Breathable absorbent article

Patent metadata

Field	Value
Publication number	US-12558273-B2
Application number	US-202017027349-A
Country	US
Kind code	B2
Filing date	Sep 21, 2020
Priority date	Sep 20, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

An absorbent article including a non-woven substrate of one or more layers of meltblown fibers and a first layer of spunbond fibers and a second layer of spunbond fibers. The absorbent article further includes an absorbent core comprising at least one of fibers or a superabsorbent polymer. At least one of the non-woven substrate or the absorbent may be treated with an alcohol repellency (“AR”) treatment.

First claim

What is claimed is:

1 . An air-permeable absorbent underpad usable with a low-airloss-bed and configured to prevent liquid from passing from a first side of the absorbent underpad to a second side of the absorbent underpad, the underpad comprising:
a topsheet layer; an absorbent core comprising fibers or a superabsorbent polymer; and a non-woven substrate backsheet comprising:
a first layer of spunbond fibers;
a second layer of spunbond fibers;
a first layer of meltblown fibers;
a second layer of meltblown fibers;
a third layer of meltblown fibers; and
a fourth layer of meltblown fibers, wherein at least one of the layers of the non-woven substrate backsheet is treated with a fluorocarbon, and wherein the underpad is configured to cover at least a portion of the low-airloss-bed with the second side of the underpad facing a surface of the low-airloss-bed, and the substrate backsheet is configured to prevent liquid absorbed by the absorbent core of the underpad from passing to the second side of the underpad and to the surface of the low-airloss-bed, and wherein a hydrostatic pressure of the substrate backsheet is greater than or equal to 60 centimeters and less than or equal to 190 centimeters based on the American Association of Textile Chemists and Colorists (AATCC) Test Method 127-2008 and wherein an air permeability of the substrate backsheet is greater than or equal to 5 cubic feet per minute and less than or equal to 35 cubic feet per minute based on the American Society for Testing and Materials (ASTM D737-18) Standard Test Method for Air Permeability of Textile Fabrics.

2 . The air-permeable absorbent underpad of claim 1 , wherein the first layer of meltblown fibers, the second layer of meltblown fibers, the third layer of meltblown fibers, and the fourth layer of meltblown fibers are between the first layer of spunbond fibers and the second layer of spunbond fibers.

3 . The air-permeable absorbent underpad of claim 1 , wherein a hydrostatic pressure of the substrate backsheet ranges from 75-170 centimeters based on the American Association of Textile Chemists and Colorists (AATCC) Test Method 127-2008.

4 . The air-permeable absorbent underpad of claim 1 , wherein the hydrostatic pressure of the substrate backsheet ranges from 105 centimeters to 190 centimeters based on the American Association of Textile Chemists and Colorists (AATCC) Test Method 127-2008.

5 . The air-permeable absorbent underpad of claim 1 , wherein the substrate backsheet comprises a plurality non-woven substrates.

6 . The air-permeable absorbent underpad of claim 1 , wherein absorbent core comprises a superabsorbent polymer comprising a natural or synthetic polymer with a chemically bonded hydrophilic groups or polymer selected from the group comprising a sodium neutralized cross-linked polyacrylate or polysaccharides.

7 . The air-permeable absorbent underpad of claim 1 , wherein an air permeability of the backsheet ranges from 10 to 35 cubic feet per minute based on the American Society for Testing and Materials (ASTM D737-18) Standard Test Method for Air Permeability of Textile Fabrics.

8 . The air-permeable absorbent underpad of claim 1 , wherein the absorbent core comprises fibers selected from a group comprising, fluff pulp, super absorbent fibers, cellulose acetate fibers, rayon fibers, LYOCELL fibers, polyacrylonitrile fibers, cotton fibers or cotton linter fibers, thermal bonding fibers including polypropylene, polyethylene/polypropylene core sheath, polyester/polypropylene core sheath, or polyester/polyethylene core/sheath.

9 . The air-permeable absorbent underpad of claim 1 , wherein the core comprises a fiber and a super absorbent polymer.

10 . The air-permeable absorbent underpad of claim 1 , wherein the non-woven backsheet does not contain a porous film.

11 . The air-permeable absorbent underpad of claim 1 , wherein the non-woven backsheet has an alcohol repellency AR rating of between about 6 and 8 according to Nonwovens Standard Procedures (“NWSP”) NWSP 080.8.RO.

12 . The air-permeable absorbent underpad of claim 1 , wherein the non-woven backsheet has an alcohol repellency AR rating of between about 7 and 8 according to Nonwovens Standard Procedures (“NWSP”) NWSP 080.8 RO.

13 . The air-permeable absorbent underpad of claim 1 , wherein the underpad does not contain a microporous film.

14 . An air-permeable absorbent underpad configured to prevent liquid from passing from a first side of the absorbent underpad to a second side of the absorbent underpad, the underpad comprising:
a topsheet layer; an absorbent core comprising fibers or a superabsorbent polymer; and a non-woven backsheet comprising:
a first layer of spunbond fibers;
a second layer of spunbond fibers;
a first layer of meltblown fibers;
a second layer of meltblown fibers;
a third layer of meltblown fibers; and
a fourth layer of meltblown fibers, wherein at least one of the layers of the non-woven backsheet is treated with a fluorocarbon, and the non-woven backsheet is configured to prevent liquid absorbed by the absorbent core of the underpad from passing through to the second side of the underpad, and wherein a hydrostatic pressure of the non-woven backsheet is greater than or equal to 60 centimeters and less than or equal to 190 centimeters based on the American Association of Textile Chemists and Colorists (AATCC) Test Method 127-2008, and wherein an air permeability of the non-woven backsheet is greater than or equal to 5 cubic feet per minute and less than or equal to 35 cubic feet per minute based on the American Society for Testing and Materials (ASTM D737-18) Standard Test Method for Air Permeability of Textile Fabrics.

15 . The air-permeable absorbent underpad of claim 14 , wherein the underpad does not contain a microporous film.

16 . A system comprising a low-airloss-bed and an absorbent, air-permeable liquid barrier between a patient and the low-airloss-bed, the system further comprising:
a topsheet layer; an absorbent core comprising fibers or a superabsorbent polymer; and a backsheet comprising:
a first layer of spunbond fibers;
a second layer of spunbond fibers;
a first layer of meltblown fibers;
a second layer of meltblown fibers;
a third layer of meltblown fibers; and
a fourth layer of meltblown fibers, wherein at least one of the layers of the backsheet is treated with a fluorocarbon, and wherein the topsheet layer, the absorbent core, and the backsheet are configured to cover at least a portion of the low-airloss-bed and the backsheet is configured to provide a liquid resistant barrier between the absorbent core and the low-airloss-bed while allowing air from the low-airloss-bed to pass through the non-woven substrate, wherein a hydrostatic pressure of the backsheet is greater than or equal to 60 centimeters and less than or equal to 190 centimeters based on the American Association of Textile Chemists and Colorists (AATCC) Test Method 127-2008, and wherein an air permeability of the backsheet is greater than or equal to 5 cubic feet per minute and less than or equal to 35 cubic feet per minute based on the American Society for Testing and Materials (ASTM D737-18) Standard Test Method for Air Permeability of Textile Fabrics.

17 . The system of claim 16 , wherein the topsheet, absorbent core, and the backsheet do not contain a porous film.

18 . The system of claim 16 , wherein the backsheet does not contain a porous film.

19 . The system of claim 16 , wherein the air-permeable liquid barrier does no

Assignees

• Allegiance Corp

Inventors

• Isaac Walter H

Classifications

• A61F2013/15967

  by meltblown technique · CPC title

• A61F2013/530051

  being made in cross-linked cellulosic fibres · CPC title

• A61F2013/51452

  being nonwovens · CPC title

• A61F2013/15878

  by thermal bonding · CPC title

• A61F2013/15959

  by spunbond technique · CPC title