Method and device for improving adhesion of the individual layers of a composite material
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United States of America Patent
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Issued Date -
Oct 13, 2005
app pub date -
May 31, 2005
filing date -
Feb 5, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and an apparatus for improving the adhesion of the individual layers of a composite material made of plastic-coated cardboard, especially for the manufacture of drinks/foodstuffs composite packages, wherein the composite material has a metal layer if necessary and wherein the composite material is heated in the opening region of the later package, as well as a sheet-like composite material manufactured thereafter or a composite package manufactured therefrom, are presented and described. In order that the adhesion between the individual layers in the opening region of the later package is so much improved that during piercing of the package wall a defined destruction takes place through using the pouring element used, the composite material is compacted by a defined supply of energy and subsequent pressing together at least in the opening region of the later package. The energy supply can be provided by means of a high-frequency coil, an infrared unit or an ultrasonic welding unit.
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