Method for applying a primer coating to glass containers
AssigneeOwens-Brockway Glass Container Inc.
InventorBrian Chisholm
Life of this patent
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Abstract
A method of manufacturing a glass container in preparation for direct digital printing includes forming a glass container having a glass wall and applying a primer coating to the glass container. The primer coating is applied by directing an atomized spray of an aqueous primer composition onto the glass container over an adherent base layer, such as a hot-end coating, which deposits the primer coating, followed by heating the primer coating with a heat source such as a flame. Upon being heated, the clarity of the primer coating is increased. As a result, a decorative marking may be printed onto the glass container without having to pretreat the glass container in a way that involves pyrolytically depositing a layer of silicon dioxide onto the glass container prior to printing.
Claims22
A method of manufacturing a glass container, the method comprising:
- forming a glass container that comprises a glass wall having an exterior surface, the glass wall enclosing an interior containment space and defining an opening to the interior containment space;
- applying an adherent base coating over at least a portion of the exterior surface of the glass wall of the glass container;
- directing an atomized spray of an aqueous primer composition, which comprises a dispersion of an acrylic acid polymer in water, onto the glass container over the adherent base coating to deposit a primer coating including the acrylic acid polymer over the adherent base coating;
- and
- heating the primer coating to release trapped air and water from within the acrylic acid polymer and to increase the clarity of the primer coating.
A method of manufacturing a glass container, the method comprising:
- forming a glass container that comprises a glass wall having an exterior surface;
- annealing the glass container including reheating the glass container to raise a temperature of the glass wall and then cooling the glass wall;
- applying a hot-end coating directly to the exterior surface of the glass wall of the glass container either before or during annealing, the hot-end coating comprising a metal oxide and being applied to the exterior surface of the glass wall by decomposing a heat-decomposable metal oxide precursor material onto the exterior surface of the glass wall;
- and
- applying a transparent primer coating directly to the hot-end coating, the transparent primer coating comprising an acrylic acid polymer, and wherein the hot-end coating and the primer coating are the only two coatings applied to the glass container.
Dependencies are inferred from the claim text.