Glossary · Packaging

Headspace

The empty volume inside a sealed pouch above the product. Excess headspace increases the residual oxygen load and the volume of humid air the desiccant must manage.

Barrier film The multilayer plastic structure used to make freeze-dried fruit pouches. WVTR (Water Vapor Transmission Rate) The rate at which water vapor passes through a barrier film under defined conditions, typically reported in g/m²/day. OTR (Oxygen Transmission Rate) The rate at which oxygen passes through a barrier film, typically reported in cc/m²/day. Metallized film A flexible film with a thin vapor-deposited aluminum layer. Foil laminate A flexible packaging structure built around an aluminum foil layer. Desiccant A small packet — usually silica gel or molecular sieve — that absorbs moisture inside a sealed pouch. Oxygen absorber A packet that chemically removes residual oxygen from a sealed pouch. Heat seal The thermally bonded edge of a flexible pouch.

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