PURPOSE: To efficiently prepare a granule easy to handle and having uniform density, by granulating a mixture of an org. fiber substance and a water-soluble polymer powder into the granule with density of 0.5W1.8g/cm3 using a roll type extrusion granulator.
CONSTITUTION: An org. fiber substance and a water-soluble polymer powder are mixed in a mechanical mixer such as a conical blender or a mortar mixer. The resulting mixture is granulated into a granule with a density of 0.5W1.8g/cm3 using a roll type extrusion granulator of a type continuously extruding a substance to be granulated from a die under pressure by a roll. The org. fiber substances, are exemplified by mechanical pulp, chemical pulp, regenerated pulp, cotton, sawdust, etc. As the polymer powder, a nonionic polymer such as polyacrylamide and an anionic polymer such as sodium polyacrylate are used.
HASEGAWA YOICHI
FUJIURA YOJI
