| abstract |
The present invention relates to a polyvinyl alcohol-based polymer film comprising a polyvinyl alcohol-based polymer film of a polyvinyl alcohol-based polymer (A), which contains at least one metal selected from the group consisting of transition metals and aluminum. In the element (B), the content of the metal element (B) is 0.2 ppm or more and 50 ppm or less based on the polyvinyl alcohol polymer (A). The metal element (B) is preferably at least one metal element selected from the group consisting of chromium, iron, cobalt, manganese, nickel, titanium, zinc, copper, and aluminum. The metal element (B) is preferably iron. The metal element (B) is preferably contained as a metal compound. |