Patent ID: 7108765
Filing Date: 2006-09-19
Classification: D21H,D21J

Abstract:
1. A method of forming an insulating paperboard comprising: forming a paperboard having at least one layer of cellulose fibers, at least some of the cellulose fibers in said at least one layer being crosslinked cellulose fibers present in an amount from 25% to 100% of said at least one layer, said paperboard being sufficiently insulating to provide a hot water ΔT across said paperboard of at least 0.7° C.±2.3° C. per 0.1 mm of caliper, said paperboard having a density of less than 0.5 g/cc, and a basis weight of from 200 gsm to 500 gsm, the caliper of said board being greater than or eciual to 0.5 mm, and embossing a surface of said paperboard to reduce the effective surface area thereof.