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What is Window Patching in Packaging?

What is Window Patching in Packaging?

Window patching adds a touch of magic to product packaging. This technique creates a clear window, revealing your product and inviting customers to take a peek inside. It’s perfect for showcasing high-end items, letting their quality speak for itself. By giving customers a sneak preview, you build trust and excitement, encouraging them to make the purchase.

PET and PVC: Different types of Window Patching Films 

The two most common window patching films are polyethylene terephthalate (PET) and polyvinyl chloride (PVC).

Polyethylene terephthalate (PET) is a popular choice for window patching. It’s shaped and dried for superior protection, making it tamper-resistant and able to withstand regular handling. This makes it a great option for food and most retail products. While PET film is lightweight and might be prone to occasional scratches, it offers reliable protection for the product within.

Polyvinyl chloride (PVC) offers extreme durability as a window patching film. It boasts excellent resistance to scuffs, wear and tear, and even harsh weather conditions. However, PVC has a significant downside: it degrades under UV light. This degradation causes discolouration, unpleasant odors, and rippling of the film. Due to these effects, PVC is not suitable for packaging food or snacks. It’s best reserved for products requiring extra protection against heavy or frequent handling where sunlight exposure is minimal.

Process of Window Patching in Packaging

Now that you’re familiar with the different film options let’s dive into how window patching works!

The window patching process relies on a specialized machine designed to seamlessly add transparent windows to your packaging. Here’s how it works:

  • The Film Reel: The heart of the machine is a reel loaded with a continuous length of your chosen plastic film, typically PET (polyethylene terephthalate) or PVC (polyvinyl chloride). Each film type offers distinct advantages for different packaging needs.
  • Electromagnetic Bonding: Electromagnetic energy plays a crucial role. As your packaging swiftly passes through the reel, this energy activates a specialized adhesive on the film, causing it to bond securely to the packaging material.
  • Speed and Efficiency: The window patching process is remarkably fast. The packaging material can travel through the machine at astonishing speeds, potentially reaching hundreds of meters per minute. The film’s near-instantaneous adhesion eliminates the need for a separate drying stage, dramatically streamlining the process.
  • Ready to Impress: As soon as your packaging completes its journey through the machine, the window is in place and ready to showcase your product. This efficiency makes window patching an attractive finishing option for high-volume production runs.

What is the Right Window Size for Patching? 

The ideal size depends on your product, packaging design, and desired visual impact. You want a window large enough to showcase your product attractively yet small enough to ensure the package remains sturdy. Consider the product’s size and shape, how much you want to reveal, and the strength of the film you’ll use. Generally, leave a healthy border around the window for the film to adhere correctly. Experiment with different window sizes on mockups and consult with your packaging supplier for expert guidance on finding the perfect balance between display and durability.

Which Boxes are Best Suited for Window Patching?

Window patching is a versatile technique that enhances a wide range of boxes. It’s particularly well-suited for retail products where visual appeal is key, like food, cosmetics, toys, and electronics. Gift boxes benefit from a window’s elegant touch, letting recipients preview the contents without unwrapping. Bakeries and confectioneries use window patching custom cake boxes  to showcase the freshness and quality of their treats. Even subscription boxes can incorporate windows to offer a tantalizing glimpse of the curated items within. Window patching works effectively on various box materials, including cardboard, rigid paperboard, and plastics.

Need Window Patching for your Custom Boxes?

Considering custom die-cut boxes with a window to showcase your product? Window patching adds a touch of intrigue, allowing customers to peek at your merchandise without opening the box. This can be a great way to boost sales, especially for visually appealing products. 

If you’re interested in incorporating window patching into your custom packaging, it’s advisable to contact a professional packaging manufacturer like Box Agency. They’ll not only help you design the perfect box but also ensure the window patching is high quality and complements your overall design.

Stephan Benjamin

Stephen is a Packaging Consultant at Box Agency with a passion for innovative designs. He offers insights on how brands can improve their packaging to form a lasting impression. Stephen offers valuable advice to business owners and industry experts with years of involvement in product branding and promoting. His ability helps clients make packaging that stands out while aligning with their brand values and sustainability goals.

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