Water-soluble film and packaging
AssigneeKuraray Co., Ltd.
InventorsMinoru Okamoto, Sayaka Shimizu, Osamu Kazeto
Life of this patent
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Abstract
[Problem to be solved] To provide a water-soluble film capable of achieving both cold water solubility and resistance to oxidative deterioration. [Solution] A water-soluble film containing a polyvinyl alcohol resin, wherein the water-soluble film has a surface on at least one side in which an abundance ratio of carbonyl in all carbon bonds obtained by X-ray photoelectron spectroscopy is 1 to 5%, and a complete dissolution time in water at 10° C. is 120 seconds or less.
Claims19
A water-soluble film containing at least 50% by mass of a polyvinyl alcohol resin, and a nonionic surfactant including a dialkanolamide of an aliphatic dicarboxylic acid,
- wherein the water-soluble film has a surface on at least one side in which an abundance ratio of carbonyl in all carbon bonds obtained by X-ray photoelectron spectroscopy is in the range of 1 to 5%, and a complete dissolution time in water at 10° C. is 120 seconds or less.
Dependencies are inferred from the claim text.