Corrugated Trays and Die-Cut Formats

An overview of open corrugated tray formats, die-cut production methods, and their practical applications.

Corrugated trays represent a distinct category within rigid paper-based packaging. Unlike fully enclosed shipping boxes, they prioritize access, visibility, and efficient handling across supply chains that range from agricultural distribution to retail shelf-ready presentation.

What Corrugated Trays Are

A corrugated tray is an open-top or partially open container formed from corrugated board, distinguished from a full box by the absence of a permanent lid and by its comparatively shallow depth. While a standard shipping carton encloses its contents on all six sides, a tray exposes the top and sometimes portions of the sides, making the contents immediately accessible without unpacking.

The most common forms include the bliss tray, which is assembled from three separate pieces of board, and the one-piece folder tray, which is cut and scored from a single blank and folded into shape without adhesive or additional components. Wraparound trays are also widely used; they begin as a flat blank that is folded around a grouped product during automated packing. Each configuration offers different trade-offs between structural rigidity, assembly speed, and material efficiency.

Tray depths vary considerably depending on application. Shallow retail-ready formats may stand only a few centimeters tall, while agricultural trays designed to hold dense produce can be substantially deeper. The flute profile of the corrugated board — whether single-wall, double-wall, or a micro-flute grade — is selected to match the load requirements and the degree of surface smoothness needed for printing.

Die-Cutting Basics

Die-cutting is the process by which flat corrugated board is cut and creased into precise blank shapes that can then be folded into finished trays or custom packaging formats. A die — typically a wooden board fitted with sharp steel rule blades and softer creasing rules — is pressed against the board under significant force, simultaneously severing the material along cut lines and compressing it along fold lines without breaking the outer liners.

The geometry of a die-cut blank determines virtually every structural and functional characteristic of the finished tray. Ventilation holes, hand-holds, display windows, and perforated tear strips are all incorporated into the die design rather than added as secondary operations. This integration makes die-cutting particularly suitable for complex tray formats where multiple features must be positioned with high repeatability across large production runs.

Rotary die-cutting uses cylindrical dies mounted on a roll and is favored for high-speed, high-volume production of simpler shapes. Flatbed die-cutting applies pressure over the entire blank simultaneously and accommodates more intricate geometries or thicker board grades. The choice between these methods depends on run length, blank complexity, and the flute profile of the board being processed. The die-cutting process used to form trays is described at https://en.wikipedia.org/wiki/Die_cutting.

Common Tray Applications

Fresh produce distribution is among the most established uses for corrugated trays. Fruit and vegetable trays are designed to allow airflow around their contents, support stacking through the cold chain, and withstand humidity conditions that would compromise non-treated board. The open format also allows inspectors and buyers to assess product condition without disturbing the pack.

Beverage secondary packaging frequently employs corrugated trays to group canned or bottled products into retail-ready clusters. These trays are often combined with a thin film overwrap rather than a full corrugated lid, reducing material weight while maintaining bundle integrity through distribution. The tray base provides a rigid platform that protects container bases and prevents shifting on pallets.

Retail-ready packaging, sometimes called shelf-ready packaging, uses die-cut corrugated trays designed to move directly from the delivery vehicle to the store shelf with minimal handling. A perforated front panel tears away cleanly to expose products for consumer selection. Standards bodies such as FEFCO provide classification systems that help buyers and retailers specify compatible formats across different suppliers. Corrugated tray formats are catalogued in more detail at https://sites.google.com/emeryeps.com/vslpackaging/packaging/boxes/corrugated-trays.

Stacking and Display Considerations

The stacking strength of a corrugated tray depends on the board grade, the flute orientation relative to the load, and the geometry of the tray corners. Corner posts formed by folded board layers concentrate compressive load along vertical edges, which is the most structurally efficient path. Trays intended for high-stack cold-chain environments are typically specified with moisture-resistant treatments applied to the board or the adhesive, since corrugated board loses a significant portion of its compressive strength as relative humidity rises.

Ventilation cutouts present a tension between airflow and structural integrity. Each hole or slot removed from a side panel reduces the cross-sectional area available to carry compressive loads. Packaging engineers balance these competing demands by positioning cutouts away from corner load paths, limiting their total area relative to the panel, and sometimes reinforcing perforated edges with additional fold-over tabs.

For display applications, the printable surface area and the angle at which the product presents to a shopper are primary design inputs. Micro-flute and E-flute board grades offer a smoother outer liner surface that accepts higher-resolution print processes, enabling trays to function as both structural shipping containers and branded display units. Testing protocols defined by organizations such as ISTA and TAPPI provide standardized methods for evaluating whether a tray format will perform adequately through a defined distribution environment before it is committed to full production.