Patent ID: 6740373
Filing Date: 2004-05-25
Classification: B32B,B65D,D21H,Y10T

Abstract:
A coated paperboard characterized by having grease, oil and cut resistance, varnish gloss and smoothness, and improved bulk insulation, and tactile properties useful as a base stock for forming substantially rigid food containers having on a coated side a coefficient of kinetic friction of in excess of about 0.2 and a static coefficient of friction in excess of about 0.2 comprising:a) a paperboard blank having a basis weight suitable for a selected type of food container; b) optionally a base coat coating layer applied to one surface of the paperboard blank, the base coat coating layer comprising a base coat polymer binder and optionally a pigment; c) optionally a top coat coating layer applied to the base coat coating layer, the top coat coating layer comprising at least one organic polymer binder and optionally a pigment; and d) a liquid organic polymeric binder mixture layer including texturizing and insulating agents selected from the group consisting of microspheres, gases, glass beads, and mixtures of these applied to the other surface of the blank in a pattern having covered areas and open areas which surface has been heated to expand and cure the liquid texturizing and insulating agent polymeric binder mixture.