STRETCHABLE ABSORBENT ARTICLE

• US 20110112498A1
• Filed: 12/06/2010
• Published: 05/12/2011
• Est. Priority Date: 10/31/2003
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Mleziva, Mark M., Zhou, Peiguang, Sawyer, Lawrence H., Nhan, Davis Dang Hoang
• Granted Patent: US 8,450,555 B2
• Time in Patent Office: Days
• US Class Current: 604/366
• CPC Class Codes: A61F 13/15658 Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
• CPC Class Codes: A61F 13/15699 Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes A61F13/5323, A61F13/537 take precedence
• CPC Class Codes: A61F 2013/1591 via adhesive
• CPC Class Codes: A61F 2013/53062 being made into a paper or non-woven
• CPC Class Codes: A61L 15/225 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: A61L 15/58 Adhesives
• CPC Class Codes: A61L 15/585 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 15/60 Liquid-swellable gel-forming materials, e.g. super-absorbents
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 156/1089 of discrete laminae to single face of additional lamina

Abstract

An absorbent article having a stretchable substrate and an absorbent composite comprising a layer of adhesive composition in contact with the stretchable substrate. A layer of particulate superabsorbent material is applied to and held by the adhesive composition. The absorbent composite is secured to the substrate by the adhesive composition. The stretchable substrate has a recovery in at least one of the lateral direction and the longitudinal directions of the article as determined by an Elongation and Recovery Test, and the absorbent article has a recovery in the at least one of the lateral direction and the longitudinal direction as determined by the Elongation and Recovery Test that is at least about 60 percent of the recovery of the substrate in the at least one of the lateral direction and the longitudinal direction.

Claims

1. An absorbent composite for an absorbent article, the absorbent composite comprising:

an adhesive composition and particulate superabsorbent material held by the adhesive composition, said adhesive composition having a viscosity of less than about 10,000 centipoises at a temperature of less than or equal to about 400 degrees Fahrenheit (about 204 degrees Celsius) and a storage modulus (G′

) of less than or equal to about 1.0×

10⁷ dyne/cm² at 25 degrees Celsius.

2. An absorbent composite as set forth in claim 1 in combination with a stretchable substrate, the absorbent composite being secured to the substrate by the adhesive composition.

3. A combination as set forth in claim 2 further comprising a second substrate in generally superposed relationship with the stretchable substrate whereby the absorbent composite is disposed between said stretchable substrate and said second substrate.

4. A combination as set forth in claim 2 wherein the absorbent composite is formed on the stretchable substrate.

5. An absorbent composite as set forth in claim 1 wherein the absorbent composite comprises a layer of adhesive composition and a layer of particulate superabsorbent material applied to and held by the adhesive composition.

6. An absorbent composite as set forth in claim 5 in combination with a stretchable substrate, the layer of adhesive composition being applied to the stretchable substrate to secure the absorbent composite thereto and the layer of particulate superabsorbent material being applied to and held by the adhesive composition.

7. A combination as set forth in claim 3 wherein the second substrate is secured to the absorbent composite by the adhesive composition.

8. A combination as set forth in claim 7 wherein the absorbent composite comprises a first layer of adhesive composition, a first layer of particulate superabsorbent material applied to and held by the first layer of adhesive composition, and a second layer of adhesive composition applied to the first layer of particulate superabsorbent material, the stretchable substrate being secured to the absorbent composite by the first layer of adhesive composition and the second substrate being secured to the absorbent composite by the second layer of adhesive composition.

9. An absorbent composite as set forth in claim 1 wherein the adhesive composition comprises a hot-melt adhesive.

10. An absorbent composite as set forth in claim 1 wherein the adhesive composition has a viscosity of less than about 10,000 centipoises at a temperature of less than or equal to about 300 degrees Fahrenheit (about 149 degrees Celsius).

11. An absorbent composite as set forth in claim 10 wherein the adhesive composition has a viscosity of less than about 10,000 centipoises at a temperature of less than or equal to about 250 degrees Fahrenheit (about 121 degrees Celsius).

12. An absorbent composite as set forth in claim 1 wherein the adhesive composition has a viscosity in the range of about 1,000 to about 8,000 centipoises at a temperature of about 300 degrees Fahrenheit (about 149 degrees Celsius).

13. An absorbent composite as set forth in claim 12 wherein the adhesive composition has a viscosity in the range of about 2,000 to about 6,000 centipoises at a temperature of about 300 degrees Fahrenheit (about 149 degrees Celsius).

14. An absorbent composite as set forth in claim 1 wherein the adhesive composition has a storage modulus (G′

) in the range of about 1.0×

10⁵ to about 1.0×

10⁶ dyne/cm² at 25 degrees Celsius.

15. An absorbent composite as set forth in claim 1 wherein the adhesive composition has a glass transition temperature (Tg) in the range of about −

25 degrees Celsius to about 25 degrees Celsius.

16. An absorbent composite as set forth in claim 15 wherein the adhesive composition has a glass transition temperature (Tg) in the range of about −

10 degrees Celsius to about 25 degrees Celsius.

17. An absorbent composite as set forth in claim 1 further comprising hydrophilic fibers.

18. An absorbent composite as set forth in claim 1 wherein the absorbent composite has a width and a length, said absorbent composite having a non-uniform basis weight across at least a portion of at least one of the width and the length of said absorbent composite.

19. A combination as set forth in claim 2 wherein the substrate defines an outer cover of an absorbent article, the absorbent article further comprising a liquid permeable liner in generally superposed relationship with the outer cover and adapted for contiguous relationship with the wearer'"'"'s skin, the absorbent composite being disposed between the liner and the outer cover.

20. An absorbent composite as set forth in claim 5 wherein the layer of adhesive composition is a first layer of adhesive composition and the layer of particulate superabsorbent material is a first layer of particulate superabsorbent material, the absorbent composite further comprising a second layer of adhesive composition applied to the first layer of particulate superabsorbent material, and a second layer of particulate superabsorbent material applied to and held by the second layer of adhesive composition.

21. An absorbent composite as set forth in claim 1 wherein the absorbent composite comprises a mixture of adhesive composition and superabsorbent material.

22. An absorbent composite as set forth in claim 1 wherein the adhesive composition is hydrophilic.

23. An absorbent composite as set forth in claim 1 wherein the adhesive composition is hydrophobic.

24-84. -84. (canceled)