files the named film must carry. Accepting an alternative construction without those checks mixes two products on one price.

Specification table before a factory substitutes

These rows are check prompts, not published performance trophies. A factory must restate the same units on the quote. Paperboard caliper and edge crush test belong on the shipper line, not on the sleeve-film line, but both must be written if sleeved bottles leave in corrugated.

Open choice	What must be verified	When an alternative is acceptable
Barrier vs recycle reporting	Oxygen transmission rate and water vapor transmission rate if the fill is aroma- or moisture-sensitive; whether PETG or OPS is preferred for recycling reporting versus PVC for some shrink windows	Only if the buyer restates barrier need and the recycle-stream rule in writing. Mono-material first versus barrier when shelf life requires it is a buyer trade-off, not a site slogan.
Neck finish and contour	Neck finish (for example 28-400 or 38-400), whether the sleeve must clear or cover the closure, and diameters at shoulder, waist and base in mm	Only if the substitute film can run the same shrink ratio on that contour after a line trial
Shipper board strength	Paperboard caliper of any carton wrap, or edge crush test / burst of the corrugated shipper that holds sleeved bottles	Only if the sleeve RFQ and the carton RFQ stay on separate lines with their own quantity units
PETG vs PVC vs OPS	Duty, shrink ratio, gauge in μm or mil, optical need, and whether PVC is excluded by the buyer recycle policy	Only if the tunnel can run the new window and the buyer accepts the material trade-off
Plain vs printed	Color count, flexographic printing or gravure printing or digital, die line and rewind specification	Only if artwork status and extra costs are listed outside the piece price
Food-contact grade	Migration testing and the named regulation	Only if the substitute resin carries its own file, not a category letter

Limitation one: a PETG sleeve that finishes on a straight-wall bottle can leave voids on a handled jug if lay-flat width is copied. Limitation two: catalog shrink ratio often exceeds a cooler electric tunnel. Limitation three: mixing a sleeve-film price with a 32 ECT shipper price hides both true costs.

Test-file checklist to request from the named factory

Resin and construction sheet naming PETG, PVC or OPS, gauge, seamed or seamless, and whether the web is blown or cast.
Food-contact and migration testing file. FDA 21 CFR and, if required, EU 10/2011. The file must name the quoted film. This website does not hold a site-wide food-contact badge.
Print and rewind specification: color target, process, core diameter, and rewind specification. Missing rewind data is a frequent cause of applicator jams that get blamed on bad film.
Container drawing with neck finish and key diameters. A directory label is not this drawing.
If sleeved bottles ship in corrugated, the shipper sheet with paperboard caliper or edge crush test / burst. Do not treat that sheet as sleeve-film evidence.
Factory quality file if the buyer asks: ISO 9001 or BRCGS Packaging that names that plant. These are supplier files, not Shrink Sleeve Sourcing certificates.

Post-consumer recycled content claims attach to the named batch. Digital versus conventional print is recorded as a buyer choice on plate cost versus spot-color control. Return to the inquiry options or send the open specification list.

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