Absorbent articles providing improved fit when wet

• US 6,083,210 A
• Filed: 03/27/1997
• Issued: 07/04/2000
• Est. Priority Date: 03/27/1997
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Haynes, Nancy Ann, Schmidt, Mattias, Young, Gerald Alfred, Ehrnsperger, Bruno Johannes, LaVon, Gary Dean
• Primary Examiner(s): Polutta, Mark O.
• Application Number:
  US08/825,072
• Time in Patent Office: 1,195 Days
• Field of Search: 604/367, 604/368, 604/378, 604/385.2, 604/373
• 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 2013/15463 Absorbency
• CPC Class Codes: A61F 2013/1552 with specific diffusion velocity
• CPC Class Codes: A61F 2013/530036 being made in chemically-modified cellulosic material, e.g. Rayon
• CPC Class Codes: A61F 2013/530817 being open cells

Abstract

Disclosed are absorbent cores for inclusion in absorbent articles such as diapers, incontinent briefs, training pants, diaper holders and liners, feminine hygiene garments, and the like, designed to provide improved fit and comfort for the wearer while adequately containing body exudates. The absorbent cores are designed to be relatively narrow in the crotch region of the article, even when the core absorbs significant amounts of fluid during use. To achieve this, the absorbent core is designed such that fluid is moved substantially from the crotch region to the front and/or rear regions of the article.

The invention particularly relates to an absorbent article comprising an absorbent core wherein the absorbent core has a crotch width when dry and when wet of not more than about 7 cm, and wherein the crotch region of the absorbent core has a capacity of not more than about 40% of the absorbent core'"'"'s total absorbent capacity.

Claims

1. An absorbent article comprising an absorbent core having a crotch width when dry and when wet of not more than about 7 cm, said crotch width being narrower than at least one other portion of the absorbent core, wherein the absorbent core is capable of accepting, in accordance with the article total absorbent capacity and crotch region percent capacity test set forth in the specification, at least two loadings of synthetic urine applied to the crotch region at 10 minute intervals and at a volume and rate of delivery of 75 ml at 15 ml/sec before leakage of more than about 1 gram of synthetic urine from the article occurs and wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 40% of the absorbent core'"'"'s total capacity.

2. The absorbent article of claim 1 wherein the absorbent core has a crotch width when dry and when wet of not more than about 6 cm.

3. The absorbent article of claim 2 wherein the absorbent core has a crotch width when dry and when wet of not more than about 5 cm.

4. The absorbent article of claim 2 wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 25% of the absorbent core'"'"'s total absorbent capacity.

5. The absorbent article of claim 4 wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 15% of the absorbent core'"'"'s total absorbent capacity.

6. The absorbent article of claim 5 wherein the crotch region of the absorbent core has an absorbent capacity of from 0% to about 10% of the absorbent core'"'"'s total absorbent capacity.

7. The absorbent article of claim 1 wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 25% of the absorbent core'"'"'s total absorbent capacity.

8. The absorbent article of claim 7 wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 15% of the absorbent core'"'"'s total absorbent capacity.

9. The absorbent article of claim 8 wherein the crotch region of the absorbent core has an absorbent capacity of from 0% to about 10% of the absorbent core'"'"'s total absorbent capacity.

10. The absorbent article of claim 8 wherein at least about 67% of the absorbent core'"'"'s total absorbent capacity is behind the crotch point of the absorbent core.

11. The absorbent article of claim 1 wherein the crotch region comprises a distribution material that wicks synthetic urine vertically to a height of 5 cm in no more than about 30 minutes.

12. The absorbent article of claim 11 wherein the distribution material wicks synthetic urine vertically to a height of 5 cm in no more than about 15 minutes.

13. The absorbent article of claim 12 wherein the distribution material wicks synthetic urine vertically to a height of 5 cm in no more than about 5 minutes.

14. The absorbent article of claim 11 wherein the distribution material wicks synthetic urine vertically to a height of 12 cm in no more than about 2 minutes.

15. The absorbent article of claim 11 wherein the distribution material has a vertical wicking absorbent capacity of at least about 15 g/g at a height of 2 cm.

16. The absorbent article of claim 15 wherein the distribution material has a vertical wicking absorbent capacity of at least about 25 g/g at a height of 2 cm.

17. The absorbent article of claim 16 wherein the distribution material has a vertical wicking absorbent capacity of at least about 40 g/g at a height of 2 cm.

18. The absorbent article of claim 11 wherein the distribution material has a vertical wicking absorbent capacity of at least about 10 g/g at a height of 20 cm.

19. The absorbent article of claim 18 wherein the distribution material has a vertical wicking absorbent capacity of at least about 20 g/g at a height of 20 cm.

20. The absorbent article of claim 19 wherein the distribution material has a vertical wicking absorbent capacity of at least about 30 g/g at a height of 20 cm.

21. The absorbent article of claim 11 wherein the distribution material has a vertical wicking absorbent capacity of at least about 5 g/g at a height of 25 cm.

22. The absorbent article of claim 21 wherein the distribution material has a vertical wicking absorbent capacity of at least about 20 g/g at a height of 25 cm.

23. The absorbent article of claim 22 wherein the distribution material has a vertical wicking absorbent capacity of at least about 30 g/g at a height of 25 cm.

24. The absorbent article of claim 11 wherein the distribution material has a vertical wicking absorbent capacity of at least about 0.5 g/g at a height of 30 cm.

25. The absorbent article of claim 24 wherein the distribution material has a vertical wicking absorbent capacity of at least about 10 g/g at a height of 30 cm.

26. The absorbent article of claim 25 wherein the distribution material has a vertical wicking absorbent capacity of at least about 20 g/g at a height of 30 cm.

27. An absorbent article comprising an absorbent core having a crotch width when dry and when wet of not more than about 7 cm, said crotch width being narrower than at least one other portion of the absorbent core, wherein the absorbent core is capable of accepting, in accordance with the article total absorbent capacity and crotch region percent capacity test set forth in the specification, at least two loadings of synthetic urine applied to the crotch region at 10 minute intervals and at a volume and rate of delivery of 75 ml at 15 ml/sec before leakage of more than about 1 gram of synthetic urine from the article occurs and wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 40% of the absorbent core'"'"'s total capacity, and wherein the absorbent core comprises a material selected from the group consisting of an open-celled absorbent polymeric foam material;

and a fibrous material that comprises (i) chemically stiffened, twisted, and curled bulking fibers, (ii) high surface area fibers, and (iii) a chemical binder additive.

28. The absorbent core of claim 27, wherein the absorbent article comprises an open-celled absorbent polymeric foam material, wherein the polymeric foam is derived from a high internal phase water-in-oil emulsion.

29. The absorbent article of claim 28, wherein the open-celled absorbent polymeric foam has a specific surface area per foam volume values of at least about 0.025 m² /cc.

30. The absorbent article of claim 29, wherein the open-celled absorbent polymeric foam has a resistance to compression deflection of about 40% or less when measured under a confining pressure of 0.74 psi.

31. The absorbent article of claim 27 wherein the absorbent core comprises fibrous material that comprises (i) from about 80% to about 90% of chemically stiffened, twisted, and curled fibers, (ii) from about 8% to about 18% of a high surface area fiber, and (iii) from about 0.25% to about 2% of a chemical additive binding means.

32. The absorbent article of claim 31, wherein the fibrous material is permanently deformed via mechanical treatment.

33. An absorbent article comprising an absorbent core having a crotch width when dry and when wet of not more than about 6 cm, said crotch width being narrower than at least one other portion of the absorbent core, wherein the absorbent core is capable of accepting, in accordance with the article total absorbent capacity and crotch region percent capacity test set forth in the specification, at least two loadings of synthetic urine applied to the crotch region at 10 minute intervals and at a volume and rate of delivery of 75 ml at 15 ml/sec before leakage of more than about 1 gram of synthetic urine from the article occurs and wherein the crotch region of the absorbent core has an absorbent capacity of not more than about 25% of the absorbent core'"'"'s total capacity.

34. The absorbent article of claim 33 wherein the absorbent core comprises a distribution material that wicks synthetic urine vertically to a height of 5 cm in no more than about 30 minutes.

35. The absorbent article of claim 34 wherein the distribution material wicks synthetic urine vertically to a height of 12 cm in no more than about 2 minutes.

36. The absorbent article of claim 34 wherein the distribution material has a vertical vicking absorbent capacity of at least about 15 g/g at a height of 2 cm.