Disposable absorbent article comprising a durable hydrophilic core wrap

• US 20040158212A1
• Filed: 01/15/2004
• Published: 08/12/2004
• Est. Priority Date: 02/10/2003
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Schmidt, Mattias, Cramer, Ronald Dean, Ponomarenko, Ekaterina Anatolyevna, Carter, John David
• Application Number:
  US10/758,066
• Publication Number:
  US 20040158212A1
• Time in Patent Office: Days
• US Class Current: 604/367
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/1565 by depositing continuous layers of fibrous material between webs, e.g. wrapping layers of fibrous material
• CPC Class Codes: A61F 13/49446 the edge leakage prevention means being an impermeable sheet or impermeable part of a sheet placed on or under the top sheet A61F13/49413 takes precedence
• CPC Class Codes: A61F 13/51 characterised by the outer layers wicking or transfer layers A61F13/537
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61F 13/53708 the layer having a promotional function on liquid propagation in at least one direction
• CPC Class Codes: A61F 13/53747 the layer is facing the topsheet layer is part of the topsheet A61F13/511
• CPC Class Codes: A61F 2013/5315 with a tissue-wrapped core
• CPC Class Codes: A61F 2013/53472 being a non-woven tissue wrapping the core

Abstract

A disposable absorbent article comprising an absorbent core, the absorbent core comprising:

(a) a storage layer; and

(b) a durable hydrophilic fluid pervious core wrap, the core wrap surrounding at least a portion of the storage layer, said core wrap comprising:

(i) a core wrap substrate; and

(ii) a hydrophilicity boosting composition coated on the substrate, the hydrophilicity boosting composition comprising a hydrophilicity boosting amount of nanoparticles, wherein the nanoparticles have a particle size of from about 1 to about 750 nanometers.

Methods of preparing disposable absorbent articles are also provided.

Claims

1. A disposable absorbent article comprising an absorbent core, said absorbent core comprising:

(a) a storage layer; and

(b) a durable, hydrophilic fluid pervious core wrap, said core wrap surrounding at least a portion of said storage layer said core wrap comprising;

(i) a core wrap substrate; and

(ii) a hydrophilicity boosting composition coated on said substrate, said hydrophilicity boosting composition comprising a hydrophilicity boosting amount of nanoparticles, wherein said nanoparticles have a particle size of from about 1 to about 750 nanometers.

2. A disposable absorbent article according to claim 1 wherein said substrate is selected from the group consisting of porous polymeric films, nonwoven materials and combinations thereof.

3. A disposable absorbent article according to claim 2 wherein said nonwoven material comprises fibers selected from the group consisting of polyolefins, polyesters, cellulose and combinations thereof.

4. A disposable absorbent article according to claim 3 wherein said nonwoven material comprises fibers selected from the group consisting of polypropylene, polyethylene, polyethylene terepthalate, rayon and combinations thereof.

5. A disposable absorbent article according to claim 1 wherein said nanoparticles are inorganic nanoparticles.

6. A disposable absorbent article according to claim 5 wherein said nanoparticles are selected from the group consisting of titanium dioxide, layered clay minerals, alumina oxide, silicates, and combinations thereof.

7. A disposable absorbent article according to claim 6 wherein said nanoparticles are selected from the group consisting of titanium dioxide, Boehmite alumina, sodium magnesium lithium fluorosilicates and combinations thereof.

8. A disposable absorbent article according to claim 1 wherein said hydrophilicity boosting composition further comprises a surfactant.

9. A disposable absorbent article according to claim 1 wherein said surfactant is a nonionic surfactant.

10. A disposable absorbent article according to claim 1 wherein said storage layer comprises material selected from the group consisting of absorbent gelling material, fluff, and mixtures thereof.

11. A disposable absorbent article according to claim 1 wherein said disposable absorbent article further comprises a substantially liquid pervious topsheet and a substantially liquid impervious backsheet, wherein said storage layer is between said topsheet and said backsheet, and at least a portion of said core wrap is between said storage layer and said top sheet.

12. A disposable absorbent article according to claim 1 wherein said core warp surrounds all of said storage layer.

13. A disposable absorbent article according to claim 12 wherein said disposable absorbent article is selected from the group consisting of diapers, adult incontinence products, training pant, feminine hygiene pads, and panty liners.

14. A disposable absorbent article according to claim 1 wherein said substrate has been treated with a high-energy surface treatment.

15. A disposable absorbent article according to claim 14 wherein said high-energy surface treatment is selected from the group consisting of corona discharge treatment, plasma treatment, UV radiation, ion beam treatment, electron beam treatment and combinations thereof.

16. A process for making a disposable absorbent article comprising an absorbent core, said absorbent core comprising a storage layer and a durable hydrophilic core wrap, said core wrap surrounding at least a portion of said storage layer and said process comprising the step of:

coating a core wrap substrate with a hydrophilicity boosting composition, said hydrophilicity boosting composition comprises a hydrophilicity boosting amount of nanoparticles, wherein said nanoparticles having a particle size of from about 1 to about 750 nanometers.

17. A process for making a disposable absorbent article according to claim 16 wherein prior to or concurrent with coating of said substrate, said substrate is treated with a high energy surface treatment said high-energy surface treatment is selected from the group consisting of corona discharge treatment, plasma treatment, UV radiation, ion beam treatment, electron beam treatment and combinations thereof.

18. A process for making a disposable absorbent article according to claim 17 wherein hydrophilicity boosting composition further comprises a carrier and a surfactant.

19. A process for making a disposable absorbent article according to claim 18 wherein said nanoparticles are inorganic nanoparticles.

20. A process for making a disposable absorbent article according to claim 16 wherein said substrate is selected from the group consisting of porous polymeric films, nonwoven materials and combinations thereof.