PROCESS FOR THE PRODUCTION OF PAPER
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Accused Products
Abstract
The present invention relates to 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 subsequent a centri-screen: (a) a first anionic component which is a water-soluble anionic anionic polysaccharide; (b) a second anionic component which is a water-dispersible or branched acrylamide-based polymer; and (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.
8 Citations
47 Claims
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1-33. -33. (canceled)
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34. A process for producing paper which comprises:
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(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 polysaccharide; (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. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification