Shrink wrap is applied to items by placing the material over or around them, frequently using automated equipment, and then applying heat to cause the film to shrink tightly.
The process of applying shrink wrap involves several key steps and methods to ensure the film conforms snugly to the product. This method is widely used for packaging, protecting, and bundling items.
The Application Process
Based on the provided information, the application typically follows this sequence:
- Placement: The shrink wrap material is first positioned over or around the intended item. This can be done manually or, more commonly, often by automated equipment.
- Securing (Optional): Depending on the form of the shrink wrap, such as flat rollstock, it may be wrapped around the product. The edges can then be joined, often with heat sealing to tack the film together before the final shrinking step.
- Heating: Once the wrap is in place, heat is applied. The film is then heated by a heat gun or sent through a shrink tunnel or oven for shrinking. This heat causes the specially formulated film to contract tightly around the item.
Different methods and equipment facilitate the heating step:
- Heat Gun: Suitable for smaller items or manual applications, a heat gun applies localized heat to specific areas of the wrap.
- Shrink Tunnel: A conveyor belt system carries items through a heated chamber (a tunnel) where heat is evenly distributed, causing the wrap to shrink uniformly.
- Shrink Oven: Similar to a tunnel but typically used for larger or irregularly shaped items, providing controlled heat in an enclosed space.
Forms of Shrink Wrap
Shrink wrap can be supplied in several forms, impacting the initial application method. For example, flat rollstock is a common form that is wrapped around the product before sealing and heating. Other forms might include pre-formed bags or tubes.
In summary, applying shrink wrap is a straightforward process of covering an item and then using heat to activate the film's shrinking properties for a secure, protective fit.
