Packaging is a crucial aspect of product distribution and protection, typically divided into primary and secondary packaging. Primary packaging is the material that directly encases the product, providing a barrier against contamination and damage. It is the first layer of protection and often includes bottles, cans, blister packs, or wrappers. Secondary packaging, on the other hand, is used to group primary packages together, facilitating handling, transportation, and storage. It includes boxes, cartons, and shrink-wrapped bundles. Shrink tunnels are integral to the secondary packaging process, particularly in shrink wrapping. These machines apply heat to shrink film, which tightly conforms to the shape of the packaged goods. The process begins with products being wrapped in shrink film, followed by passage through a heated tunnel. The heat causes the film to shrink, creating a secure and tamper-evident seal around the products. Shrink tunnels offer several advantages, including enhanced product protection, improved stability during transport, and reduced packaging material usage. However, they also have limitations, such as the initial cost of equipment and energy consumption. Additionally, the process may not be suitable for heat-sensitive products, as the heat can potentially damage the items being packaged.