Patent ID: 6358364
Filing Date: 2002-03-19
Classification: C01B,D21H

Abstract:
A method for flocculating the components of a paper mill furnish in a papermaking system into a cellulosic sheet comprising: adding to a papermaking furnish from about 0.00005 to about 1.25% by weight, based on the dry weight of fiber in the furnish, of a borosilicate having a mole ratio of boron to silicon of from about 1:1000 to about 100:1, a mole ratio of alkali metal to silicon of from about 6:1000 to about 1.04:1, a particle size of from about 1 to 2000 nm; and a surface area of from about 15 to 3000 m2/g; and from about 0.001 to about 0.5% by weight, based on the dry weight of fiber in the furnish of a substantially water soluble polymeric flocculent having a molecular weight greater than 500,000 Daltons; subjecting the furnish to papermaking conditions; and recovering a cellulosic sheet.