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Polymer-coated heat-sealable packaging material, method for manufacturing the same and a closed package made thereof

  • US 20040258893A1
  • Filed: 03/12/2004
  • Published: 12/23/2004
  • Est. Priority Date: 07/13/2001
  • Status: Active Grant
First Claim
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1. Method for manufacturing a heat sealable packaging material, in which method both sides of a fibre base are provided with a polymeric heat sealing layer, characterized in that a polymeric water vapour barrier layer (2, 9) containing high-density polyethylene (HDPE) is extruded on both sides of the fibre base (5) so that the water vapour barrier layer remains between the fibre base and the outer heat sealing layer (1, 10) in the packaging material.

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