Water-soluble unit dose articles comprising perfume

Abstract

Described herein is a household care composition, which delivers active agents onto fabric, in the form of a water-soluble unit dose article comprising a water-soluble fibrous structure and an encapsulated perfume composition, as well as methods for making the article and methods for treating fabrics using the article.

What is claimed is: 
     
         1 . A water-soluble unit dose article comprising a water-soluble fibrous first ply superposed to a water-soluble fibrous second ply, where an encapsulated perfume composition is positioned between the superposed plies, where the water-soluble unit dose article comprises from about 0.1% to about 5% by weight of the encapsulated perfume. 
     
     
         2 . The water-soluble unit dose article according to  claim 1 , wherein the water-soluble unit dose article has less than about 15% by weight water. 
     
     
         3 . The water-soluble unit dose article according to  claim 1 , wherein the water-soluble unit dose article is substantially free of water. 
     
     
         4 . The water-soluble unit dose article according to  claim 1 , wherein the first ply comprises at least two layers, a first layer and a second layer, the first layer facing the second layer, wherein the second ply comprises at least two layers, a third layer and a fourth layer, the third layer facing the fourth layer, wherein said first layer is oriented towards a first ply belt side and said second layer is oriented towards a first ply air side, wherein said first ply air side is opposite said first ply belt side, wherein said third layer is oriented towards a second ply belt side and said fourth layer is oriented towards a second ply air side, wherein said second ply air side is opposite said second ply belt side, wherein said first ply belt side and said second ply belt side face away from one another, and wherein said encapsulated perfume composition is positioned between the second layer and the fourth layer. 
     
     
         5 . The water-soluble unit dose article according to  claim 4 , wherein the first layer and the third layer are substantially free of the encapsulated perfume composition. 
     
     
         6 . The water-soluble unit dose article according to  claim 1 , wherein the water-soluble unit dose article further comprises a plurality of particles, preferably at least one of the particles comprises an active agent selected from the group consisting of a surfactant, a structurant, a builder, a polymeric dispersing agent, an enzyme, an enzyme stabilizer, a bleach system, a brightener, a hueing agent, a chelating agent, a suds suppressor, a conditioning agent, a humectant, a perfume, a perfume microcapsule, a filler or carrier, an alkalinity system, a pH control system, a buffer, an alkanolamine, mosquito repellant, and mixtures thereof. 
     
     
         7 . The water-soluble unit dose article according to  claim 1 , wherein the water-soluble unit dose article has a Basis Weight of from about 500 grams/m2 to about 5,000 grams/m2 as measured according to the Basis Weight Test Method described herein. 
     
     
         8 . The water-soluble unit dose article according to  claim 1 , wherein the water-soluble unit dose article has a width from about 1 cm to about 11 cm; a length from about 1 cm to about 20 cm; and a height from about 0.01 mm to about 50 mm. 
     
     
         9 . The water-soluble unit dose article according to  claim 1 , wherein the water-soluble unit dose article further comprises a third ply, wherein the first ply, the second ply, and the third ply are superposed with one another so that the third ply is between the first ply and the second ply. 
     
     
         10 . The water-soluble unit dose article according to  claim 9 , wherein the encapsulated perfume composition is positioned between the third ply and the first ply and/or between the third ply and the second ply. 
     
     
         11 . The water-soluble unit dose article according to  claim 9 , wherein the third ply comprises at least two layers, a fifth layer and a sixth layer, the fifth layer facing the sixth layer, wherein said third ply has a third ply belt side and a third ply air side opposite the third ply belt side, wherein said fifth layer is oriented towards a third ply belt side and said sixth layer is oriented towards a third ply air side, wherein said third ply air side is opposite said third ply belt side. 
     
     
         12 . The water-soluble unit dose article according to  claim 1 , wherein the encapsulated perfume composition has a viscosity of from about 1 Pa-s to about 25 Pa-s when measured at 10 s −1  at 20° C. as determined according to the Shear Viscosity Test Method described herein. 
     
     
         13 . The water-soluble unit dose article according to  claim 1 , wherein the encapsulated perfume composition penetrates less than about 20% of any single ply. 
     
     
         14 . A water-soluble unit dose article comprising a water-soluble fibrous first ply superposed to a water-soluble fibrous second ply, wherein an encapsulated perfume composition is positioned between the superposed plies, wherein the encapsulated perfume composition has a viscosity of from about 4 Pa-s to about 200 Pa-s when measured at 1 s −1  at 20° C. as determined according to the Shear Viscosity Test Method described herein. 
     
     
         15 . The water-soluble unit dose article according to  claim 14 , wherein the water-soluble unit dose article has less than about 15% by weight water. 
     
     
         16 . The water-soluble unit dose article according to  claim 14 , wherein the water-soluble unit dose article is substantially free of water. 
     
     
         17 . The water-soluble unit dose article according to  claim 14 , wherein the first ply comprises at least two layers, a first layer and a second layer, the first layer facing the second layer, wherein the second ply comprises at least two layers, a third layer and a fourth layer, the third layer facing the fourth layer, wherein said first layer is oriented towards a first ply belt side and said second layer is oriented towards a first ply air side, wherein said first ply air side is opposite said first ply belt side, wherein said third layer is oriented towards a second ply belt side and said fourth layer is oriented towards a second ply air side, wherein said second ply air side is opposite said second ply belt side, wherein said first ply belt side and said second ply belt side face away from one another, and wherein said encapsulated perfume composition is positioned between the second layer and the fourth layer. 
     
     
         18 . The water-soluble unit dose article according to  claim 17 , wherein the first layer and the third layer are substantially free of the encapsulated perfume composition. 
     
     
         19 . The water-soluble unit dose article according to  claim 14 , wherein the water-soluble unit dose article further comprises a plurality of particles, preferably at least one of the particles comprises an active agent selected from the group consisting of a surfactant, a structurant, a builder, a polymeric dispersing agent, an enzyme, an enzyme stabilizer, a bleach system, a brightener, a hueing agent, a chelating agent, a suds suppressor, a conditioning agent, a humectant, a perfume, a perfume microcapsule, a filler or carrier, an alkalinity system, a pH control system, a buffer, an alkanolamine, mosquito repellant, and mixtures thereof. 
     
     
         20 . A process for manufacturing a water-soluble unit dose article comprising the steps of:
 providing a water soluble fibrous first ply;   providing a water soluble fibrous second ply, preferably formed on a surface other than said first ply, wherein said second ply is separate from said first ply;   providing an encapsulated perfume composition according to any one of the preceding claims; placing said encapsulated perfume composition on one or both of said first ply and said second ply;   superposing said first ply and said second ply so that said encapsulated perfume composition is between said first ply and said second ply; and   joining a first portion of said first ply to a second portion of said second ply to form said water soluble unit dose article.