Sanitary napkin having an independently displaceable central core segment

• US 5,591,148 A
• Filed: 04/08/1994
• Issued: 01/07/1997
• Est. Priority Date: 04/08/1994
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Chow, Shirley L., McFall, Ronald R., Oetjen, David C., Cree, James W., Hammons, John L., Hines, Letha M., Lampson, Patricia L., Moore, Megan R.
• Primary Examiner(s): Jones, Mary Beth
• Assistant Examiner(s): ZUTTARELLI, ANTHONY
• Application Number:
  US08/225,191
• Time in Patent Office: 1,005 Days
• Field of Search: 604/378, 604/387, 604/385.1, 604/358
• US Class Current: 604/378
• CPC Class Codes: A61F 13/15634 Making fibrous pads between sheets or webs
• 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 13/47227 for interlabial use
• CPC Class Codes: A61F 13/47263 with activating means, e.g. elastic, heat or chemical activatable means
• 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 13/537 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer A61F13/538 takes precedence
• CPC Class Codes: A61F 13/53717 the layer having a promotional function on liquid propagation in the horizontal direction
• CPC Class Codes: A61F 2013/4568 three-dimensional; with split absorbent core
• CPC Class Codes: A61F 2013/530175 with capillary channel

Abstract

A sanitary napkin is disclosed having an absorbent core comprising a central core segment and two side core segments. The sanitary napkin also includes a lifting member for displacing the central core segment relative to the side core segments.

Claims

1. A disposable absorbent article having a longitudinal centerline, a lateral centerline, and first and second longitudinally extending sides joining first and second laterally extending ends, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to the topsheet; and

an absorbent core disposed intermediate the topsheet and the backsheet, the absorbent core having a longitudinal length and a lateral width, the absorbent core comprising;

a first longitudinally extending side core segment, the first side core segment disposed intermediate the longitudinal centerline of the disposable absorbent article and the first longitudinally extending side of the disposable absorbent article;

a second longitudinally extending side core segment, the second side core segment disposed intermediate the longitudinal centerline of the disposable absorbent article and the second longitudinally extending side of the disposable absorbent article; and

a central core segment extending along the longitudinal centerline of the disposable absorbent article, the central core segment separate from the first and second longitudinally extending side core segments and displaceable in the Z-direction relative to the first and second side core segments and the backsheet, and wherein the central core segment is displaceable in the Z-direction independently of the first and second side core segments from a first extended configuration to a second compressed configuration.

2. A disposable absorbent article having a longitudinal centerline, a lateral centerline, and first and second longitudinally extending sides joining first and second laterally extending ends, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to the topsheet;

an absorbent core disposed intermediate the topsheet and the backsheet, the absorbent core having a longitudinal length and a lateral width, the absorbent core comprising;

a central core segment extending along the longitudinal centerline of the disposable absorbent article;

a first longitudinally extending side core segment, the first side core segment disposed intermediate the longitudinal centerline of the disposable absorbent article and the first longitudinally extending side of the disposable absorbent article; and

a second longitudinally extending side core segment, the second side core segment disposed intermediate the longitudinal centerline of the disposable absorbent article and the second longitudinally extending side of the disposable absorbent article; and

a lifting member disposed intermediate the backsheet and the central core segment for providing independent Z-direction displacement of the central core segment relative to the first and second side core segments.

3. The disposable absorbent article of claim 2 wherein each of the first and second side core segments is separate from the central core segment.

4. The disposable absorbent article of claim 2 wherein the central core segment has a lateral width less than the lateral width of the absorbent core.

5. The disposable absorbent article of claim 2 wherein the lifting member is nonabsorbent.

6. The disposable absorbent article of claim 2 wherein the lifting member has a wet caliper reduction of less than about eight percent.

7. The disposable absorbent article of claim 2 wherein the lifting member has a wet caliper reduction which is no more than about 20 percent greater than the dry caliper reduction of the lifting member.

8. The disposable absorbent article of claim 2 wherein the lifting member comprises a longitudinally extending lifting member having a plurality of pleats along the length of the lifting member, the pleats having a Z-direction height for providing Z-direction displacement of a portion of the central core segment relative to the backsheet.

9. The disposable absorbent article of claim 8 wherein the pleats have a Z-direction height of at least 10 millimeters.

10. The disposable absorbent article of claim 8 wherein the lifting member comprises a pleated first element and a second element joined to the first element at spaced apart locations along the length of the first element, and wherein elastic contraction of the second element relative to the first element gathers the first element to form pleats in the first element.

11. The disposable absorbent article of claim 8 further comprising a third element, wherein the second and third elements comprise elastic elements, and wherein the first element is joined to the third element at spaced apart locations along the length of the first element, and wherein the pleats of the first element extend between the second and third elements.

12. The disposable absorbent article of claim 2 further comprising a wicking member for conveying fluid intermediate the central core segment and the first and second side core segments.

13. The disposable absorbent article of claim 12 wherein the wicking member has a central portion disposed intermediate the central core segment and the lifting member, a first side portion disposed intermediate the backsheet and the first side core segment, and a second side portion disposed intermediate the backsheet and the second side core segment.

14. The disposable absorbent article of claim 13 wherein the wicking member comprises a first web of cellulosic fibers having a basis weight between about 10 grams per square meter and about 65 grams per square meter.

15. The disposable absorbent article of claim 12 further comprising a support member disposed intermediate the lifting member and the backsheet.

16. The disposable absorbent article of claim 14 further comprising a support member, the support member comprising a second web of cellulosic fibers having a basis weight of between about 10 grams per square meter and about 65 grams per square meter, the second web having a central portion disposed intermediate the lifting member and the backsheet, a first side portion disposed intermediate the first side portion of the wicking member and the backsheet, and a second side portion disposed intermediate the second side portion of the wicking member and the backsheet.

17. The disposable absorbent article of claim 16 wherein each of the first and second webs of cellulosic fibers has a lateral width less than the lateral width of the absorbent core.

18. The disposable absorbent article of claim 2 further comprising an absorbent gelling material disposed intermediate the lifting member and the central core segment.

19. The disposable absorbent article of claim 2 further comprising an absorbent gelling material disposed intermediate the lifting member and the backsheet.

20. The disposable absorbent article of claim 2 wherein the central core segment comprises an acquisition zone having a density less than the density of the first and second side core segments.

21. The disposable absorbent article of claim 2 wherein the central core segment comprises longitudinally oriented capillary channel fibers.

22. The disposable absorbent article of claim 8 wherein the lifting member comprises a wicking member.

23. A disposable absorbent article having a longitudinal centerline, a lateral centerline, and first and second longitudinally extending sides joining first and second laterally extending ends, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to the topsheet;

an absorbent core disposed intermediate the topsheet and the backsheet, the absorbent core having a longitudinal length and a lateral width, the absorbent core comprising;

a central core segment extending along the longitudinal centerline of the disposable absorbent article, the central core segment having a lateral width less than the lateral width of the absorbent core;

a first longitudinally extending side core segment, the first side core segment separate from the central core segment and disposed intermediate the longitudinal centerline of the disposable absorbent article and the first longitudinally extending side of the disposable absorbent article; and

a second longitudinally extending side core segment, the second side core segment separate from the central core segment and disposed intermediate the longitudinal centerline of the disposable absorbent article and the second longitudinally extending side of the disposable absorbent article; and

a lifting member disposed intermediate the backsheet and the central core segment for providing Z-direction displacement of the central core segment;

wherein the first and second side core segments are spaced apart laterally, wherein at least a portion of the central core segment having a lateral width less than the lateral spacing between the first and second side core segments is disposed intermediate the first and second side core segments, and wherein the lifting member provides independent Z-direction displacement of the central core segment relative to the first and second side core segments.

24. A disposable absorbent article having a longitudinal centerline, a lateral centerline, and first and second longitudinally extending sides joining first and second laterally extending ends, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to the topsheet;

an absorbent core disposed intermediate the topsheet and the backsheet, the absorbent core having a longitudinal length and a lateral width, the absorbent core comprising;

a central core segment extending along the longitudinal centerline of the disposable absorbent article, the central core segment having a lateral width less than the lateral width of the absorbent core;

a first longitudinally extending side core segment, the first side core segment separate from the central core segment and disposed intermediate the longitudinal centerline of the disposable absorbent article and the first longitudinally extending side of the disposable absorbent article; and

a second longitudinally extending side core segment, the second side core segment separate from the central core segment and disposed intermediate the longitudinal centerline of the disposable absorbent article and the second longitudinally extending side of the disposable absorbent article;

a longitudinally extending lifting member disposed intermediate the backsheet and the central core segment for providing Z-direction displacement of the central core segment relative to the first and second side core segments; and

a web of cellulosic fibers having a basis weight of between about 10 grams per square meter and about 65 grams per square meter, the web of cellulosic fibers having a first longitudinally extending side portion, a second longitudinally extending side portion, and a longitudinally extending central portion extending laterally intermediate the first and second side portions;

wherein the central portion of the web is disposed intermediate the lifting member and the central core segment, wherein the first side portion of the web is disposed intermediate the backsheet and the first core side segment, and wherein the second side portion of the web is disposed intermediate the backsheet and the second core side segment.