| abstract |
The present invention provides a water-soluble packaging film capable of preventing poor appearance, such as fogging, and lowering of sealing properties, especially heat-sealing properties, for a long period of time, and being less likely to deteriorate after packaging, and capable of achieving excellent water solubility. The present invention is a water-soluble packaging film, which contains polyvinyl alcohol, a plasticizer and a dicarboxylic acid containing hydroxyl groups, and the hydroxyl group coefficient obtained by dividing the weight average molecular weight of the dicarboxylic acid containing hydroxyl groups by the number of hydroxyl groups is: 90 or more, and content of the said hydroxyl-containing dicarboxylic acid is 1-5 weight part. |