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John Langley, David Holroyd: Production of paper and paperboard. Allied Colloids, Ostrolenk Faber Gerb & Soffen, June 28, 1988: US04753710 (177 worldwide citation)

Paper or paper board is made by passing an aqueous cellulosic suspension through a centriscreen or other shear device and then draining the purified suspension, and an improved combination of retention, drainage, drying and formation is achieved by adding to the suspension an excess of high molecula ...


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Henry R Hernandez, Donald S Greif, Albert N Barna, Douglas S Thornton: Process for the production of paper containing starch fibers and the paper produced thereby. National Starch and Chemical Corporation, James & Franklin, January 6, 1981: US04243480 (82 worldwide citation)

A process for the production of paper and paperboard is disclosed wherein water-insensitive starch fibers, produced by extrusion of a starch dispersion into a coagulating solution, are employed to replace all or part of the cellulosic or other pulp conventionally employed. There is also disclosed a ...


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Arthur P Derrick: Colloidal composition and its use in the production of paper and paperboard. Laporte, Kane Dalsimer Sullivan Kurucz Levy Eisele and Richard, May 14, 1991: US05015334 (29 worldwide citation)

The composition comprises a water dispersible colloidal siliceous material, such as a swelling clay, in intimate association with a low molecular weight water soluble high anionic charge density organic polymer, such as a polyacrylic acid or a polyamine, the ionicity of the siliceous material being ...


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Hans Juergen Degen, Sigberg Pfohl, Volkmar Weberndoerfer, Gerd Rehmer, Michael Kroener, Andreas Stange: Production of paper and paperboard of high dry strength. BASF Aktiengesellschaft, Oblon Fisher Spivak McClelland & Maier, April 4, 1989: US04818341 (24 worldwide citation)

Paper and paperboard of high dry strength are produced by adding a dry strength enhancer to the paper stock and dewatering the paper stock with sheet formation by using as the dry strength enhancer a mixture of a cationic polymer which contains as characteristic monomers copolymerized units of


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Arthur P Derrick: Colloidal composition and its use in the production of paper and paperboard. Laporte, Kane Dalsimer Sullivan Kurucz Levy Eisele and Richard, November 5, 1996: US05571379 (10 worldwide citation)

The composition comprises a water dispersible colloidal siliceous material, such as a swelling clay, in intimate association with a low molecular weight water soluble high charge density organic polymer, such as a polyacrylic acid or a polyamine, the ionicity of the siliceous material being signific ...


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Derrick Arthur Percy: Colloidal composition and its use in the production of paper and paperboard.. Laporte, June 20, 1990: EP0373306-A2 (6 worldwide citation)

The composition comprises a water dispersible colloidal siliceous material, such as a swelling clay, in intimate association with a low molecular weight water soluble high charge density organic polymer, such as a polyacrylic acid or a polyamine, the ionicity of the siliceous material being signific ...


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Ludwig Krapsch, Christopher John McGregor, Jean Mallard de La Varende: Method for increasing the advantages of starch in pulped cellulosic material in the production of paper and paperboard. Hercules Incorporated, Joanne Rossi, Michael Herman, June 24, 2014: US08758562 (3 worldwide citation)

The invention relates to a method for increasing the benefit from starch in pulped, preferably repulped cellulosic material at paper or paperboard manufacturing comprising the steps of (a) pulping a cellulosic material containing a starch; (b) treating the cellulosic material containing the starch w ...


10
Neil A Hartman: Iron salts as retention agents. Eaglebrook, Rockey and Rifkin, January 21, 1992: US05082528 (3 worldwide citation)

Iron salts hydrolyzable to ferric hydroxide are provided as retention agents for size in the production of paper and paperboard to aid in water repellence, reduce pollutants, and create other beneficial effects.