Patent ID: 11970673
Assignee: THE PROCTER & GAMBLE COMPANY
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B | IPC C

Claim 0:
1. A water-soluble unit dose article comprising at least a first compartment and a household care composition, wherein the household care composition is housed in the at least first compartment, wherein the unit dose article comprises:
a. a first water-soluble film, wherein the first water-soluble film has a first side and a second side, and wherein the first water soluble film comprises a first polyvinyl alcohol (PVOH) resin wherein the first polyvinyl alcohol resin comprises:
i. between 1% and less than about 65%, by weight of the first polyvinylalcohol resin, of a first polyvinyl alcohol polymer comprising carboxylated anionic monomer units and vinyl alcohol monomer units and optionally vinyl acetate monomer units; and wherein the carboxylated anionic monomer unit is derived from a member selected from the group consisting of maleic acid, monoalkyl maleate, dialkyl maleate, maleic anhydride, and combinations thereof;
ii. between about 35% and about 99%, by weight of the first polyvinylalcohol resin of a second PVOH polymer wherein the second PVOH polymer is a homopolymer wherein the homopolymer consists of vinyl alcohol monomer units and optionally yinyl acetate monomer units;

b. a second water-soluble film, wherein the second water-soluble film has a first side and a second side, and wherein the second water-soluble film comprises a second polyvinyl alcohol resin wherein the second polyvinyl alcohol resin comprises:
i. less than about 15% by weight of the second polyvinyl alcohol resin of a polyvinyl alcohol polymer comprising carboxylated anionic monomer units and vinyl alcohol monomer units and optionally vinyl acetate monomer units, and wherein the carboxylated anionic monomer unit is derived from a member selected from the group consisting of maleic acid, monoalkyl maleate, dialkyl maleate, maleic anhydride, and combinations thereof;
ii. from about 85% to about 100% by weight of the second polyvinyl alcohol resin of a polyvinyl alcohol homopolymer or a homopolymer blend, wherein the homopolymers consist of vinyl alcohol monomer units and optionallyvinyl acetate monomer units;

wherein the second polyvinyl alcohol resin has an average about 4% solution viscosity in deionised water at about 20° C. in a range of between about 8 mPa·s and less than about 12 mPa·s; and
wherein the first side of the first water-soluble film is sealed to the second side of the second water-soluble film to create the at least first compartment between the first water-soluble film and the second water-soluble film,
wherein the second polyvinyl alcohol resin comprises a blend of a first polyvinylalcohol homopolymer and a second polyvinylalcohol homopolymer, wherein the first polyvinyl alcohol homopolymer has an average viscosity in a range of between about 11 mPa·s and about 20 mPa·s, measured as a about 4% polyvinyl alcohol polymer solution in deionised water at about 20° C.; and the second polyvinyl alcohol homopolymer has an average viscosity in a range of between about 1 mPa·s and about 10 mPa·s, measured as a about 4% polyvinyl alcohol polymer solution in deionised water at about 20° C.