Wapo’s laminated bags and one-way valves are a simple, effective and inexpensive solution to prevent damage from pressure variations.

During transit, products can be subjected to massive pressure differences due to altitude and the manner in which they are packed. As well as external threats of pressure to the packaging, some products themselves incur natural changes in product composition, releasing some gases of their own. Therefore packaging that can sustain your product through pressure differences is imperative.

Wapo’s line of laminated bags provide excellent protection for products that don´t require an exocasing to avoid product breakage such as loose foods, personal care products and more. Flavors and moisture are retained thanks to the excellent barrier properties of the bags' aluminum composition.

To counteract the internal pressures of released natural gases, Wapo offers a line of premium laminated bags that incorporate an ingenious one-way valve. The valve allows gasses that build up within the bag to be released through the valve in order to ensure internal pressure never builds up to a point where the bag bursts. Miraculously, it does this without permitting external gasses or moisture from making its way into the bag, ensuring the contained product always retains its original composition.

See Laminated Bags and One-Way Valves in the catalog or contact Wapo for more information.