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US 6,548,572 B1Granted
Surface printing inks and coatings for use
AssigneesDuPont Canada Inc., Sun Chemical Corporation
InventorsAlan Keith Breck, Michael A. Davids
Life of this patent
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AssigneesDuPont Canada Inc., Sun Chemical Corporation
InventorsAlan Keith Breck, Michael A. Davids
Estimating the term…
This invention relates to non-aqueous coating and ink formulations for use on flexible film or paper packages for food, which require aseptic packaging conditions. The printed and coated packaging materials, and methods of aseptic packaging, as well as the aseptic packages are also disclosed. The coating formulation comprises the following components: 1) a mixing varnish comprising a phenolic-modified co-solvent-type polyamide resin, 2) a nitrocellulose compound varnish, 3) a non-aqueous solvent mixture, and 4) specialty additives, and wherein all components present in the formulation are stable in the presence of an oxidizing agent. The ink formulation comprises the following components: 1) a mixing varnish comprising a phenolic-modified co-solvent-type polyamide resin, 2) a nitrocellulose compound varnish, 3) a non-aqueous solvent mixture, 4) a non-aqueous solution of a metal salt of propionic acid and 5) specialty additives, and wherein all components present in the formulation are stable in the presence of an oxidizing agent.
A non-aqueous coating formulation compatible with aseptic packaging processes which comprises the following components:
A non-aqueous ink formulation compatible with aseptic packaging processes which comprises the following components:
A process for manufacturing a coating formulation that is stable when applied to a packaging material surface and remains so when the film is used to package food products under aseptic packaging conditions, which comprises the steps of dissolving at least one phenolic-modified, co-solvent-type polyamide resin in at least one non-aqueous solvent, and combining the above mixture with the following additional components:
A process for manufacturing an ink formulation that is stable when applied to a packaging material surface and remains so when the material is used to package food products under aseptic packaging conditions, which comprises the step of dissolving at least one phenolic-modified co-solvent type polyamide resin in at least one non-aqueous solvent, combining the above mixture with a nitrocellulose, at least one pigment and a non-aqueous solution of a metal salt of propionic acid, and with at least one synthetic wax, at least one slip release agent, and one or more specialty additives selected from plasticizers and adhesion promoters.
Dependencies are inferred from the claim text.