Paperboard

Abstract

A paperboard is made by a process using a high consistency pulp slurry containing high levels of crosslinked cellulosic fibers, dispersing the fibers in a screen with a rotor in the screen and then passing the fibers through the screen basket with a hole diameter of at least 2 mm and forming the cellulosic fibers on a foraminous support. Another slurry of regular cellulosic fibers is deposited on at least one side of the first slurry during the formation process and the resulting web is dewatered and dried.

1 . A paperboard product produced by the process comprising the steps of; forming at least one high consistency first slurry of cellulosic fibers in an aqueous dispersion medium wherein said cellulosic fibers comprise crosslinked fibers 
 forming at least one second slurry comprising celluosic fibers in an aqueous dispersion medium    passing said high consistency first slurry through a screen with a hole diameter of at least 2 mm    passing said second slurry of cellulosic fibers through a screen with a hole diameter of at least 1 mm    forming one of said slurries of cellulosic fibers on a foraminous support    forming the other of said slurries on said first slurry    withdrawing liquid from said first and said second slurries    drying said formed board.