Use of a first film and a second film to improve seal strength of a water-soluble
AssigneeMonosol, LLC
InventorsPhilip Frank Souter, Robby Renilde Francois Keuleers, Regine Labeque, Florence Catherine Courchay, Marc Rene Bert Renmans
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Abstract
The present invention relates to the use of a first water-soluble film and a second water-soluble film to make a unit dose article and the use of said unit dose article.
Claims39
Use of a first water-soluble film and a second water-soluble film in the manufacture of a water-soluble unit dose article optionally comprising a composition contained within the unit dose article, wherein the first water-soluble film and the second water-soluble film are sealed together along a seal area, in order to improve the seal strength in the seal area;
- wherein the first water-soluble film and the second water-soluble film are chemically different to one another and wherein the first water-soluble film has a first water capacity, and wherein the second water-soluble film has a second water capacity, wherein the first water capacity is less than the second water capacity, and wherein the difference between the water capacity of the first water soluble film and the second water-soluble film is between 0.01% and 1%;
- provided that when the composition is a fabric care or household care composition and a film comprises a blend of a polyvinyl alcohol homopolymer resin and an anionic polyvinyl alcohol copolymer resin, then both then first water soluble film and the second water soluble film comprise blends that include 65 wt. % or greater of an anionic polyvinyl alcohol copolymer resin;
- and
- provided that when the composition is a fabric care or household care composition and a film comprises a blend of at least two anionic polyvinyl alcohol copolymer resins, then both then first water soluble film and the second water soluble film comprise blends of at least two anionic polyvinyl alcohol copolymer resins.
A process for dosing a unit dose article comprising the steps of:
- obtaining a water-soluble unit dose article comprising at least a first water-soluble film, a second water-soluble film and a composition contained therein, wherein the first water-soluble film and the second water-soluble film are chemically different to one another, and wherein the first water-soluble film has a first water capacity, and wherein the second water-soluble film has a second water capacity, wherein the first water capacity is less than the second water capacity and wherein the difference between the water capacity of the first water soluble film and the second water-soluble film is between 0.01% and 1%;
- and
- contacting the water-soluble unit dose article with water to dissolve at least a portion of a film thereof, thereby releasing the composition;
- provided that when the composition is a fabric care or household care composition and a film comprises a blend of a polyvinyl alcohol homopolymer resin and an anionic polyvinyl alcohol copolymer resin, then both then first water soluble film and the second water soluble film comprise blends that include 65 wt. % or greater of an anionic polyvinyl alcohol copolymer resin;
- and
- provided that when the composition is a fabric care or household care composition and a film comprises a blend of at least two anionic polyvinyl alcohol copolymer resins, then both then first water soluble film and the second water soluble film comprise blends of at least two anionic polyvinyl alcohol copolymer resins.
Dependencies are inferred from the claim text.