Water-soluble polyvinyl alcohol blend film, related methods, and related articles

A water-soluble film comprising:

• a polyvinyl alcohol (PVOH) resin blend comprising:
• a first PVOH copolymer comprising a first anionic monomer unit, the first anionic monomer unit comprising maleic anhydride or an alkali metal salt of maleic anhydride, wherein the first anionic monomer unit is present in the first PVOH copolymer in an amount between about 1 mol % and about 3 mol %;
• and
• a second PVOH copolymer comprising a second anionic monomer unit, the second anionic monomer unit comprising maleic anhydride or an alkali metal salt of maleic anhydride, wherein the second anionic monomer unit is present in the second PVOH copolymer in an amount between about 3 mol % and 10 mol %;
• wherein the first PVOH copolymer is provided in the blend in an amount in a range of about 10 wt. % to about 70 wt. %, based on the total weight of the PVOH resin blend and the amount of first anionic monomer unit present in the first PVOH copolymer is different from the amount of second anionic monomer unit present in the second PVOH copolymer.