Aluminium foil is widely regarded as the most effective barrier material in flexible packaging,
giving almost perfect protection against light and suppressing any transport of matter. Foil is
usually converted to flexible packaging laminates by traditional converting processes, such as
lacquering or 2-component-adhesive lamination, but more and more extrusion coating and
extrusion lamination are being used.
Almost all aluminium is put through an annealing process, to produce an appropriate surface,
which is as good and homogeneous as possible with regard to unwinding properties (at high
speed), wettability, adhesion and chemical resistance.
The effects on adhesion performance as a result of replacement of traditional sealants and
adhesives by extrusion coatings are described for selected types of packages and packaged goods.
Aspects relating to the foil’s surface and coatings’ barrier will be discusse
Aluminium foil is widely regarded as the most effective barrier material in flexible packaging, giving almost perfect protection against light and suppressing any transport of matter. Foil is usually converted to flexible packaging laminates by traditional converting processes, such as lacquering or 2-component-adhesive lamination, but more and more extrusion coating and extrusion lamination are being used. Almost all aluminium is put through an annealing process, to produce an appropriate surface, which is as good and homogeneous as possible with regard to unwinding properties (at high speed), wettability, adhesion and chemical resistance. The effects on adhesion performance as a result of replacement of traditional sealants and adhesives by extrusion coatings are described for selected types of packages and packaged goods. Aspects relating to the foil’s surface and coatings’ barrier will be discusse
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