Water-soluble film, method of manufacturing same, and package

Abstract

Provided are a water-soluble film having excellent solubility in water and capable of reducing the stickiness of the contact surfaces to each other at the edges during storage in rolls, a production method thereof, and a package using the water-soluble film. A water-soluble film of the present invention includes a polyvinyl alcohol resin. The water-soluble film satisfies a formula (1) below when amounts of crystalline component are respectively (A1)0, (A1)60, and (A1)180, the amounts being obtained from a spin-spin relaxation curve by 1H pulse NMR measurement of the water-soluble film immediately after, 60 seconds after, and 180 seconds after the water-soluble film is immersed in a mixed solution of deuterated water and deuterated methanol mixed at a volume ratio of 1:1 at 5° C. ( Math ⁢ ⁢ 1 ) 0.2 < ( A ⁢ ⁢ 1 ) 60 / ( A ⁢ ⁢ 1 ) 0 < 0.6 ⁢ ⁢ and ⁢ ⁢ ( A ⁢ ⁢ 1 ) 180 / ( A ⁢ ⁢ 1 ) 0 < ( A ⁢ ⁢ 1 ) 60 / ( A ⁢ ⁢ 1 ) 0 ( 1 )

Dependencies are inferred from the claim text.