Blendinging ones, and the gelatinization paper reinforcing agent, and the paper manufacture mannered null amphoteric

摘要

PROBLEM TO BE SOLVED: To provide a method for producing paper having excellent strength, by which yield and freeness of finally obtained paper are improved by bettering effects of flocculation and fixation of conventional amphoteric protein and increasing flocculation effect of paper stock slurry.;SOLUTION: The mixture for gelatinized paper-strengthening agent comprises amphoteric protein and an aluminum compound. The gelatinized paper-strengthening agent is produced by gelatinizing an aqueous slurried mixture containing amphoteric starch and an aluminum compound. The method for producing paper comprises a process for forming a gelatinized paper-strengthening agent by forming and gelatinizing an aqueous slurried mixture containing a fixed amount of amphoteric starch and an aluminum compound and a process for adding a fixed amount of the gelatinized paper-strengthening agent to a paper stock slurry.;COPYRIGHT: (C)2007,JPO&INPIT