PermeabilityGas permeability testing of polymeric materials and containers

We determine the gas permeability of both film samples and complete containers (trays, bottles, etc.)

The rate of gas transmission through films or packaging (O2TR, WVTR), will play a determining factor in the product’s evolution after packaging

In order to achieve an adequate shelf life, it is essential to characterise the gas barrier properties of materials used in the packaging of food or other perishable products. The selection of packaging materials is based on the characteristics of the food to be packaged, so it is essential to consider whether the entry of ambient gas into the container will cause the food to deteriorate In cases where modified atmosphere packaging is used, the gas composition established during the packaging process must not be substantially altered during the product shelf life and any gas exchange must be limited. Permeation tests can be used to determine the barrier capacity of film samples or complete containers (trays, bottles, etc.) to various gases. Measuring the oxygen transmission rate (O2TR) or water vapour transmission rate (WVTR) enables manufacturers or material users:

• To verify the material characteristics and to evaluate the effects of Temperature and % Relative Humidity parameters
• Realizar el control de calidad del film/envase a la salida de fábrica, así como el seguimiento a lo largo de la vida útil del material de envase
• Assess the drop in barrier properties when the material is thermoformed or subjected to thermal processes, such as pasteurisation or sterilisation
• To know exactly how much oxygen or water vapour will pass through the package, an aspect that will reduce the packaged food’s shelf life
• To compare the performance of new materials compared to commonly used materials (e.g. more sustainable alternatives to existing packaging systems)