Latest News

  • Important Factors in Permeation Testing

    Posted on 24/01/2014

    by Phil Neal

    Graham’s Colloidal Diffusion illustrates the three-step process of permeation through a material. The first step is the sorption of the permeant into the material. Next, the permeant diffuses through the material followed by the final step where it is desorbed from the other side. This entire process is driven by a concentration difference or gradient. Molecules will permeate from the high concentration side of the material to the low concentration side. This will continue until both sides are at equal concentration levels. Learn More...

  • 13th International MOCON Permeation Conference - April 2013

    Posted on 12/12/2012

    by Phil Neal

    RDM Test Equipment are delighted to announce the 13th International MOCON Permeation Conference will take place on 9th April 2013, near Frankfurt, Germany. The seminar is aimed at people involved in barrier material selection, package testing, QC/QA and R&D functions. Delegates will gather from across Europe, providing networking opportunities. The full programme and reservation form is now available by clicking here.

  • Permeation and its impact on Packaging

    Posted on 26/10/2012

    by Phil Neal

    Shelf life is the length of time that foods, beverages, pharmaceutical drugs, chemicals, and many other perishable items are given before they are considered unsuitable for sale, use, or consumption. Permeation greatly influences the shelf life of these products as the loss or gain of oxygen, water vapor, carbon dioxide and odors and aromas can rob the product of flavor, color, texture, taste, and nutrition. Oxygen, for example, causes adverse reactions in many foods such as potato chips. By measuring the rate at which O2permeates through the package material, one can begin to determine the shelf-life or amount of time the unopened package will still provide ‘good’ chips.

    Permeation measurements are crucial to targeting a package’s sweet spot. This sweet spot is defined as the intersection between effective marketing, product protection and cost. When all three areas combine, a functional, cost-effective package that meets its shelf life requirements is developed.However, the product protection segment is often overlooked and can have a significant impact on the other segments, especially the cost. Learn More...