overwrap

Overwrap is a form of secondary packaging consisting of a film or sheet that completely surrounds a product. It is applied around a primary package to protect contents, provide tamper evidence, and enable branding. Common overwrap materials include polyolefin and oriented polypropylene films, as well as PET and multilayer laminates. Films are typically clear or printed, allowing product visibility and advertising.

The wrapping is applied by an overwrap machine that wraps the film around the product and seals the seam with heat sealing or cold sealing, forming a continuous tube or a seal along one edge. Unlike shrink wrap, overwrap typically does not require heating to the point of shrinking; the film is retained at its original dimensions after sealing, though some processes use a wrap-around layout with a separate sealing step.

Overwrap is widely used for confectionery, bakery, and snack items, as well as multipacks of beverages, electronics, and pharmaceutical packaging. It provides tamper evidence when the film or seal is breached, as well as a barrier to moisture, dust, and handling. Design considerations include clarity for product visibility, graphics for branding, and barrier properties to extend shelf life. Recyclability and environmental impact are important factors; many overwrap films are not easily recyclable through standard streams, prompting development of mono-material designs or biodegradable options.

See also: packaging, tamper-evident packaging.