Ovenable food tray and its manufacturing method

Abstract

The invention is related to an ovenable food tray (1) and its manufacturing method. The paperboard or cardboard tray is provided with at least one layer of polymeric coating (3, 4) which, according to the invention, is lying at least on the side of the tray coming into contact with the food and contains a polymerized crosslink structure which consists of an inorganic, chain or crosslinked polymeric backbone which contains alternating silicon and oxygen atoms and which comprises side chains and/or crosslinks formed by organic groups or chains. The tray (1) is manufactured by spreading, on the board (2), a mixture which contains reactive ingredients and which is polymerized to form a grease-tight, glassy coating (3, 4) that withstands heat, on at least one and preferably both sides of the paperboard, and by forming the tray from the thus obtained, coated paperboard. The polymerized ingredients can be organosilanes with which crosslinking organic compounds, such as epoxides, can be reacted. The coated tray thus obtained is water- and grease-tight and it withstands the operating temperatures of conventional ovens and microwave ovens.

Dependencies are inferred from the claim text.