What is a Shrink Wrap Machine and How Does it Work?

Shrink wrap machines are an essential part of any business selling large amounts of goods. If you are interested in incorporating a shrink wrap machine into your business to improve the efficiency of your current packaging solution, read on below for information about exactly what a shrink wrapping machine is and how they work.


What is Shrink Wrapping?
Shrink wrapping is a procedure where an item is wrapped in a free sleeve or envelope of loose polyolefin shrink film, and heat shrinks the wrap and firmly around the product. The result is a tight, crystal clear wrap around your item.

Shrink wrapping is typically stronger than alternative wrapping solutions like overwraps or stretch wraps. They also conform more tightly to the product shape, usually simply producing a thin amount of plastic over the perimeter of your goods.

What is Shrink Wrapping Machinery?
Shrink wrapping can either be done by a heat gun or through dedicated shrink wrapping machinery. Heat gun shrink wrapping is most often done by individuals who have a very small number of products to shrink wrap each week. For businesses, a shrink wrap machine is vital to efficiently and quickly wrap as many products as they can in as short an amount of time as possible.

What kind of shrink wrapping machinery you need for your business will depend upon understanding your current wrapping process and what you want to achieve. You will need to think about the motivation behind the wrap, how quick is the generation procedure, what range of sizes are required and how fast a changeover is required. Whatever the need, there will be a shrink wrapping machine created to meet the application.

How Does Shrink Wrapping Work?
Many of us don’t really think about how a shrink wrap machine works or how the plastic ends up wrapped tightly around the product. However, it is about controlling and manipulating polymer particles; polymers are long atoms found in plastic, where they are generally twisted and arbitrary, and therefore unsuitable to act as a wrap. When they are made into a plastic film for shrink wrapping, the molecules are extended straight into a thin layer, perfect for wrapping around another product.

This film is then positioned around whatever needs to be wrapped. Once the warmth is connected to the film, it shrinks, because the heat makes the polymers come back to their regular tangled state. How much a polymer shrinks depends on what kind of polymer it is: PVC shrink wrap film can shrink as much as 50 percent of its unique size, while polyolefin shrink wrap film shrinks slightly less, despite offering stronger seals than PVC.

The Benefits of Shrink Wrapping

Shrink wrapping makes products more sealed and keeps out dampness and light introduction as well as protecting the product during transit. Shrink wrapping, for instance, is excellent for CDs as you can observe the cover, as well as food products and pharmaceuticals. Shrink wrap is also known for being a low-cost packaging solution, with an outlay for the packaging machine, polyolefin shrink wrap film is very economically friendly. Polyolefin shrink wrap film may seem thin – it is, in fact, the thinnest on the market – but this doesn’t compromise its strength.

Having been tried and tested for many years, these are just some of the reasons that shrink wrap is one of the leading packaging solutions in the world. For more information, read our article on the benefits of shrink wrap and how it can help your business.


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