Patents Assigned to Nobel AB
  • Patent number: 5603997
    Abstract: The present invention relates to a packaging material for reduced transfer from a package to its content of substances causing undesirable taste and/or hazardous substances, this reduction being due to the packaging material containing a hydrophobic zeolite. More specifically, the invention concerns paperboard, in which case the substances causing undesirable taste mainly are naturally occurring extractive substances, oxidation products thereof and, to a lesser extent, the paper chemicals present. Further, the presence of a hydrophobic zeolite in the paperboard enhances the water-repellent (hydrophobic) capacity. Also, the present invention concerns a method for production of a packaging material of paper, board or paperboard by forming and dewatering a suspension of lignocellulose-containing fibres, where the dewatering takes place in the presence of a hydrophobic zeolite.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: February 18, 1997
    Assignee: Nobel AB
    Inventors: Erik Lindgren, Kenneth Larsson, Signar Sundstrand, Anna Andersson