Pouches comprising water-soluble fibrous wall materials and methods for making same
Pouches, for example pouches that contain one or more active agents, such as a fabric care active agent or dishwashing active agent and/or detergent compositions, and more particularly pouches employing a water-soluble fibrous wall material, pouches employing a fibrous wall material that ruptures during use, and methods for making same, are provided.
1. A water-soluble pouch comprising a water-soluble fibrous wall material comprising one or more filaments, wherein at least one of the filaments comprises a filament-forming polymer comprising a hydroxyl polymer selected from the group consisting of: pullulan, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose, sodium alginate, xanthan gum, tragacanth gum, guar gum, acacia gum, Arabic gum, polyacrylic acid, dextrin, pectin, chitin, collagen, gelatin, zein, gluten, soy protein, casein, polyvinyl alcohol, carboxylated polyvinyl alcohol, sulfonated polyvinyl alcohol, starch, ethoxylated starch, hemicellulose, proteins, chitosan, hydroxymethyl cellulose, and mixtures thereof, and one or more active agents present within the filament, wherein the water-soluble fibrous wall material defines an internal volume of the water-soluble pouch, wherein the water-soluble pouch further comprises an active agent within the internal volume of the water-soluble pouch, wherein the water-soluble pouch further comprises a discrete inner pouch present in the internal volume, wherein the inner pouch comprises a fibrous wall material that defines a second internal volume comprising an active agent, and wherein the water-soluble pouch ruptures as measured according to the Rupture Test Method.
2. The water-soluble pouch according to claim 1 wherein the water-soluble pouch exhibits an Average Rupture Time of less than 240 seconds as measured according to the Rupture Test Method.
3. The water-soluble pouch according to claim 1 wherein the one or more active agents present within the filament are releasable from the filament when the water-soluble pouch is exposed to conditions of intended use.
4. The water-soluble pouch according to claim 1 wherein a plurality of the filaments are inter-entangled to form the water-soluble fibrous wall material.
5. The water-soluble pouch according to claim 1 wherein the water-soluble pouch releases the active agent from the internal volume of the water-soluble pouch when the water-soluble pouch is exposed to conditions of intended use.
6. The water-soluble pouch according to claim 5 wherein the water-soluble pouch exhibits a % Weight Loss of less than 10% as measured according to the Shake Test Method.
7. The water-soluble pouch according to claim 1 wherein the water-soluble pouch exhibits a water content of from 0% to 20% as measured according to the Water Content Test Method.
8. The water-soluble pouch according to claim 1 wherein the water-soluble fibrous wall material is an apertured, water-soluble fibrous wall material.
9. The water-soluble pouch according to claim 1 wherein the inner pouch exhibits an Average Rupture Time equal to or greater than the Average Rupture Time of the water-soluble pouch as measured according to the Rupture Test Method.
10. A method for making a water-soluble pouch according to claim 1 , wherein the method comprises the steps of:
a. providing the water-soluble fibrous wall material comprising the one or more filaments;
b. forming the water-soluble pouch defining the internal volume from the water-soluble fibrous wall material; and
c. incorporating the active agent and the inner pouch within the internal volume of the water-soluble pouch.