Is a vented or valve bag safer for dry ice?
When you ship frozen food or pharmaceuticals with dry ice, the packaging needs to do more than just insulate—it must release gas safely. As dry ice sublimates, it produces carbon dioxide gas; if trapped, pressure builds up and can cause the package to burst. Two common bag types are vented liners with micro perforations and bags equipped with a one way valve. Both claim to control CO₂ release, but which is safer and more reliable? This article compares vented bags with valve bags, explains how each works, and helps you choose the best option for your cargo. We will discuss safety, performance, regulatory requirements and 2025 trends, drawing on authoritative guidance and real world examples. How vented and valve bags manage carbon dioxide and why venting matters for dry ice. What makes vented bags safer and simpler to use compared to valve bags. Step by step guidance on preparing, sealing and inspecting both bag types. Factors that influence bag choice, including payload, transport mode and...
