Glossary
Rigid and flexible multiply packaging materials - Lamination and coextrusion

Water activity (A_w)

Activity Water, hence the symbol A_w.

Represents the proportion of free water in a product. It is one of the main parameters influencing the preservation of food or pharmaceutical products. The greater the amount of free water (A_w high), the greater the potential for micro-organisms to thrive.

Calculated as the ratio between the water vapor pressure of a wet product and the saturation vapor pressure at the same temperature.

Appertisation

Heat treatment of a product to sterilize it.

Bag-in-Box^®

Flexible packaging for liquids (wine, oil, etc.) in a plastic bag in a cardboard box.

Laminating

A thin layer of glue is applied between 2 sheets to be joined.

Corona

Surface treatment of polymer films that modifies their surface energy to improve ink adhesion. This treatment...