Clothing Definitions — warehouse and distribution terms from Apparel Search
Shrinkwrap is the clear, tight skin seen on bundled and packaged goods throughout the clothing business. It is a material made of polymer plastic film which, when heat is applied, shrinks tightly over whatever it covers, forming a seal. This page defines shrinkwrap, explains how the shrink tunnel and heat gun do their work, and covers its uses in apparel: protecting folded garments, bundling multipacks, sealing retail boxes, and stabilizing pallet loads with its stretch-film cousin.
Shrinkwrap is a material made up of polymer plastic, usually PVC with a mix of polyesters. When heat is applied to this material it decreases in size so that it forms a seal over whatever it was covering. Shrinkwrap is commonly found on CDs, DVDs and software packages, but can also be found as safety sealant on jars and bottles as well as to seal off exposed, soldered joints in electric wiring.
Commercial shrink wrap usually takes the form of a clear film applied to products to protect them from dust, pests, surface contamination and moisture. The shrinkwrap provides a tamper-evident seal that helps ensure freshness and discourage pilfering.
How shrinkwrap works
The molecules of plastic that make up shrinkwrap are in forced into a polymer state during manufacturing. At a microscopic level the material will look like a series of long, thin molecules lined up neatly in rows. Applying heat to these polymer molecules will increase molecular motion (meaning that they will vibrate against each other) and cause them to return to their natural state. The long, thin lines of molecules of the polymer will tangle tightly with each other, decreasing the volume of the material - producing the 'shrink' effect.
Polyethylene Definition (used for packing bags)
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Shrink film is manufactured by stretching the polymer while it is warm, which locks tension into the material. When the film is reheated — by a heat gun for small jobs or a shrink tunnel on a packing line — the polymer relaxes toward its original dimensions and pulls tight around the contents. In an apparel packing area the sequence is simple: the garment or bundle goes into a film bag or sleeve, a sealer trims and closes the open edge, and a short pass through the tunnel produces the finished, form-fitting package. Polyolefin films have largely replaced PVC for garment work because they shrink evenly, seal cleanly and avoid the brittleness and odor of older formulations.
For clothing, shrinkwrap does three jobs at once. It protects: dust, scuffing and light moisture are kept off folded knitwear and boxed goods through storage and shipping. It presents: a tight, glossy wrap signals a new, untouched product and lets the garment's color and packaging graphics show through. And it secures: bundled socks, underwear multipacks and accessory sets stay together as one retail unit, and a torn wrap is visible evidence of tampering. The trade-offs are environmental and practical — the film is a single-use plastic, and wrapping is an extra step with material and energy costs — so many brands now reserve it for products that genuinely need the protection or the shelf finish, and use plain polybags or paper bands elsewhere. The definition remains the reference point: a polymer film that heat shrinks into a seal over the goods it covers.
Shrinkwrap is a polymer plastic film — commonly PVC or polyolefin — that shrinks when heated, tightening around the product it covers to form a protective seal. The film is placed loosely over the item, sealed at the edges, then passed through heat that makes it contract to a snug fit.
It protects folded and packaged garments from dust and moisture, bundles multi-item packs, seals retail gift sets and hosiery cards, and gives products a tamper-evident, shelf-ready finish. On pallets, the related stretch wrap stabilizes carton loads for transport.
No, though the two are often confused. Shrinkwrap is shrunk by heat around individual products or bundles. Stretch wrap is a clingy film stretched mechanically around pallet loads; it is not heated and does not shrink to a product's shape.