There are generally two types of closures for flexible packaging: press-to-close zippers and slider zippers. Both options are made of plastic and can be sealed into a multitude of packaging formats—everything from a small format pouch to a bulk multi-use package.
Both applications have a shaped, extruded plastic arrowhead that connects into the opposing locking component. The key difference between the two formats is how we engage with the zipper.
The Press-To-Close Zipper
With press-to-close zippers, consumers use their fingers to pull the flanges apart and push the ribs together.
Brands looking for an economical solution that still want to offer consumer convenience often utilize press-to-close zippers. These zippers offer a balance of features and cost, while still providing extended freshness and convenience.
The cost of putting a zipper on an on an individual package is minimal when compared to the overall cost of the package. While the cost is minimal compared to the total package cost, it adds a significant amount of value that could be the difference between a consumer selecting your product over a competitor’s.
Press-to-close zippers come in multiple variations to meet a brand’s objectives and requirements. While all press-to-close zippers can be customized for specific applications, below are some examples of where they’ve been proven to support the following products and end users:
- Double Lock Zippers provide added protection against spillage and freezer burn for frozen foods
- Thermoform Zippers provide reliable closures for processed and sliced meat products running on thermoform/fill/seal equipment
- Contaminant Resistant Zippers work well for products like spices, potting soils, and sauce mixes to ensure small particles aren’t trapped in the track during closing.
- Click “Lock” Sensory Zippers assure on-the-go travelers that their pouch is fully sealed with an audible clicking noise
The Slider Zipper
Slider zippers add a premium level of convenience and performance for consumers. Functionality wise, the slider piece itself directs the zipper tracks into place. It’s simply easier for consumers. Plus, the slider piece forces a consumer to completely seal a package from one edge to another.
Without a slider piece, consumers will sometimes start sealing from the middle, outwards which can potentially lead to unsealed air gaps in the zipper track. Sliders add more assurance that the package is completely closed.
For more information about Hanpak’s plastic bag products, please contact us:
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