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GAS BARRIER COMPOSITE FILM FOR HYDROTHERMALLY PROCESSABLE PACKAGE AND PACKAGING BAG OBTAINED BY USING SAME

  • US 20090148640A1
  • Filed: 08/23/2006
  • Published: 06/11/2009
  • Est. Priority Date: 08/24/2005
  • Status: Abandoned Application
First Claim
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1. A gas barrier composite film for a hydrothermally processable package,wherein at least one gas barrier layer comprising a gas barrier resin and an inorganic layered compound is interposed between a base film layer and a sealing material layer, andan adhesive layer is further formed on both sides of the gas barrier layer by applying an adhesive composition comprising:

  • a base material mainly comprising a polyurethane resin having at least one functional group selected from the group consisting of an amino group, a hydroxyl group, and a carboxyl group; and

    a curing agent comprising an isocyanate curing agent and an epoxy curing agent, at the following functional group ratio;


    I/P=0.3 to 30.0
    E/P=1.5 to 25.0(here, “

    P”

    represents the total number of moles of primary and secondary amino groups, hydroxyl groups, and carboxyl groups contained in the base material, “

    I”

    represents the number of moles of isocyanate groups contained in the isocyanate curing agent, and “

    E”

    represents the number of moles of epoxy groups contained in the epoxy curing agent).

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