Patent ID: 6794016
Filing Date: 2004-09-21
Classification: B32B,C08L,C09J,D21H,Y02P,Y10T

Abstract:
A recyclable, water-resistant corrugated fiberboard sheet comprising a water-resistant linerboard adhered to both surfaces of a corrugated, water-resistant core sheet, wherein the water repellency (JIS P8137) of at least one of the surfaces of both of the corrugated water-resistant core sheet and the core sheet-side surface of the water-resistant linerboard is at least R 6 and that the Cobb water absorption (JIS P8140; contact time: 30 minutes) of at least one of the surfaces of the corrugated fiberboard sheet is not higher than 30 g/m2, wherein a water-resistant lever is present on at least one of the surfaces of the corrugated fiberboard sheet, said water resistant layer comprises a synthetic resin and a pigment mixture, wherein the pigment mixture comprises 5 to 40% by mass of a first pigment having an aspect ratio of less than 5 and an average particle diameter of 5 to 15 &mgr;m and 95 to 60% by mass of a second pigment having an average particle diameter of not larger than 3 &mgr;m.