Patent ID: 7122098
Filing Date: 2006-10-17
Classification: D21H

Abstract:
1. A method for producing a pulp sheet comprising the steps of taking a compound for improving paper making quality, wherein said compound has a lyotropic degree as defined below of not less than 4%, and said compound provides the following paper quality improving properties (i) to (iii): (i) a standard improved bulky value of at least 0.02 g/cm (ii) a standard improved brightness of at least 0.7 point, and (iii) a standard improved opacity of at least 0.7 point; and wherein wherein α is the water content in a wet sheet obtained by adding 5 parts by weight of the compound to 100 parts by weight of pulp and subjecting the pulp to papermaking; and α adding the compound and an agent that promotes fixation of the compound onto the paper sheet to a material pulp before or during a papermaking step, and producing a pulp sheet.