Disposable absorbent hygiene product with topsheet and acquisition layer

Patent metadata

Field	Value
Publication number	US-11925536-B2
Application number	US-201817040819-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Mar 26, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A disposable absorbent hygiene product is provided, including a main part having a body facing surface intended to face the body of a user and a garment facing surface intended to face away from the body of a user. The main part includes a liquid permeable topsheet at the body facing surface, a liquid impermeable backsheet at the garment facing surface, and an absorbent assembly arranged between the topsheet and the backsheet. The liquid permeable topsheet material includes a hydrophilically treated polypropylene spunbond nonwoven or spunbond/meltblown composite nonwoven, having a basis weight of from 8 to 20 g/m 2 . An acquisition layer material is provided sandwiched between said topsheet and said absorbent assembly, being an through air bonded nonwoven.

First claim

What is claimed is:

1. A disposable absorbent hygiene product comprising:
a main part having a body facing surface intended to face a body of a user and a garment facing surface intended to face away from the body of the user,
the main part comprising a liquid permeable topsheet at the body facing surface, a liquid impermeable backsheet at the garment facing surface, and an absorbent assembly arranged between the topsheet and the backsheet, the main part having a front end and a back end, and defining a longitudinal direction from said front end towards said back end and defining a transversal direction perpendicular to the longitudinal direction,
wherein the absorbent assembly includes an imaginary longitudinal centerline and is divided by two, imaginary, transversally extending straight lines orthogonal to the imaginary longitudinal centerline into a front region towards said front end, having a longitudinal length of from 10% to 40% of a longitudinal length of the absorbent assembly; a back region towards said back end, having a longitudinal length of from 10% to 40% of the longitudinal length of the absorbent assembly; and a central region between said front region and said back region,
wherein in the front and back regions, the absorbent assembly comprises cellulosic fibers mixed with super absorbent polymers, with a super absorbent polymer concentration of from 0 to 30 weight %, based on a total weight of cellulosic fibers and super absorbent polymer, and a cellulosic fiber basis weight of from 50 to 200 g/m 2 ;
wherein said central region provides from 70% to 100% of a total retention capacity of the absorbent assembly,
wherein the liquid permeable topsheet comprises at least one of a hydrophilically treated polypropylene spunbond nonwoven and spunbond/meltblown composite nonwoven, having a basis weight of from 8 to 20 g/m 2 ; and
wherein an acquisition layer material is provided sandwiched between said topsheet and said absorbent assembly, being an through air bonded nonwoven having a basis weight of from 40 to 60 g/m 2 and a caliper of at least 0.9 mm according at 0.5 kPa pressure.

2. The product according to claim 1 , wherein said acquisition layer material comprises polyester fibers.

3. The product according to claim 2 ,
wherein said acquisition layer material comprises a blend of two or more types of fibers, wherein from 40 to 60 weight %, based on a total weight of the acquisition layer material, is polyester spiral crimp fiber, and wherein from 30 to 60 weight %, based on the total weight of the acquisition layer material, is polyester bicomponent fiber,
wherein said polyester spiral crimp fiber comprises hollow spiral crimp fiber,
wherein said acquisition layer material is wholly positioned within an area of said central region,
wherein said topsheet is hydrophilically treated by a surfactant coating,
wherein said topsheet has a strikethrough time of at most 7 seconds,
wherein said absorbent assembly comprises a first absorbent core having cellulosic fibers, mixed with super absorbent polymers, with a super absorbent polymer concentration of from 0 to 30 weight %, and having a cellulosic fiber basis weight of from 50 to 200 g/m 2 , said first absorbent core extending over a full longitudinal length of the absorbent assembly, and a second absorbent core positioned in said central region and in stacked relationship with said first absorbent core,
wherein said acquisition layer material is wholly positioned within an area of said second absorbent core,
wherein said second absorbent core is positioned between said first absorbent core and at least one of said backsheet and said topsheet,
wherein a super absorbent polymer concentration in said first absorbent core is at least 5 weight %,
wherein said second absorbent core comprises a mixture of cellulosic fibers and super absorbent polymer, with a super absorbent polymer concentration of from 20% to 70% and having a cellulosic fiber basis weight of from 250 to 500 g/m 2 ,
wherein said absorbent assembly has a longitudinal length of from 500 to 1000 mm and a transversal width of from 200 to 450 mm.

4. The product according to claim 1 , wherein said acquisition layer material comprises a blend of two or more types of fibers, wherein from 40 to 60 weight %, based on a total weight of the acquisition layer material, is polyester spiral crimp fiber, and wherein from 30 to 60 weight %, based on the total weight of the acquisition layer material, is polyester bicomponent fiber.

5. The product according to claim 4 , wherein said polyester spiral crimp fiber comprises hollow spiral crimp fiber.

6. The product according to claim 1 , wherein said acquisition layer material is wholly positioned within an area of said central region.

7. The product according to claim 1 , wherein said topsheet is hydrophilically treated by a surfactant coating.

8. The product according to claim 1 , wherein said topsheet has a strikethrough time of at most 7 seconds.

9. The product according to claim 1 , wherein said absorbent assembly has a longitudinal length of from 500 to 1000 mm and a transversal width of from 200 to 450 mm.

10. The product according to claim 1 , wherein said absorbent assembly comprises a first absorbent core having cellulosic fibers, mixed with super absorbent polymers, with a super absorbent polymer concentration of from 0 to 30 weight %, and having a cellulosic fiber basis weight of from 50 to 200 g/m 2 , said first absorbent core extending over a full longitudinal length of the absorbent assembly, and a second absorbent core positioned in said central region and in stacked relationship with said first absorbent core.

11. The product according to claim 10 , wherein said acquisition layer material is wholly positioned within an area of said second absorbent core.

12. The product according to claim 10 , wherein said second absorbent core is positioned between said first absorbent core and at least one of said backsheet and said topsheet.

13. The product according to claim 10 , wherein a super absorbent polymer concentration in said first absorbent core is at least 5 weight %.

14. The product according to claim 10 , wherein said second absorbent core comprises a mixture of cellulosic fibers and super absorbent polymer, with a super absorbent polymer concentration of from 20% to 70% and having a cellulosic fiber basis weight of from 250 to 500 g/m 2 .

Assignees

• Essity Hygiene & Health Ab

Inventors

• Hermenius Annika
• Andersson Patrik
• Guidotti Edward

Classifications

• A61F13/15203 Primary

  Properties of the article, e.g. stiffness or absorbency (chemical aspects A61L15/00) · CPC title

• A61F13/51113

  comprising an additive, e.g. lotion or odour control (A61F13/51108 takes precedence) · CPC title

• A61F13/515

  characterised by the interconnection of the topsheet and the backsheet · CPC title

• A61F13/535

  inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ({A61F13/5323,} A61F13/537 take precedence) · CPC title

• A61F2013/15373

  Calliper, i.e. thickness · CPC title