Water-soluble packets

Abstract

The disclosure provides a water soluble pouch including at least two sealed compartments, the pouch including outer walls including water soluble film including a water soluble resin, and an inner wall including water soluble film including a water soluble resin, the outer wall films being sealed to the inner wall film, the outer wall films being characterized by: a dissolution time of 300 seconds or less, the water soluble resin of the outer wall films having a viscosity in a range of 14.5 cP to 25 cP, and a pouch strength of at least 200 N, and the inner wall film being characterized by: a dissolution time of 300 seconds or less, the water soluble resin of the inner film having viscosity in a range of 12 cP to 14.5 cP, and a tackiness value of at least 1500 g/s.

What is claimed: 
     
         1 . A water soluble pouch comprising at least two sealed compartments, the pouch comprising
 outer walls comprising water soluble film comprising a water soluble resin;   and an inner wall comprising water soluble film comprising a water soluble resin;   the outer wall films being sealed to the inner wall film;
 the outer wall films being characterized by
 a dissolution time of 300 seconds or less in water at a temperature of 20° C. for an outer wall film having a thickness of about 76 micron in accordance with MonoSol Test Method MSTM-205; 
 the water soluble resin of the outer wall films having a 4% solution viscosity at 20° C. in a range of 14.5 cP to 25 cP; and 
 a pouch strength of at least 200 N as measured by the outer wall film sealed and tested according to the Pouch Strength Test; and 
 
 the inner wall film being characterized by:
 a dissolution time of 300 seconds or less in water at a temperature of 20° C. for an inner wall film having a thickness of about 76 micron in accordance with MonoSol Test Method MSTM-205; 
 the water soluble resin of the inner film having a 4% solution viscosity at 20° C. in a range of 12 cP to 14.5 cP; and 
 a tackiness value of at least 1500 g/s for an inner film tested according to the Tackiness PA Test. 
 
   
     
     
         2 . The water soluble pouch of  claim 1 , wherein the water soluble resin of the outer wall film comprises a polyvinyl alcohol or copolymer thereof. 
     
     
         3 . The water soluble pouch of  claim 1 , wherein the water soluble resin of the inner wall film comprises a polyvinyl alcohol or a copolymer thereof. 
     
     
         4 . The water soluble pouch of  claim 1 , wherein the water soluble resin of the outer wall film comprises a blend of a polyvinyl alcohol homopolymer and a polyvinyl alcohol copolymer comprising an anionic monomer unit. 
     
     
         5 . The water soluble pouch of  claim 4 , wherein blend comprises from 30 to 100 weight percent of the polyvinyl alcohol copolymer comprising an anionic monomer unit and from 0 to 70 weight percent of the polyvinyl alcohol homopolymer, based on the total weight of polyvinyl alcohol in the film. 
     
     
         6 . The water soluble pouch of  claim 5 , wherein the blend comprises from 30 to 70 weight percent of the polyvinyl alcohol copolymer comprising an anionic monomer unit, based on the total weight of polyvinyl alcohol in the film. 
     
     
         7 . The water soluble pouch of  claim 1 , wherein the water soluble resin of the inner wall film comprises a blend of one or more polyvinyl alcohol homopolymers and a polyvinyl alcohol copolymer comprising an anionic monomer unit. 
     
     
         8 . The water soluble pouch of  claim 7 , wherein blend comprises from 30 to 100 weight percent of the polyvinyl alcohol copolymer comprising an anionic monomer unit and from 0 to 70 weight percent of the one or more polyvinyl alcohol homopolymers, based on the total weight of polyvinyl alcohol in the film. 
     
     
         9 . The water soluble pouch of  claim 8 , wherein the blend comprises from 30 to 70 weight percent of the polyvinyl alcohol copolymer comprising an anionic monomer unit, based on the total weight of polyvinyl alcohol in the film. 
     
     
         10 . The water soluble pouch of  claim 4  or  claim 7 , wherein the anionic monomer unit is selected from the group consisting of vinyl acetic acid, alkyl acrylates, maleic acid, monoalkyl maleate, dialkyl maleate, monomethyl maleate, dimethyl maleate, maleic anhydride, fumaric acid, monoalkyl fumarate, dialkyl fumarate, monomethyl fumarate, dimethyl fumarate, fumaric anhydride, itaconic acid, monomethyl itaconate, dimethyl itaconate, itaconic anhydride, citraconic acid, monoalkyl citraconate, dialkyl citraconate, citraconic anhydride, mesaconic acid, monoalkyl mesaconate, dialkyl mesaconate, mesaconic anhydride, glutaconic acid, monoalkyl glutaconate, dialkyl glutaconate, glutaconic anhydride, vinyl sulfonic acid, alkyl sulfonic acid, ethylene sulfonic acid, 2-acrylamido-1-methyl propane sulfonic acid, 2-acrylamide-2-methylpropanesulfonic acid, 2-methylacrylamido-2-methylpropanesulfonic acid, 2-sulfoethyl acrylate, alkali metal salts of the foregoing, esters of the foregoing, and combinations of the foregoing. 
     
     
         11 . The water soluble pouch of  claim 10 , wherein the anionic monomer unit comprises one or more of maleic acid, monoalkyl maleate, dialkyl maleate, monomethyl maleate, dimethyl maleate, maleic anhydride, alkali metal salts of the foregoing and combinations thereof. 
     
     
         12 . The water soluble pouch of  claim 11 , wherein the maleic acid is selected from the group consisting of maleic acid, monomethyl maleate, dimethyl maleate, maleic anhydride, alkali metal salts of the foregoing, esters of the foregoing, and combinations thereof. 
     
     
         13 . The water soluble pouch of  claim 4  or  claim 7 , wherein the polyvinyl alcohol copolymer comprises from 2 to 8 mol % of the anionic monomer unit, or 1 to 4 mol % of the anionic monomer unit. 
     
     
         14 . The water soluble pouch of  claim 2 , wherein the water soluble resin of the outer wall film comprises a degree of hydrolysis in a range of 87 to 93, or if a blend of polyvinyl alcohol resins is used then the arithmetic weight average degree of hydrolysis is in a range of 87 to 93. 
     
     
         15 . The water soluble pouch of  claim 3 , wherein the water soluble resin of the inner wall film comprises a degree of hydrolysis in a range of 87 to 93, or if a blend of polyvinyl alcohol resins is used then the arithmetic weight average degree of hydrolysis is in a range of 87 to 93. 
     
     
         16 . The water soluble pouch of  claim 1 , wherein water soluble resin of the outer wall films has a 4% solution viscosity at 20° C. in a range of 14.5 cP to 21 cP. 
     
     
         17 . The water soluble pouch of  claim 16 , wherein the water soluble resin of the outer wall films has a 4% solution viscosity at 20° C. in a range of 15.5 cP to 20 cP. 
     
     
         18 . The water soluble pouch of  claim 1 , wherein the outer wall films each are characterized by a pouch strength of less than 2000 N as measured by the outer wall film sealed, conditioned, and tested according to the Pouch Strength Test. 
     
     
         19 . The water soluble pouch of  claim 1 , wherein the pouch has a pouch strength of at least 200 N as measured by the Pouch Strength Test. 
     
     
         20 . The water soluble pouch of  claim 1 , wherein the inner wall film has a thickness of at least 75 micron. 
     
     
         21 . The water soluble pouch of  claim 1 , wherein the outer wall films further comprise an aversive agent. 
     
     
         22 . The water soluble pouch of  claim 1 , wherein the inner wall films further comprise an aversive agent. 
     
     
         23 . The water soluble pouch of  claim 1 , wherein the thickness of each of the outer wall films does not vary from the thickness of the inner wall film by more than 10% for non-thermoformed films. 
     
     
         24 . The water soluble pouch of  claim 1 , wherein a detergent composition is enclosed in the pouch. 
     
     
         25 . The water soluble pouch of  claim 1 , wherein the outer wall water soluble resin is not the same as the inner wall water soluble resin. 
     
     
         26 . A water soluble pouch comprising
 at least two outer walls comprising water soluble film comprising a water soluble resin;   and at least one inner wall comprising water soluble film comprising a water soluble resin; the at least one inner wall having a first side and a second side and a thickness therebetween;   the at least two outer wall films being sealed to the at least one inner wall film to form a compartment; wherein the at least two outer wall films are not sealed to the same side of the at least one inner wall such that at least two compartments are formed;
 the outer wall films being characterized by
 a dissolution time of 300 seconds or less in water at a temperature of 20° C. for an outer wall film having a thickness of about 76 micron in accordance with MonoSol Test Method MSTM-205; 
 the water soluble resin of the outer wall films having a 4% solution viscosity at 20° C. in a range of 14.5 cP to 25 cP; and 
 a pouch strength of at least 200 N as measured by the outer wall film sealed and tested according to the Pouch Strength Test; and 
 
 the inner wall film being characterized by:
 a dissolution time of 300 seconds or less in water at a temperature of 20° C. for an inner wall film having a thickness of about 76 micron in accordance with MonoSol Test Method MSTM-205; 
 the water soluble resin of the inner film having a 4% solution viscosity at 20° C. in a range of 12 cP to 14.5 cP; and 
 a tackiness value of at least 1500 g/s for an inner film tested according to the Tackiness PA Test.