Article | REF: AM3577 V2

Rigid and flexible multiply packaging materials - Lamination and coextrusion

Authors: Pierre CHOMON, Bernard CHARNIER

Publication date: July 10, 2017

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11. Glossary

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,...

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