Compressed Substrates Configured to Deliver Active Agents

• US 20090240220A1
• Filed: 03/20/2008
• Published: 09/24/2009
• Est. Priority Date: 03/20/2008
• Status: Abandoned Application

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Heo, Jin, Jain, Lindsey Marie, Kim, Jaeho, MacDonald, John Gavin, Long, Andrew Mark, McDaniel, Mary L.
• Application Number:
  US12/052,327
• Publication Number:
  US 20090240220A1
• Time in Patent Office: Days
• US Class Current: 604/361
• CPC Class Codes: A61F 13/42 with wetness indicator or alarm
• CPC Class Codes: A61F 13/8405 Additives, e.g. for odour, disinfectant or pH control

Abstract

A compressed substrate having an altered upper surface is generally disclosed. The compressed substrate is configured to expand in the z-direction upon contact with a liquid to form an expanded substrate without substantially expanding in either the x-direction or the y-direction. The altered upper surface of the expanded substrate has an expanded surface area that is at least about 110% of the initial surface area of the compressed substrate. The compressed substrate is constructed from a compression molded web and includes an active agent. The compressed substrate can be included within the construction of an absorbent article to transfer the active agent to a wearer. The upper surface of a compressed substrate can be altered after formation of the compressed substrate. Alternatively, the upper surface of the compressed substrate can be altered during the compression process.

Claims

1. An absorbent article configured to transfer an active agent to a wearer, the absorbent article comprising:

a liquid-permeable layer;

a liquid-impermeable layer;

an absorbent core positioned between the liquid-permeable layer and the liquid-impermeable layer; and

a compressed substrate positioned between the liquid-permeable layer and the liquid-impermeable layer, wherein the compressed substrate defines a x-direction, a y-direction, a z-direction, and an altered upper surface, the altered upper surface defining an initial surface area, wherein the compressed substrate comprises a compression molded web and an active agent, wherein the compressed substrate is configured to expand in the z-direction upon contact with a liquid to form an expanded substrate without substantially expanding in either the x-direction or the y-direction, and wherein the altered upper surface of the expanded substrate has an expanded surface area that is at least about 110% of the initial surface area of the compressed substrate.

2. An absorbent article as in claim 1, wherein the altered upper surface comprises a concave upper surface.

3. An absorbent article as in claim 1, wherein the altered upper surface comprises a plurality of apertures.

4. An absorbent article as in claim 1, wherein the altered upper surface comprises a convex upper surface.

5. An absorbent article as in claim 1, wherein the altered upper surface comprises a plurality of protuberances.

6. An absorbent article as in claim 1, wherein the altered upper surface comprises at least one linear cut.

7. An absorbent article as in claim 6, wherein the altered upper surface comprises three linear cuts extending across the length of the upper surface, wherein the three linear cuts divide the upper surface into six substantially equally sized regions.

8. An absorbent article as in claim 1, wherein the compressed substrate is configured to at least double in size in the z-direction upon contact with a liquid.

9. An absorbent article as in claim 1, wherein the compressed substrate is configured to at least triple in size in the z-direction upon contact with a liquid.

10. An absorbent article as in claim 1, wherein the compressed substrate is configured to expand from about 5 times to about 10 times of its size in the z-direction upon contact with a liquid.

11. An absorbent article as in claim 1, wherein the compressed substrate is configured to expand only up to about 110% of its original size in both the x-direction and the y-direction.

12. An absorbent article as in claim 1, wherein the compression molded web comprises a nonwoven web of pulp staple fibers.

13. An absorbent article as in claim 1, wherein the active agent comprises a physiological cooling agent.

14. An absorbent article as in claim 1, wherein the active agent comprises a fizzing agent.

15. An absorbent article as in claim 1, wherein the active agent comprises a beneficial agent configured to provide a benefit to the wearer.

16. An absorbent article as in claim 1, wherein the active agent comprises activated carbon.

17. An absorbent article as in claim 1, wherein the active agent comprises an olfactory agent.

18. A method of altering an upper surface of a compressed substrate, the method comprising:

providing a compressed substrate defining an upper surface having an initial surface area, wherein the compressed substrate comprises a compression molded web and an active agent, wherein the compressed substrate has an expansion ratio of greater than about 2;

1.1; and

altering the upper surface of the compressed substrate such that upon contact with a liquid, the altered upper surface of the expanded substrate has an expanded surface area that is at least about 110% of the initial surface area of the compressed substrate.

19. A method of making a compressed substrate having an altered upper surface, the method comprising:

positioning a web material into an elongated barrel;

subjecting the web material to a compression force in a direction of the elongation of the barrel, wherein the compression force is provided by moving a pressing rod through the elongated barrel, wherein the pressing rod has a contact surface configured to alter the upper surface of the formed compressed substrate.

20. A compressed substrate defining a x-direction, a y-direction, a z-direction, and an altered upper surface, the altered upper surface defining an initial surface area, the compressed substrate comprising a compression molded web and an active agent, wherein the compressed substrate is configured to expand in the z-direction upon contact with a liquid to form an expanded substrate without substantially expanding in either the x-direction or the y-direction, and wherein the altered upper surface of the expanded substrate has an expanded surface area that is at least about 110% of the initial surface area of the compressed substrate.