A New Bag-In-Box Welding Technology Helps Avoid Transport Damage and Claims

Rapak, a leading flexible packaging manufacturer, is launching W-Seal® – a unique reinforced welding system for more resistant, crack-free Bag-in-Box bags. Flexible bags with new patent-pending welding technology are available exclusively to all Rapak customers from summer 2019.

The Bag-in-Box format is growing across the globe driven by its unbeatable logistics efficiencies, extended shelf life and sustainability benefits. To make Bag-in-Box bags even more resistant during transportation, Rapak has developed a new patent-pending welding technique that creates a new honeycomb-like pattern in the melted plastic. It creates a stronger seal, preventing possible cracks and leaks at the welded seam.

W-Seal resolves one of the main concerns when it comes to Bag-in-Box: a risk for plastic cracking on the seam where the dispensing tap is welded into the flexible bag. A standard welding seal of a flexible bag is uniform and without any profile; the molten plastic might drift away and as a result, there can be a recession which can create potential for stress cracking at the tap and bag welding seam. With W-Seal, the plastic is profiled so the melted plastics flow into the honeycomb structure, creating a stronger flat seam with stronger anti-crack properties. Customers that use Bag-in-Box for exports will especially appreciate the new welding technique as it makes this packaging even more reliable for long transit distance or unpredictable conditions. 

W-Seal will also be a big advantage for customers that use Bag-in-Box format in e-commerce, as last mile damages are very common in this channel. At Rapak, we are committed to the highest quality standards of our products, that is why we will upgrade all our customers to W-Seal, starting with our plant in Germany throughout 2019.
— Alexander Kayser, General Manager Rapak Europe

W-Seal is a patent and trademark pending technology from Rapak, a leading global flexible packaging manufacturer. 

Contact us to learn more about Rapak and our Bag-in-Box product portfolio

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