Absorbent core exhibiting controlled deformation in use and absorbent article comprising said core

• US 9,597,236 B2
• Filed: 12/27/2012
• Issued: 03/21/2017
• Est. Priority Date: 12/27/2012
• Status: Active Grant

• Current Assignee: Essity Hygiene and Health Aktiebolag
• Original Assignee: SCA Hygiene Products AB (Industrivärden AB)
• Inventors: Esping stlin, Hanna, Guidotti, Edward
• Primary Examiner(s): Anderson, Lynne
• Application Number:
  US14/646,196
• Publication Number:
  US 20150328063A1
• Time in Patent Office: 1,545 Days
• Field of Search: 604/385.101
• US Class Current: 1/1
• CPC Class Codes: A61F 13/4704 having preferential bending zones, e.g. fold lines or grooves
• CPC Class Codes: A61F 13/49001 having preferential bending zones, e.g. fold lines or grooves
• CPC Class Codes: A61F 13/533 having discontinuous areas of compression
• 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 13/536 having discontinuous areas of compression
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/15406 Basis weight
• CPC Class Codes: A61F 2013/530481 having superabsorbent materials, i.e. highly absorbent polymer gel materials
• CPC Class Codes: A61F 2013/530963 being maximum at the crotch
• CPC Class Codes: A61F 2013/530985 being along the side edges
• CPC Class Codes: A61F 2013/53445 from several sheets
• CPC Class Codes: A61F 2013/5355 with terraced core

Abstract

An absorption body intended to form part of an absorbent disposable article includes a first absorption layer intended to face towards the user upon use and a second absorption layer intended to face away from the user upon use. The first absorption layer has a longitudinal opening in the crotch area and the second absorption layer has a longitudinal compression arranged in the crotch area.

Claims

1. Absorption body configured to form part of an absorbent disposable article having a longitudinal centre line, a crotch area, a front end area and a rear end area, wherein the absorption body comprises:

a first absorption layer that is configured to face towards the user when in use and has longitudinal edges; and

a second absorption layer that is configured to face away from the user when in use and has longitudinal edges, wherein

the first absorption layer has a first longitudinal opening arranged in the crotch area,

the second absorption layer has a first longitudinal compression arranged in the crotch area,

the first longitudinal opening and the first longitudinal compression overlap one another, and

the first longitudinal compression has a thickness that is 10% to 30% of a thickness of the second absorption layer, and a length of the first longitudinal compression is equal to or less than 30% of a length of the first absorption layer in a longitudinal direction.

2. The absorption body according to claim 1, wherein the first longitudinal opening and the first longitudinal compression substantially coincide with the longitudinal centre line.

3. The absorption body according to claim 1, wherein

the first absorption layer has a second longitudinal opening arranged in the crotch area between the longitudinal centre line and one longitudinal edge of the first absorption layer,

the first longitudinal opening is arranged between the longitudinal centre line and the one opposing longitudinal edge of the first absorption layer,

the second absorption layer has a second longitudinal compression arranged in the crotch area between the longitudinal centre line and one longitudinal edge of the second absorption layer,

the first longitudinal compression is arranged between the longitudinal centre line and an opposing longitudinal edge of the second absorption layer, and

the second longitudinal opening and the second longitudinal compression substantially overlap one another.

4. The absorption body according to claim 3, wherein the first absorption layer has a third longitudinal compression arranged in the crotch area and substantially coinciding with the longitudinal centre line,

the second absorption layer has a third longitudinal opening arranged in the crotch area and substantially coinciding with the longitudinal centre line, and

the third longitudinal compression and the third longitudinal opening overlap one another.

5. The absorption body according to claim 1, wherein an acquisition material is arranged on a side of the first absorption layer that is configured to face towards the user.

6. The absorption body according to claim 5, wherein the acquisition material is divided into two separate parts, one part is arranged between the longitudinal centre line and one longitudinal edge of the first and second absorption layers and the other part is arranged between the longitudinal centre line and the other longitudinal edge of the first and second absorption layers, and each respective part is at a distance from the longitudinal centre line and from an adjacent longitudinal edge.

7. The absorption body according to claim 5, wherein the first and second absorption layers have a basis weight of between 50 g/m² and 1000 g/m².

8. The absorption body according to claim 1, wherein a basis weight of the first absorption layer and a basis weight of the second absorption layer are substantially the same.

9. The absorption body according to claim 1, wherein the first and second absorption layers have a content of absorbent polymer material of between 0% and 80%.

10. The absorption body according to claim 9, wherein the absorbent polymer material is superabsorbent polymer.

11. The absorption body according to claim 1, wherein one of the first and second absorption layers has a greater extension in a longitudinal direction than the other of the first and second absorption layers.

12. The absorption body according to claim 1, wherein the front end area and the rear end area of the absorption body have a greater extension in a transverse direction than the crotch area.

13. The absorption body according to claim 1, wherein the disposable article consists of a baby diaper.

14. The absorption body according to claim 13, wherein the absorbent disposable article comprises a liquid-permeable envelope layer, and the envelope layer has hydrophilic properties which are arranged at least in a longitudinal zone overlapping the longitudinal edges of the first and second absorption layers.

15. The absorption according to claim 1, wherein the disposable article consists of an incontinence pad for incontinent adult users.

16. The absorption body according to claim 15, wherein the absorbent disposable article comprises a liquid-permeable envelope layer, and the envelope layer has hydrophilic properties which are arranged at least in a longitudinal zone overlapping the longitudinal edges of the first and second absorption layers.

17. The absorption body according to claim 1, wherein an extension of the first absorption layer in a longitudinal direction is the same as the extension of the second absorption layer in the longitudinal direction.

18. The absorption body according to claim 1, wherein a length of the first longitudinal opening is only 30% of the length of the first absorption layer in a longitudinal direction.