Have you ever picked up a product just because you could see it inside the box? That’s window patching, it lets customers see what they’re buying before they open the packaging. This small window helps build trust, shows off your product’s quality, and makes the packaging more eye-catching.
What is Window Patching?
Window patching is a technique in which a clear thin plastic film is applied to a cut-out window on the box. The clear window lets customers see the product before they open the packaging. Added plastic film boosts the visibility of products like toys and snacks on the shelf.
What are the different types of films used in window patching?
In window patching, two main plastic film materials, PET (Polyethylene Terephthalate) and PVC (Polyvinyl Chloride), are popular in packaging. These films not only help display the product clearly but also protect it from damage.
Let’s take a look at some of the most commonly used materials:
1. PET Film (Polyethylene Terephthalate)
PET film is one of the most widely used materials in window patching. It is moulded to fit the required shape and then dried for added protection. It’s lightweight, clear, and strong enough to protect products from everyday wear and tear. It can scratch easily, but it still offers strong protection. PET is also food-safe, making it a go-to option for food packaging and retail items.
2. PVC Film (Polyvinyl Chloride)
PVC film is protective and more resistant to damage than PET. It stands up well against tampering and the environment. However, it’s not the best option for food packaging because UV exposure can cause it to break down over time, producing a strong smell and odd rippling effect.
There are also several other materials used in window patching:
- Polypropylene: This film is clear, flexible, and ideal for food-related products. Often used for bakery packaging to pack items like candy, snacks, and baked goods.
- Glassine: Glassine helps prevent oil and grease from soaking through the packaging products with high grease content.
- Polyethylene: This material holds up the frozen items well in low temperatures and keeps products protected during freezing and storage.
- Polyolefin: Polyolefin is a shrink film that holds the product closely and offers a neat, tamper-evident seal.
- Foil Lamination: This option provides an extra layer of protection and helps maintain product freshness. It is perfect for packaging items that are sensitive to light and air.
Flexible vs. Rigid Windows: What’s the Difference?
Window patches come in two main types:
- Flexible Windows: Made from soft, thin films like polyester. These are budget-friendly, recyclable, and food-safe. They work well for packages with curves or unique shapes.
- Rigid Windows: Made from hard plastic. These are stronger and often used in luxury packaging or for larger windows. They’re common in cosmetics and high-end products.
Process of Window Patching
It all starts with a roll of clear plastic film, like PET or PVC. This film is loaded into the machine, which is designed to apply it neatly over pre-cut windows in the packaging.
As the packaging material moves through the machine, electromagnetic energy helps attach the film quickly and accurately.
There’s no need to wait for it to dry. The film sticks instantly, so once the packaging comes out of the machine, it’s ready to go.
This makes the window patching process fast and efficient, perfect for brands that need high-quality packaging without slowing down production.
How to choose the right window patching film?
Here are a few things to consider that can help you choose the best type of window patching for your packaging needs. These tips will make your decision much easier:
1. Right Window Size
When deciding on the window size for your packaging, it’s important to think about how big or small you want the window.
Larger windows are great for showcasing your product, but can be more exposed to scratches or damage.
If you go for a smaller window, you may not need as thick a film. Remember to leave enough space in your design for the film to be securely attached to the packaging.
2. Strength and Durability
For luxury products, like cosmetics, you’ll need a stronger film to ensure the packaging not only protects the product but also offers clear visibility.
High-end items often require packaging with extra sturdiness to withstand shipping and handling, so the material needs to be durable.
This extra strength, however, can make the production process longer and more expensive.
3. Environmental Conditions Affect Window Patching
If your product will be exposed to heat, cold, or moisture, you need to choose a window patching film that can handle these conditions.
Packaging films should be strong enough to protect your product, even in tough environments.
For example, baked goods are often packaged when they are warm, which creates steam inside the box. Later, they might be flash frozen to keep them fresh. If the film isn’t strong enough, it could fog up, wrinkle, or tear, ruining the look and protection of the package.
That’s why it’s important to choose high-quality materials and work with packaging experts who understand your product’s needs.
