Shrink Packing: Multi-Pack and Display Packaging Solutions

What Is Shrink Packing?

Shrink packing is a packaging process in which items are wrapped in a polymer film and then exposed to heat, causing the film to shrink tightly around the product or bundle. The result is a secure, form-fitting wrap that holds items together, protects surfaces from dust and moisture, and provides a clean, professional appearance for retail display or shipment.

The process is widely used across consumer goods, food and beverage, pharmaceutical, and industrial sectors. Common applications include bundling multi-packs of cans or bottles, wrapping corrugated trays for retail display, overwrapping boxed products for tamper evidence, and unitizing groups of items for palletization.

Shrink packing works with several types of film, including polyolefin, PVC, and polyethylene. The choice of film depends on factors like the product’s sensitivity to heat, the desired clarity and gloss of the wrap, and whether the package needs to be food-safe. Regardless of the film type, the basic principle is the same: the film is loosely applied around the product, then passed through a heat tunnel or exposed to a heat gun, which activates the shrink properties and draws the film snugly against every surface.

How Shrink Packing Works

The shrink-packing process typically follows these steps:

1. Product arrangement: Items are grouped, stacked, or placed on a corrugated tray in the desired configuration. For multi-packs, this means arranging the correct number of units in the right orientation.
2. Film wrapping: A sheet or tube of shrink film is wrapped around the product group. On automated lines, an L-bar sealer or side-seal wrapper cuts and seals the film around each bundle.
3. Heat application: The wrapped bundle passes through a heat tunnel where hot air (typically between 250 and 400 degrees Fahrenheit, depending on the film) causes the film to contract uniformly around the product.
4. Cooling and inspection: After exiting the tunnel, the package cools and the film sets in its shrunken state. Operators or vision systems inspect for wrinkles, fish-eyes (small holes), and proper seal integrity.

The entire process takes only seconds per bundle on high-speed lines, making shrink packing one of the most efficient methods for creating multi-packs and preparing products for retail display.

Common Applications of Shrink Packing

Shrink packing is used wherever products need to be bundled, protected, or presented as a single unit:

• Beverage multi-packs: Six-packs, twelve-packs, and case packs of cans, bottles, and cartons are frequently shrink-wrapped onto corrugated pad trays.
• Retail display preparation: Products placed on a corrugated display tray are shrink-wrapped together for transit, then the film is removed at the store to reveal a shelf-ready display.
• Tamper evidence: Overwrapping individual boxes in clear shrink film provides visual evidence that the package has not been opened, which is important for health, beauty, and pharmaceutical products.
• Pallet unitization: Shrink film bundled around groups of cases on a pallet layer adds stability and weather protection during transit.
• Product protection: Shrink film shields products from dust, moisture, and surface scratching during warehousing and shipping.

In many of these applications, shrink packing works hand in hand with corrugated components. A die-cut corrugated tray provides structural support underneath the shrink wrap, while the film holds everything together. Getting the tray dimensions and score lines right is essential for the bundle to shrink evenly and sit flat on the shelf.

Shrink Packing and Sustainability

As brands look for ways to reduce packaging waste, shrink packing is evolving. Thinner, high-performance films reduce material usage while maintaining holding strength. Some manufacturers are transitioning to recyclable or bio-based shrink films. Additionally, corrugated trays used as the base for shrink bundles are fully recyclable and often made from recycled content, aligning with broader sustainability goals.

For some product categories, brands are exploring whether corrugated multi-pack carriers can replace shrink wrap entirely. President Container works with customers to evaluate these tradeoffs, designing corrugated solutions that balance material efficiency, production speed, and retail shelf impact.

Why Choose President Container for Shrink-Pack-Ready Corrugated Packaging?

President Container Group manufactures the corrugated trays, pads, and display bases that serve as the foundation for shrink-packed bundles. Our PIP (Pack It Perfect) co-packing division can also handle the shrink-packing process itself, bundling products onto corrugated trays and applying shrink film as part of an integrated packaging and fulfillment operation.

Our full-service approach means we design the corrugated tray, manufacture it, and pack the product, all from our Moonachie, NJ facility. This eliminates the coordination headaches of working with separate tray suppliers and co-packers, and it ensures that the tray dimensions, board grade, and scoring are optimized specifically for the shrink-packing process.