Improving Runnability of Papermaking Machine through Optimization of Wet-end Operation
Koichi Tadaki, Munetoshi Yamaji, Tomoko Asada, Kenji Tsunekawa · JAPAN TAPPI JOURNAL · 2003
Under world-wide increasing concerns for environmental issues and as an influence of the trend toward neutrality of papermaking conditions, difficulties are being added tothe paper stock situations year after year. Increased mix of deinked pulp or coated broke not only deteriorates the wet-end properties such as fiber retention and drainage and paper quality such as paper strength, sizing, etc., but also is responsible for stain troubles in papermaking equipment. Countermeasures against stain on a papermaking machine are currently one of the major problems for improving productivity and runnability. In a papermaking machine system, slime troubles due to microorganisms and foreign matters such as pitches, anion trashes, etc. are sources of stain in correlation each to the other. It is believed therefore that a possibility would be accomplished for improvements of productivity and runnability by totally addressing these matters together and by undertaking rapid and adequate action therefor.By utilizing the know-how accumulated over years for handling microorganisms with a slime controlling agent as the center item and the experience relative to “Realizer” as a wet-end improver which addresses foreign matters such as pitches and anion trashes, we are makingvarious proposals for countermeasures against stain troubles in a papermaking machine addressed totally and analyzed as a comprehensive matter.