Polyvinyl alcohol powder and method for producing same

The present invention is characterized by being a polyvinyl alcohol powder which has an average particle diameter of 100 to 2000 um as measured on an optical microscope at a humidity of 65% RH and a temperature of 25oC, in which a portion having particle diameters of 500 to 1000 um has a bulk density (g/ml) of 0.60 to 0.80 exclusive and the content of a portion having particle diameters of 500 to 1000 um is 35 to 70% by mass. Thus, a polyvinyl alcohol powder is provided, which has good scattering resistance, exhibits excellent solubility when an aqueous solution is prepared from the polyvinyl alcohol powder that has a powdery form, and for which the transportation cost can be reduced due to the high density thereof. 聚乙烯醇粉体，其特征在于，在湿度65%RH、温度25℃下通过光学显微镜观察进行测定时的平均粒径为100~2000μm，粒径为500~1000μm的部分的体积比重（g/ml）超过0.60且低于0.80，且粒径为500~1000μm的部分的比例为35~70质量%。由此，提供耐飞散性良好、由粉体形状制备水溶液时的溶解性优异、并且因比重大而能够降低运输成本的聚乙烯醇粉体。