Shrink Wrapping - A Practical Guide to How It Works and What to Choose

Walk through any warehouse, supermarket, or distribution centre and shrink wrapping is everywhere, often without anyone giving it a second thought. It holds multipacks together, keeps food fresh, protects books and printed goods in transit, and gives products a clean finish on the shelf. Behind that everyday result sits a choice between machines and films that has a real effect on cost, speed, and waste. Kempner has supplied shrink wrapping machinery and materials in the UK for over fifty years, and this guide sets out how the process works, what the options are, and how a business can pick the right setup with confidence.

What Is Shrink Wrapping?

Shrink wrapping is a packaging method that uses a plastic film which tightens around a product when heat is applied. The film is loosely placed around the item, then passed through or exposed to heat, at which point it shrinks to form a snug, protective layer that follows the shape of whatever it covers.

The result does several jobs at once. It protects the product from dust, moisture, and handling damage, holds multiple items together as a single pack, and gives a tidy, professional appearance. Because the film conforms closely to the product, it suits everything from a single book to a tray of food or a bundle of bottles. Kempner supplies both the machinery that applies the film and the film itself, so the two parts of the process are matched to work together rather than sourced piecemeal.

How Does the Shrink Wrapping Process Work?

The process rests on two elements working in step: a film that shrinks when heated, and a machine that applies that heat in a controlled way. The film is first sealed around the product, then heat is introduced, usually through a shrink tunnel or a heat source built into the machine. As the film reaches the right temperature, it contracts tightly around the item.

The quality of the finished wrap depends on getting both parts right. Too little heat leaves the film loose, while too much can distort it, so the machine and the film need to suit each other and the product being wrapped. This is why matching the two matters, and it is a large part of what a specialist supplier brings to the job. A film chosen in isolation from the machine, or the other way round, rarely gives the best result.

What Types of Shrink Wrap Film Are Available?

Film is not a single product, and the right choice depends on what is being wrapped and what the business values most. Kempner offers a wide range of films, and the main options each suit different needs.

Polyolefin Shrink Wrap Film

Polyolefin is a widely used film valued for its strength and clean finish. It is a common choice for retail and food products, where a clear, durable wrap matters.

PVC Shrink Wrap Film

PVC is another established option, often chosen for non-food items such as boxes, books, and other goods where its properties and cost make it a sensible fit. Kempner's own guidance covers when PVC is the right choice over other films.

Polyethylene (PE) Shrink Wrap Film

Polyethylene is a heavier duty film suited to larger or heavier items that need a more substantial wrap, including bundling and industrial applications.

Compostable and Recyclable Films

For businesses focused on reducing environmental impact, Kempner offers compostable, or biodegradable, shrink wrap film, alongside recyclable and recycled content options. The company can help find a compostable or recyclable film that works with a business's existing machinery, which means a move to more sustainable packaging does not have to mean replacing equipment.

You can compare the full set on Kempner's materials page.

What Shrink Wrapping Machinery Is Used?

Just as films vary, so do the machines that apply them. The right machine depends mainly on how much a business wraps and how much of the process it wants automated. Kempner offers manual, semi-automatic, and fully automatic models, which between them cover a broad span of needs.

• Semi-automatic machines suit businesses with steady but moderate volumes, where an operator is involved in each cycle. These are a practical fit for settings such as printing and publishing.
• Automatic machines handle higher throughput with less manual input, which suits busy production lines.
• Bubble, or chamber, machines seal and shrink in a single enclosed unit, which works well for smaller items and lower volumes.
• Sleeve sealers and shrink tunnels suit applications where products run through a continuous process.

The range gives a business room to match the machine to its actual workload rather than over or under investing. Kempner's shrink wrap machinery section sets out the full selection.

How Should a Business Choose the Right Shrink Wrapping Setup?

Picking the right combination is mostly about being honest about volume, product, and priorities. A few questions make the decision clearer.

What Volume Needs Wrapping?

Throughput is the first thing to settle. A business wrapping a few hundred items a week has different needs from one wrapping thousands a day. Matching the machine to volume avoids paying for capacity that sits idle, or buying a machine that cannot keep up.

What Is Being Wrapped?

The product shapes the film choice. Food has different requirements from books, and heavy industrial goods need a stronger film than light retail items. Identifying the product first narrows the film options sensibly.

How Important Is Sustainability?

For many businesses, reducing packaging waste now sits alongside cost as a priority. Because Kempner can supply compostable and recyclable films that work with existing machinery, a business can often improve its environmental footprint without a wholesale equipment change. This is worth weighing early rather than treating it as an afterthought.

Is Ongoing Support Available?

A machine is a long term investment, so after sales support matters. Kempner provides commissioning and servicing, and aims to build long lasting relationships with the businesses it supplies. Reliable support keeps a line running and protects the value of the original purchase.

Frequently Asked Questions

What is the difference between shrink wrapping and vacuum packing?

Shrink wrapping uses heat to tighten a film around a product for protection and presentation. Vacuum packing removes air from a sealed pouch, which is generally used to extend the shelf life of food. They serve different purposes, and Kempner supplies machinery and materials for both.

Can shrink wrapping be environmentally friendly?

Yes. Kempner offers compostable and recyclable films, and can help match a sustainable film to existing machinery, so a business can gain the benefits of shrink wrapping while reducing its environmental impact.

Which industries use shrink wrapping?

It is used across many sectors, including retail products, meat and food products, fast moving consumer goods, cakes and biscuits, and bottles and jars.

Do I need different film for different machines?

Film and machine need to suit each other and the product, which is why matching them matters. A specialist supplier can advise on the right pairing rather than leaving it to guesswork.

Final Thoughts

Shrink wrapping brings together a film that tightens under heat and a machine that applies that heat, and getting both right is what produces a clean, protective, professional wrap. The choices around film type, machine, volume, and sustainability all shape the result, which is why matching the parts to the product and the workload matters so much. Done well, shrink wrapping protects goods, presents them well, and can reduce waste at the same time.

Kempner has supplied shrink wrapping machinery and materials in the UK for over fifty years, offering manual, semi-automatic, and fully automatic machines alongside a wide range of films.