Fibrous structures comprising particles and methods for making same
Fibrous structures containing one or more particles, and methods for making same are provided.
1. A unitary fibrous structure comprising a plurality of meltblown fibrous elements and a plurality of discrete water-soluble, active agent-containing particles present within the unitary fibrous structure and dispersed throughout the plurality of meltblown fibrous elements, wherein at least one of the water-soluble, active agent-containing particles comprises an active agent selected from the group consisting of: hair care agents, hair colorant agents, hair conditioning agents, and mixtures thereof and at least one of the meltblown fibrous elements comprises one or more fibrous element-forming materials and one or more active agents present 1) within the meltblown fibrous element at a level of greater than 20% by weight on a dry fibrous element basis; 2) in the unitary fibrous structure at a level of greater than 20% by weight on a dry fibrous structure basis; or 3) both.
2. The unitary fibrous structure according to claim 1 wherein one or more of the fibrous elements are water-soluble.
3. The unitary fibrous structure according to claim 1 wherein the fibrous elements comprise one or more filaments.
4. The unitary fibrous structure according to claim 1 wherein the one or more active agents present within the fibrous element comprises a surfactant.
5. The unitary fibrous structure according to claim 4 wherein the surfactant is selected from the group consisting of: anionic surfactants, cationic surfactants, nonionic surfactants, zwitterionic surfactants, amphoteric surfactants, and mixtures thereof.
6. The unitary fibrous structure according to claim 1 wherein at least one of the one or more active agents is in the form of a particle exhibiting a median particle size of 20 μm or less.
7. The unitary fibrous structure according to claim 6 wherein the particle comprises a perfume microcapsule.
8. The unitary fibrous structure according to claim 1 wherein the one or more fibrous element-forming materials comprises a polymer.
9. The unitary fibrous structure according to claim 8 wherein the polymer is selected from the group consisting of: pullulan, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl pyrrolidone, carboxymethyl cellulose, sodium alginate, xanthan gum, tragacanth gum, guar gum, acacia gum, Arabic gum, polyacrylic acid, methylmethacrylate copolymer, carboxyvinyl polymer, dextrin, pectin, chitin, levan, elsinan, collagen, gelatin, zein, gluten, soy protein, casein, polyvinyl alcohol, carboxylated polyvinyl alcohol, sulfonated polyvinyl alcohol, starch, starch derivatives, hemicellulose, hemicellulose derivatives, proteins, chitosan, chitosan derivatives, polyethylene glycol, tetramethylene ether glycol, hydroxymethyl cellulose, and mixtures thereof.
10. The unitary fibrous structure according to claim 1 wherein at least one of the water-soluble, active agent-containing particles comprises a median particle size of from about 1 μm to about 1600 μm.
11. The unitary fibrous structure according to claim 1 wherein a plurality of the water-soluble, active agent-containing particles are present in the unitary fibrous structure at a basis weight of from about 1 g/m 2 to about 5000 g/m 2 .
12. The unitary fibrous structure according to claim 11 wherein the plurality of water-soluble, active agent-containing particles are present in the unitary fibrous structure in two or more layers.
13. The unitary fibrous structure according to claim 1 wherein the fibrous elements are present in the unitary fibrous structure at a basis weight of from about 1 g/m 2 to about 3000 g/m 2 .
14. The unitary fibrous structure according to claim 13 wherein the fibrous elements are present in the unitary fibrous structure in two or more layers.
15. The unitary fibrous structure according to claim 1 wherein at least one of the water-soluble, active agent-containing particles comprises a perfume microcapsule.
16. The unitary fibrous structure according to claim 1 wherein at least one of the fibrous elements exhibits an average diameter of less than 50 μm.
17. The unitary fibrous structure according to claim 1 wherein the unitary fibrous structure exhibits a dissolution time of less than 3600 seconds.
18. The unitary fibrous structure according to claim 1 wherein at least one of the fibrous elements comprises a coating composition present on an external surface of the fibrous element.
19. A multi-ply fibrous structure comprising at least one ply of a unitary fibrous structure according to claim 1 wherein the one or more water-soluble, active agent-containing particles are positioned between the at least one ply of unitary fibrous structure and a second ply of fibrous structure.