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US 12,421,361 B2Granted
Water-soluble film including metal salts
AssigneeMonosol, LLC
InventorsDmitriy Davydovich, Ramaswamy Ramaswamy, Nicholas Alan Nelson
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Abstract
A water-soluble film comprising a mixture of a polyvinyl alcohol (PVOH) resin, a plasticizer, and a metal salt, wherein the metal salt is present in the water-soluble film in an amount sufficient to reduce the enthalpy of melting of the film by at least 20% compared to the enthalpy of melting of an otherwise identical film not comprising the metal salt.
Claims25
A water-soluble film, comprising:
- a mixture of a polyvinyl alcohol (PVOH) resin, a plasticizer, and a multivalent metal salt, wherein the multivalent metal salt is present in the water-soluble film in an amount sufficient to reduce the enthalpy of melting of the film by at least 20% compared to the enthalpy of melting of an otherwise identical film not comprising the multivalent metal salt,
- wherein the PVOH resin is present in the film in an amount of at least 50 wt. %, based on the total weight of the film, and
- wherein the multivalent metal salt comprises an inorganic anion.
A water-soluble film comprising a mixture of a polyvinyl alcohol (PVOH) resin, a plasticizer, and a lithium salt.
A water-soluble film, comprising:
- a mixture of a polyvinyl alcohol (PVOH) resin, a plasticizer, and a salt, wherein the film has a resistance in a dry state of less than about 60 MΩ (megaohms), or less than about 50 MΩ, or less than about 40 MΩ, or less than about 30 MΩ, as measured according to the Resistance Test Method.
A water-soluble fiber, comprising:
- a mixture of a polyvinyl alcohol resin, a plasticizer, and a multivalent metal salt, wherein the multivalent metal salt is present in the water-soluble fiber in an amount sufficient to reduce the enthalpy of melting of the film by at least 20% compared to the enthalpy of melting of an otherwise identical fiber not comprising the multivalent metal salt,
- wherein the polyvinyl alcohol resin is present in the fiber in an amount of at least 50 wt. %, based on the total weight of the film, and
- wherein the multivalent metal salt comprises an inorganic anion.
Dependencies are inferred from the claim text.