Wearable disposable absorbent article

• US 10,449,098 B2
• Filed: 05/10/2016
• Issued: 10/22/2019
• Est. Priority Date: 05/10/2016
• Status: Active Grant

• Current Assignee: Essity Hygiene and Health Aktiebolag (Essity AB)
• Original Assignee: Essity Hygiene and Health Aktiebolag (Essity AB)
• Inventors: Johansson, Marie, Een, Hans, Campillo, Joanna
• Primary Examiner(s): Anderson, Catharine L
• Application Number:
  US16/099,319
• Publication Number:
  US 20190133845A1
• Time in Patent Office: 1,260 Days
• CPC Class Codes: A61F 13/49061 the diaper having one or two waist members forming the diaper waist region and an independent absorbent structure attached to the one or two waist members forming the crotch region
• CPC Class Codes: A61F 13/51478 being a laminate, e.g. multi-layered or with several layers
• CPC Class Codes: A61F 13/51484 being inhomogeneous in the plane of the sheet, i.e. having zones of different properties or structures
• CPC Class Codes: A61F 13/51496 having visual effects
• CPC Class Codes: A61F 2013/15869 with ultrasonic energy
• CPC Class Codes: A61F 2013/15878 by thermal bonding
• CPC Class Codes: A61F 2013/51026 being in thermoplastic material
• CPC Class Codes: A61F 2013/51452 being nonwovens

Abstract

A wearable disposable absorbent article includes a front panel, a back panel, and a crotch panel bridging and at least partially overlapping the front and back panels. A backsheet of the crotch panel has a laminate structure including a liquid barrier sheet and a nonwoven layer arranged on top of each other. The liquid barrier sheet extends over the entire length of the crotch panel and further over at least a portion of each of the front and back panels. The nonwoven layer extends at least over the entire length of the crotch panel but not over a length of more than 40 mm over each of the front and back panels. The width of the nonwoven layer is smaller than the width of the liquid barrier sheet.

Claims

1. A wearable disposable absorbent article comprising:

a front panel;

a back panel; and

a crotch panel bridging and at least partially overlapping the front panel and the back panel;

wherein

the crotch panel comprises;

a topsheet;

a backsheet having a laminate structure comprising a liquid barrier sheet and a nonwoven layer arranged on top of each other; and

an absorbent core provided between the topsheet and the backsheet,

wherein the nonwoven layer is arranged at an outer side of the crotch panel, facing away from a wearer of the absorbent article when worn,

wherein the liquid barrier sheet extends over the entire length, in the direction from the front panel towards the back panel, of the portion of the crotch panel arranged between the front panel and the back panel, and the liquid barrier sheet further extends over at least a portion of the front panel and over at least a portion of the back panel,

wherein the nonwoven layer extends at least over the entire length, in the direction from the front panel towards the back panel, of the portion of the crotch panel arranged between the front panel and the back panel,

wherein the nonwoven layer does not extend over the front panel over a length, in the direction from the front panel towards the back panel, of more than 40 mm,

wherein the nonwoven layer does not extend over the back panel over a length, in the direction from the front panel towards the back panel, of more than 40 mm, and

wherein the width, in the direction perpendicular to the direction from the front panel towards the back panel, of the nonwoven layer is smaller than the width, in the direction perpendicular to the direction from the front panel towards the back panel, of the liquid barrier sheet, wherein the relative dimensions given for the absorbent article relate to the fully unfolded and laid out flat state of the absorbent article.

2. The wearable disposable absorbent article according to claim 1, wherein the liquid barrier sheet is made of a plastic material and/or a nonwoven material.

3. The wearable disposable absorbent article according to claim 1, wherein the liquid barrier sheet extends over the entire length, in the direction from the front panel towards the back panel, of the crotch panel.

4. The wearable disposable absorbent article according to claim 1, wherein the nonwoven layer extends over the front panel over a length, in the direction from the front panel towards the back panel, in the range of 5 mm to 40 mm and/or the nonwoven layer extends over the back panel over a length, in the direction from the front panel towards the back panel, in the range of 5 mm to 40 mm.

5. The wearable disposable absorbent article according to claim 1, wherein the length, in the direction from the front panel towards the back panel, of the nonwoven layer is in the range of 40% to 70% of the length, in the direction from the front panel towards the back panel, of the liquid barrier sheet.

6. The wearable disposable absorbent article according to claim 1, wherein the width, in the direction perpendicular to the direction from the front panel towards the back panel, of the nonwoven layer is smaller than the width, in the direction perpendicular to the direction from the front panel towards the back panel, of the liquid barrier sheet by not more than 50 mm.

7. The wearable disposable absorbent article according to claim 1, wherein the crotch panel further comprises a nonwoven cuff material having inner edges at the outer side of the crotch extending along the direction from the front panel towards the back panel,

wherein the inner edges of the nonwoven cuff material are spaced apart from each other by a distance in the direction perpendicular to the direction from the front panel towards the back panel, and

wherein the width, in the direction perpendicular to the direction from the front panel towards the back panel, of the nonwoven layer is larger than the distance between the inner edges of the nonwoven cuff material, so that the nonwoven layer extends beyond each of the inner edges of the nonwoven cuff material in the direction perpendicular to the direction from the front panel towards the back panel.

8. The wearable disposable absorbent article according to claim 7, wherein the nonwoven layer extends beyond each of the inner edges of the nonwoven cuff material in the direction perpendicular to the direction from the front panel towards the back panel by 30 mm or less.

9. The wearable disposable absorbent article according to claim 1, wherein at least one of the front panel, the back panel, the crotch panel, the nonwoven layer, and the liquid barrier sheet has a substantially rectangular shape in plain view.

10. The wearable disposable absorbent article according to claim 1, wherein the absorbent article has an H-shape in plain view.

11. The wearable disposable absorbent article according to claim 1, wherein the liquid barrier sheet has one or more printed areas at the portion thereof which overlaps with the front panel and/or the portion thereof which overlaps with the back panel, and

the nonwoven layer does not extend into the one or more printed areas.

12. The wearable disposable absorbent article according to claim 1, wherein the liquid barrier sheet and the nonwoven layer are attached to each other by thermosealing, by ultrasonic welding, or by an adhesive.

13. The wearable disposable absorbent article according to claim 1, wherein the liquid barrier sheet is a breathable layer or a non-breathable layer.

14. The wearable disposable absorbent article according to claim 1, wherein the liquid barrier sheet has a basis weight in the range of 8 g/m² to 22 g/m².

15. The wearable disposable absorbent article according to claim 1, wherein the absorbent article is a diaper, an incontinence garment, or a feminine garment.

16. The wearable disposable absorbent article according to claim 1, wherein the nonwoven layer consists of a single piece of nonwoven material.