The water soluble film forming material includes poly vinyl alcohol, polyvinyl pyrrolidone, sodium alginate, hydroxy propyl cellulose, hydroxy propyl methyl cellulose etc.

• 水溶性成膜材料包括：聚乙烯醇、聚乙烯吡咯烷酮、海藻酸钠、羟丙基纤维素、羟丙基甲基纤维素等。