engleski

Barrier packaging materials

An important requirement in selecting food packaging systems is the barrier properties of the packaging material. Barrier properties include permeability of gases (such as O2, CO2, and N2), water vapour, aroma compounds and light. These are vital factors for maintaining the quality of packaged foods. Traditional packages (glass containers, metal cans) as well as plastic bottles, and laminates (such as paper laminated with aluminium foil) provide a proper barrier to oxygen. However, some differences exist between the various packaging systems. In the case of metal cans and glass containers, these can be regarded as impermeable to the passage of gases, odours and water vapour. Plastics-based packaging materials provide varying degrees of protection, depending largely on the nature of the polymers used in their manufacture.

barrier; food; packaging

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