Stock material or miscellaneous articles – Hollow or container type article – Paper containing
Reexamination Certificate
2005-11-15
2005-11-15
Pyon, Harold (Department: 1772)
Stock material or miscellaneous articles
Hollow or container type article
Paper containing
C428S036600, C428S036700, C428S036910, C428S342000, C428S3550RA, C428S476300
Reexamination Certificate
active
06964797
ABSTRACT:
The present invention relates to a laminated packaging material suitable for use especially in heat-sealable packages for liquid food, such as milk, cream and juice cartons, and to a manufacturing method of the material, and to a food package manufactured of the material. The material comprises a core of paper or cardboard, and oxygen and aroma proof barrier layers of EVOH and polyamide. The EVOH layer and the polyamide layer are joined together directly without any intermediate adhesive layer, and the barrier layers and the core are interposed between polymeric heat-sealing layers on both sides of the material. The material is manufactured by extrusion so that at least the materials of the said barrier layers are placed against each other in a molten state and forwarded to the core in one web.
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Kirk-Othmer: Encyclopedia of Chemical Technology, 3rdEdition, vol. 18, John Wiley & Sons, pp. 354, 1982.
Heinonen Terttu
Järvinen Jalliina
Kuuppo Tuomo
Penttinen Tapani
Salminen Risto
Birch & Stewart Kolasch & Birch, LLP
Hon Sow-Fun
Pyon Harold
Stora Enso OYJ
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