Patent ID: 6193844
Filing Date: 2001-02-27
Classification: B02C,D21H

Abstract:
A process for making paper from an alkaline furnish, the process comprising:a) adding a cationic starch to the furnish;b) adding a cationic polyelectrolyte flocculant to the furnish; andc) adding to the furnish a microparticle composition comprising finely divided particles of a water insoluble, solid compound selected from the group consisting of amorphous alumino silicates, mixed crystalline/amorphous aluminosilicates, and diatomaceous earth, the solid compound having an anionic charge of at least 20 millivolts and a particle size of no greater than about 0.1 micron, a fluid vehicle, and a dispersion agent selected from the group consisting of wetting agents and anionic surfactants.