Multiple folded side barrier for improved leakage protection

• US 5,752,947 A
• Filed: 01/13/1997
• Issued: 05/19/1998
• Est. Priority Date: 04/03/1995
• Status: Expired due to Fees

• Current Assignee: McNeil-PPC Incorporated (Johnson & Johnson)
• Original Assignee: McNeil-PPC Incorporated (Johnson & Johnson)
• Inventors: Awolin, Bernhard
• Primary Examiner(s): Clarke, Robert A.
• Application Number:
  US08/782,857
• Time in Patent Office: 491 Days
• Field of Search: 604/358, 604/369-370, 604/378, 604/385.1, 604/385.2, 604/387
• US Class Current: 604/387
• CPC Class Codes: A61F 13/4753 the barrier being not integral with the topsheet or backsheet
• CPC Class Codes: A61F 13/4942 the barrier not being integral with the top- or back-sheet

Abstract

An absorbent product having fluid repellent leakage barriers is provided to reduce or prevent side leakage. The leakage barriers comprise folded structures which are attached longitudinally on the body-facing side of the absorbent product adjacent each lateral edge of the absorbent product and the distal ends of each leakage barrier are anchored to the absorbent product. When the absorbent product is flexed concavely along its longitudinal axis with respect to the body-facing side the leakage barriers at least partially open to form upstanding walls.

Claims

1. An absorbent product having a central absorbent core, a fluid impervious garment facing side and a fluid pervious body facing side, a first lateral edge, a second lateral edge, a first longitudinal end and a second longitudinal end, the absorbent product comprising:

a first folded structure having a longitudinal shape and a plurality of layers including at least a lower layer and an upper layer, the lower layer being attached longitudinally to the fluid pervious body facing side adjacent the first lateral edge to provide a first leakage barrier; and

a second folded structure having a longitudinal shape and a plurality of layers including at least a lower layer and an upper layer, the lower layer being attached longitudinally to the fluid pervious body facing side adjacent the second lateral edge to provide a second leakage barrier; and

wherein the first and second leakage barriers have a plurality of folds forming a pleated cuff, the folds being operable to at least partially open to form upstanding walls when the body-facing side is flexed concavely; and

wherein each of the first and second leakage barriers has a first distal end and second distal end and wherein the first and second distal ends of each of the leakage barriers are secured to the body-facing side and wherein the plurality of layers are adhered to each other at their respective first and second distal ends to entirely anchor the distal ends of each respective leakage barrier to the absorbent article.

2. The absorbent product of claim 1, wherein each of the leakage barriers has a length substantially equal to the length of the absorbent product.

3. The absorbent product of claim 1, wherein each of the leakage barriers has a length equal to at least one third the length of the absorbent product.

4. The absorbent product of claim 1, wherein each of the first and second leakage barriers comprise a material folded multiple times to form pleated cuffs.

5. The absorbent product of claim 4, wherein the pleated cuffs have top-most layers and bottom-most layers, the bottom-most layers being attached to the fluid pervious body-facing side of the absorbent product.

6. The absorbent product of claim 5, wherein the pleated cuffs are longitudinally shaped and have first and second distal ends, the top-most layer and the bottom-most layer being secured together at the first distal ends and at the second distal ends and attached to the fluid pervious body-facing side of the absorbent product.

7. The absorbent product of claim 6, wherein the first and second ends of the top-most layer and the bottom-most layer are attached longitudinally adjacent to the lateral edge of the body facing side, respectively, proximate the longitudinal ends of the absorbent product.

8. The absorbent product of claim 6, wherein the first and second distal ends of the top-most layer and the bottom-most layer are attached longitudinally adjacent to the lateral edge of the body facing side, respectively, proximate both sides of the central portion of the absorbent product.

9. The absorbent product of claim 6, wherein the first and second distal ends of the top-most layer and the bottom-most layer are attached longitudinally adjacent to the lateral edge of the body facing side, respectively, wherein the first distal end is proximate to one longitudinal end of the absorbent product and the second distal end is proximate to the central portion of the absorbent product.

10. The absorbent product of claim 1, wherein a first tab extends from the first lateral edge of the absorbent product and a second tab extends from the second lateral edge of the absorbent product and wherein the first leakage barrier is attached partly along the first lateral edge and partly on the first tab and the second folded structure is attached partly along the second lateral edge and partly on the second tab.

11. The absorbent product of claim 1, wherein the first and second leakage barriers are formed from a hydrophobic material.

12. The absorbent product of claim 11, wherein the hydrophobic material is selected from the group consisting of nonwovens, plastic films, and foams.

13. The absorbent product of claim 1, wherein the first and second leakage barriers are formed from a hydrophilic material.

14. The absorbent product of claim 13, wherein the hydrophilic material is selected from the group consisting of nonwovens, apertured plastic films and foams.

15. The absorbent product of claim 1, wherein the first and second leakage barriers are formed from a laminated multiple ply sheet having at least one layer of a hydrophobic and at least one layer of a hydrophilic material.

16. The absorbent product of claim 15, wherein the hydrophobic material is selected from the group consisting of nonwovens, plastic films, and foams, and the hydrophilic material is selected from the group consisting of nonwovens, apertured films and foams.

17. The absorbent product of claim 1, wherein the first and second leakage barriers are formed from a hydrophobic, air permeable material.

18. The absorbent product of claim 17, wherein the hydrophobic, air permeable material is selected from the group consisting of nonwovens, apertured plastic films, and foams.

19. The absorbent product of claim 1, wherein the first and second leakage barriers and the fluid impervious garment facing side are formed from the same material.

20. The absorbent product of claim 1, wherein the first and second leakage barriers and the fluid pervious body facing side are formed from the same material.

21. The absorbent product of claim 1, wherein the first and second leakage barriers are formed from materials selected from the group consisting of materials used to make the body facing side and materials used to make the garment facing side, materials used to make side tabs, and combinations thereof.

22. A sanitary napkin comprising a fluid pervious topsheet, a fluid impervious bottom sheet, an absorbent core interposed between the topsheet and the bottom sheet, and first and second lateral edges, and having:

a first longitudinally shaped folded structure having a plurality of layers including at least a lower layer and an upper layer, the lower layer being attached longitudinally to the fluid pervious topsheet adjacent the first lateral edge to provide a first leakage barrier;

a second longitudinally shaped folded structure having a plurality of layers including at least a lower layer and an upper layer, the lower layer being attached longitudinally to the fluid pervious topsheet adjacent the second lateral edge to provide a second leakage barrier; and

wherein the first and second leakage barriers have a plurality of folds forming a pleated cuff, the folds being operable to at least partially open to form upstanding walls when the body-facing side is flexed concavely; and

wherein each of the first and second leakage barriers has a first distal end and second distal end and wherein the first and second distal ends of each of the leakage barriers are secured to the fluid pervious top sheet and wherein the plurality of layers are adhered to each other at their respective first and second distal ends to entirely anchor the distal ends of each respective leakage barrier to the absorbent article.

23. The sanitary napkin of claim 22, wherein the first and second leakage barriers are longitudinally shaped and have first and second distal ends, the layers of each of the first and second leakage barriers being anchored together at their respective distal ends.

24. The sanitary napkin of claim 22, wherein the first and second leakage barriers comprise a hydrophobic sheet having a plurality of folds forming multiple layered pleated cuffs, the folds being operable to at least partially open to form upstanding walls.

25. The sanitary napkin of claim 24, wherein the upstanding walls substantially prevent side leakage when the sanitary napkin is at least partially bunched between the upstanding walls.

26. The sanitary napkin of claim 24, further comprising:

an absorbent pad disposed between the leakage barriers, the absorbent pad having at least one C-fold formed on opposite edges thereof.