Wet pulverizing of polysaccharides

The present invention is a method of and simultaneously each spray a dispersion of polysaccharide to a high pressure of 70 to 250 MPa from a pair of nozzles, collide the jet stream from each other pulverizing polysaccharides, high-pressure injection of the polysaccharide dispersion is injected from the pair of nozzle by the angle of the flow, injection flow to each other to adjust the grinding number to prepare and (or), adjusting the ejection frequency of a high-pressure fluid to chunghap collision with an appropriate angle at one point in the prior-than each of the nozzle exit, an average particle length of 1 / 4 that the degree of polymerization less degradation of the pulverized polysaccharide is characterized in that less than 10%, there is provided a wet grinding method of the polysaccharide. Further, according to the wet grinding method of the polysaccharides of the present invention, since the structure of the polysaccharide, to obtain a finely pulverized product of polysaccharide and not changed minimize the degree of polymerization reduction in accordance with the grinding, easy molding of polysaccharides including cellulose it becomes. Polysaccharides, dispersion, high pressure jet stream, a high-pressure fluid, a cellulose, chitin, chitosan