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Process for the production of paper

  • US 8,613,832 B2
  • Filed: 02/15/2012
  • Issued: 12/24/2013
  • Est. Priority Date: 05/16/2005
  • Status: Expired due to Fees
First Claim
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1. A process for producing paper which comprises:

  • (i) providing an aqueous suspension comprising cellulosic fibres,(ii) adding to the suspension after the last point of high shear and subsequent a centri-screen;

    (a) a first anionic component which is a water-soluble anionic acrylamide-based polymer;

    (b) a second anionic component which is a water-dispersible or branched acrylamide-based polymer;

    (c) a third anionic component which is an anionic siliceous material comprising an anionic silica-based polymer comprising anionic silica-based particles having a specific surface area within the range of from 100 to 1700 m2/g;

    (iii) dewatering the obtained suspension to form paper.

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