The permeability or inverse barrier is an important physical property for many industrial and biomedical applications of polymers.
For example, polymers with low permeability, i.e. high barrier properties, are required for food packaging applications to prevent loss of flavor, color and quality and to retard spoilage.
But this is not the only important application; there are numerous other application for polymers with low, high or tailored permeability like protective coatings (e.g., paints and varnishes), filters and membranes for gas or liquid separation and water desalination, and polymer coatings for controlled drug release.
Permeability testing equipments for oxygen, carbon dioxide & water vapor
