Production of fibrous sheet material

摘要

A method for producing a self-sustaining sheet of essentially cellulosic fibrous material with improved strength wherein a dry-laid web is moistened and then consolidated by passage along a heated consolidating surface wherein the web is held against this surface by one side of a supporting band, against the other side of which at least two spaced apart pressure rolls exert a pressure acting through the supporting band against the web, which pressure is preferably between 150 and 500 pounds per linear inch. The supporting band thereby maintains the web against the heated consolidating roll between said pair of pressure nips.