Patent ID: 7740742
Filing Date: 2010-06-22
Classification: B01D,D21H

Abstract:
1. A method of producing a pulp sheet, comprising adding a powder composition directly to a pulp slurry or adding a dispersion of the powder composition in water to the pulp slurry, the powder composition comprising a hydrophobic organic compound (A) to be used as a paper manufacturing agent, an emulsifying and dispersing agent (B), and a water-soluble saccharide (C), wherein the powder composition has an average particle diameter of 10 to 700 μm, and wherein the hydrophobic organic compound (A) is at least one compound selected from the group consisting of the following groups (i) to (viii), and mixtures thereof: (i) organopolysiloxane compounds; (ii) amine compounds; (iii) amine acid salt compounds; (iv) quaternary ammonium compounds; (v) imidazole compounds; (vi) hydrocarbon compounds; (vii) alcohol compounds; and (viii) at least one compound having a carbonyl group and an alkyl group in a molecule and selected from the group consisting of the following groups (viii-a) to (viii-d), and mixtures thereof: (viii-a) aliphatic acids or their addition products of alkylene oxide having 2 to 4 carbon atoms; (viii-b) esters of aliphatic acids and alcohols or their addition products of alkylene oxide having 2 to 4 carbon atoms; (viii-c) aliphatic acid amides or their addition products of alkylene oxide having 2 to 4 carbon atoms; and (viii-d) aliphatic acid amideamines or their addition products of alkylene oxide having 2 to 4 carbon atoms; wherein the water-soluble saccharide (C) is selected from the group consisting of dextrin, maltodextrin, cyclodextrin, and octenylsuccinic acid starch; wherein the hydrophobic organic compound (A) and the emulsifying and dispersing agent (B) are evenly dispersed and enclosed within the water-soluble saccharide (C); and wherein the emulsifying and dispersing agent (B) is a copolymer comprising composing units derived from at least one kind of non-ionic monomer having a dissolution parameter of 20.5 (MPa)