Grease resistant paperboard and pizza box made therewith
AssigneeKruger Holdings L.P.
InventorIan MACEACHEN
Life of this patent
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Abstract
A paperboard assembly adapted for food contact comprises a contacting layer made of permeable material; an external layer; and a core layer located between the contacting layer and the external layer. The core layer is adapted to impede migration of fluid therethrough, therefore a fluid contacting the contacting layer migrates at least partially through the contacting layer and is impeded from reaching the external layer by the core layer. A describes realization is a pizza box made of the paperboard assembly and a method of manufacturing the paperboard assembly.
Claims20
A paperboard assembly comprising:
- a contacting layer made of permeable material;
- an external layer;
- and
- a core layer located between the contacting layer and the external layer, the core layer having fluid-repellent characteristics impeding migration of fluid therethrough;
- wherein a fluid contacting the contacting layer of the paperboard assembly migrates at least partially through the contacting layer and is impeded from reaching the external layer by the core layer.
A method of manufacturing grease-repellent paperboard on a paperboard machine comprising a press section, the method comprising:
- forming a first external layer on the paperboard machine;
- spraying a fluid-repellent compound on pulp used for forming a core layer after dewatering of the pulp thereof;
- forming the core layer from the sprayed pulp on the paperboard machine;
- forming a second external layer on the paperboard machine;
- and
- assembling the first external layer, the second external layer and the core layer in-between in the paperboard machine prior to assembling the first external layer, the core layer and the second external layer into the paperboard on the press section;
- whereby the paperboard thereby comprises a fluid-repellent core layer between two external layers, and
- wherein the core layer is adapted to impede migration of fluid therethrough.
A food package for containing food made of a paperboard assembly, the paperboard assembly comprising:
- a food-contacting layer, the food-contacting layer being permeable to fluid;
- an external layer;
- and
- a core layer made of paperboard having fluid repellent characteristics impeding fluid from the food from reaching the external layer;
- wherein the food-contacting layer, the core layer and the external layer are bonded together and shaped to form the food package.
Dependencies are inferred from the claim text.