A New Development of PAM Based Micro-particle Polymer Dispersion

Abstract

From environmental protection point of view, use of recycled fibre has been increasing in Japanese paper and paperboard industry. Demand of used paper has been increasing not only in domestic but also overseas. Quality of recycled fibre which has been used in domestic is getting lower and papermaking condition has become worse. Even in such severe condition, paper chemicals i.e. sizing agent, paper strength agent have to work effectively.In this report, newly developed PAM based polymer which will keep high coagulation force and will give final paper strong dry strength is described. New type PAM based polymer make it possible to obtain good results under severe condition. This new polymer agent is not aqueous solution but it is high molar weight polymer dispersion. Higher level of paper strength is achieved when the new type polymer is added in wet-end, and onepass retention of fibre and sizing efficiency are also encouraged.