Patent ID: 6722560
Filing Date: 2004-04-20
Classification: B32B,Y10S,Y10T

Abstract:
A bulk box adapted to hold large quantities of material for bulk shipment and storage of the material, said bulk box formed from corrugated cardboard having a bottom and upstanding sidewalls and having only a single moisture vapor barrier, said sidewalls having an inner surface and an outer surface and comprising at least one ply of corrugated cardboard;an outer liner bonded to the outer surface of said sidewalls, said outer liner comprising an inner ply and an outer ply of kraft paper; and said moisture vapor barrier comprising a readily repulpable moisture vapor barrier material between the plies of kraft paper, said repulpable material functioning as both an adhesive to bond the plies together and as a moisture vapor barrier, said outer ply of kraft paper having a felt side exposed exteriorly of the box for accepting printing, said layer of readily repulpable water vapor barrier material resisting penetration of moisture into the cardboard from the ambient atmosphere, thereby increasing the strength and shelf life of the box under humid ambient conditions, and especially under conditions of cyclic changes in ambient humidity.