Absorbent articles with improved odor control
View Patent ↗A technique for incorporating odor control agent particles into an absorbent article is provided. More specifically, the odor control particles are “homogenously” distributed (e.g., in a substantially uniform manner) within an airformed fiber matrix of an absorbent core of an absorbent article. An absorbent core containing such a homogeneously distributed odor control particles may possess a greater surface area for contacting malodorous compounds, thereby increasing the likelihood of odor reduction.
1. A method for forming an absorbent web with odor control properties, the method comprising:
treating a fibrous sheet with a coating formulation that comprises odor control particles;
fiberizing the treated sheet to form a plurality of individual fibers;
entraining the fibers in a gaseous stream; and
thereafter, depositing the fibers onto a forming surface to form a web comprising odor control particles, wherein substantially all of the odor control particles in the web originate from the treated sheet.
2. The method of claim 1 , wherein the odor control particles are inorganic oxide particles.
3. The method of claim 2 , wherein the inorganic oxide particles contain silica, alumina, or both.
4. The method of claim 3 , wherein the inorganic oxide particles are modified with a transition metal.
5. The method of claim 1 , wherein the odor control particles contain a quinone compound.
6. The method of claim 1 , wherein the odor control particles constitute from about 0.01 to about 20 wt. % of the coating formulation.
7. The method of claim 1 , wherein a solvent constitutes from about 40 to about 99 wt. % of the coating formulation.
8. The method of claim 1 , wherein the odor control particles are homogeneously distributed within the web.
9. The method of claim 1 , wherein the odor control particles are present in an amount of from about 0.1 to about 10 wt. % of the web.
10. The method of claim 1 , wherein the fibrous sheet is a fluff pulp sheet.
11. A method for forming an absorbent web with odor control properties, the method comprising:
treating a superabsorbent material with a coating formulation, the coating formulation comprising odor control particles;
fiberizing a fibrous sheet to form a plurality of individual fibers;
entraining the fibers in a gaseous stream;
intermixing substantially all of the treated superabsorbent material with the entrained fibers; and
thereafter, depositing the fibers and the treated superabsorbent material onto a forming surface to form a web comprising odor control particles, wherein substantially all of the odor control particles in the web originate from the treated superabsorbent material.
12. The method of claim 11 , wherein the odor control particles are inorganic oxide particles.
13. The method of claim 12 , wherein the inorganic oxide particles contain silica, alumina, or both.
14. The method of claim 13 , wherein the inorganic oxide particles are modified with a transition metal.
15. The method of claim 11 , wherein the odor control particles contain a quinone compound.
16. The method of claim 11 , wherein the odor control particles constitute from about 0.01 to about 20 wt. % of the coating formulation.
17. The method of claim 11 , wherein a solvent constitutes from about 40 to about 99 wt. % of the coating formulation.
18. The method of claim 1 , wherein the odor control particles are homogeneously distributed within the web.
19. The method of claim 11 , wherein the odor control particles are present in an amount of from about 0.1 to about 10 wt. % of the web.
20. The method of claim 11 , wherein the fibrous sheet is a fluff pulp sheet.