Absorbent article with a raised portion

• US 6,425,890 B1
• Filed: 09/01/1999
• Issued: 07/30/2002
• Est. Priority Date: 11/15/1996
• Status: Expired due to Fees

• Current Assignee: SCA Hygiene Products AB (Industrivärden AB)
• Original Assignee: SCA Hygiene Products AB (Industrivärden AB)
• Inventors: Johansson, Annelie, Drevik, Solgun, Widlund, Urban, Samuelsson, Ann, Björklund, Camilla
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): Bogart, Phil
• Application Number:
  US09/297,746
• Publication Number:
  US 20020026170A1
• Time in Patent Office: 1,063 Days
• Field of Search: 604/385.01, 604/347, 604/354, 604/386, 604/387, 604/378, 604/109, 604/49.4, 604/385.08, 604/385.21, 604/385.22, 604/385.23, 604/385.24, 604/385.17, 2 4/94, 210/9
• US Class Current: 604/385.17
• CPC Class Codes: A61F 13/4702 having a reinforcing member
• CPC Class Codes: A61F 13/47227 for interlabial use
• CPC Class Codes: A61F 13/4752 the means being an upstanding barrier

Abstract

The invention relates to an absorbent article intended for female users, such as a sanitary napkin, or an incontinence guard, having such a shape and size that it may be substantially accommodated in the crotch region of a pair of panties and having a longitudinal direction, a transverse direction and a thickness direction. The article exhibits a liquid-pervious cover layer and a liquid-impervious cover layer and further an absorbent core consisting of at least one absorbent body, arranged between the two surfaces, and wherein a hump is arranged at the liquid-pervious cover layer of the article. The invention is characterized in that the hump is substantially shape permanent in the transverse direction of the article, both in a wet and in a dry state, and to such an extent that the hump (16) is not deformed in the transverse direction, either temporarily or permanently, by the forces acting on the hump during use of the article.

Claims

1. An absorbent article intended for female users, with such a shape and size that it may be substantially accommodated in the crotch region of a pair of panties and having a longitudinal direction, a transverse direction and a thickness direction, comprising:

a liquid-pervious cover layer;

a liquid-impervious cover layer;

an absorbent core consisting of at least one absorbent body, arranged between the two cover layers; and

a single centrally arranged hump arranged at the liquid-pervious cover layer of the article, wherein the hump is substantially shape permanent in the transverse direction of the article, both in a wet and in a dry state, and to such an extent that the hump is not deformed in the transverse direction, either temporarily or permanently, by the forces which act upon the hump during use of the article, wherein the hump projects from a plane of the side of the article having the liquid-pervious cover layer, and wherein the hump has a base, facing the liquid-impervious cover layer, and a top, facing the liquid-pervious cover layer, whereby the extension of the hump in the transverse direction of the article is between 2 mm and 25 mm at the base, and the extension of the hump in the transverse direction at the top is between 3 mm and 10 mm, and the hump is wider at the base than at the top.

2. An article according to claim 1, wherein the hump is substantially shape permanent in the thickness direction of the article, whereby the article will not be permanently deformed by the pressure forces, acting in the thickness direction of the article, which arise during normal use of the article.

3. An article according to claim 1, further comprising a shape retaining element, wherein the hump is formed by the shape-retaining element.

4. An article according to claim 3, wherein the shape-retaining element comprises a layer of stiff plastic material.

5. An article according to claim 3, wherein at least a first absorbent body is arranged inside the shape-retaining element, seen in a direction from the liquid-pervious surface of the article, and that the shape-retaining element exhibits at least one through-going aperture, within the region of the hump, through which body fluid may pass into the first absorbent body.

6. An article according to claim 3, wherein an absorbent body is arranged between the shape-retaining element and the liquid-pervious cover layer of the article.

7. An article according to claim 1, wherein the hump is between 70 mm and 140 mm in the longitudinal directions of the article.

8. An article according to claim 1, wherein the hump is between 80 mm and 120 mm in the longitudinal direction of the article.

9. An article according to claim 1, wherein the hump has a base, facing the liquid-impervious cover layer, and a top, facing the liquid-pervious cover layer, whereby the extension of the hump in the transverse direction of the article is between 12 mm and 16 mm at the base, and the extension of the hump in the transverse direction at the top is between 4 mm and 6 mm, and the hump is wider at the base than at the top.

10. An article according to claim 1, wherein the liquid-pervious cover layer conforms to the hump and has substantially the same shape as the hump where the liquid-pervious cover layer covers the hump.

11. An absorbent article according to claim 1, wherein the absorbent article is a sanitary napkin or incontinence guard.

13. An article according to claim 3, wherein the edge barriers are formed by the arrangement of pre-tensioned elastic members mounted along the side edges.

12. An absorbent article intended for female users, with such a shape and size that it may be substantially accommodated in the crotch region of a pair of panties and having a longitudinal direction, a transverse direction and a thickness direction, comprising:

a liquid-pervious cover layer;

a liquid-impervious cover layer;

an absorbent core comprising at least one absorbent body, arranged between the two cover layers; and

a single centrally arranged hump arranged at the liquid-pervious cover layer of the article, wherein the hump is substantially shape permanent in the transverse direction of the article, both in a wet and in a dry state, and to such an extent that the hump is not deformed in the transverse direction, either temporarily or permanently, by the forces which act upon the hump during use of the article, wherein the hump projects from a plane of the side of the article having the liquid-pervious cover layer, and wherein the hump has a base, facing the liquid-impervious cover layer, and a top, facing the liquid-pervious cover layer, whereby the extension of the hump in the transverse direction of the article is between 2 mm and 25 mm at the base, and the extension of the hump in the transverse direction at the top is between 3 mm and 10 mm, and the hump is wider at the base than at the top,

and the absorbent article including two longitudinal side edges, wherein raised edge barriers are arranged along the longitudinal side edges.

14. An absorbent article according to claim 12, wherein the absorbent article is a sanitary napkin or incontinence guard.

15. An absorbent article, intended for female users, such as a sanitary napkin, or an incontinence guard, with such a shape and size that it may be substantially accommodated in the crotch region of a pair of panties and having a longitudinal direction, a transverse direction and a thickness direction, comprising:

a liquid-pervious cover layer;

a liquid-impervious cover layer;

an absorbent core comprising at least one absorbent body, arranged between the two cover layers; and

a single centrally arranged hump arranged at the liquid-pervious cover layer of the article, wherein the hump is substantially shape permanent in the transverse direction of the article, both in a wet and in a dry state, and to such an extent that the hump is not deformed in the transverse direction, either temporarily or permanently, by the forces which act upon the hump during use of the article, wherein the hump projects from a plane of the side of the article having the liquid-pervious cover layer, and wherein the hump has a base, facing the liquid-impervious cover layer, and a top, facing the liquid-pervious cover layer, whereby the extension of the hump in the transverse direction of the article is between 2 mm and 25 mm at the base, and the extension of the hump in the transverse direction at the top is between 3 mm and 10 mm, and the hump is wider at the base than at the top;

the absorbent article further comprising a shape-retaining element, wherein the hump is formed by the shape-retaining element; and

wherein edge barriers are formed by the shape-retaining element.

16. An absorbent article intended for female users with such a shape and size that it may be substantially accommodated in the crotch region of a pair of panties and having a longitudinal direction, a transverse direction and a thickness direction, the absorbent article comprising:

a liquid-pervious cover layer;

a liquid-impervious cover layer;

an absorbent core comprising at least one absorbent body arranged between the two cover layers; and

a centrally arranged hump extending from the absorbent core toward the liquid-pervious cover layer of the article,

wherein the hump is substantially shape permanent in the transverse direction of the article, both in a wet and in a dry state, and to such an extent that the hump is not deformed in the transverse direction, either temporarily or permanently, by the forces which act upon the hump during use of the article; and

wherein the liquid-pervious cover layer conforms to the hump and has substantially a same shape as the hump where the liquid-pervious cover layer covers the hump.

17. An absorbent article according to claim 16, wherein the hump comprises a body of absorbent material.

18. An absorbent article according to claim 17, wherein the hump further comprises a shape-retaining element arranged between the body of absorbent material and the liquid-permeable cover layer.

19. An absorbent article according to claim 16, wherein the liquid-permeable cover layer comprises a perforated shape-retaining element.

20. An absorbent article according to claim 16, wherein the hump comprises a body of absorbent material between the one absorbent body and the liquid-permeable cover layer.