IP Library › Granted Patent US 12,303,369
Granted Patent B2
US 12,303,369 · App. 16/466,245 · Granted May 20, 2025

Absorbent laminates, absorbent cores and disposable articles utilizing the absorbent laminates, and related methods

Inventors: Paul M. Ducker (Saint Simons Island, GA); Harry J. Chmielewski (Wake Forest, NC)
A61F13/534A61F13/513A61F2013/530547A61F2013/530613A61F2013/5307B32B5/022B32B5/08B32B7/12B32B2262/062B32B2307/54B32B2307/726B32B2309/105
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Quick Facts
Patent No.
US 12,303,369
App. No.
16/466,245
Granted
May 20, 2025
Kind
B2
Abstract

Absorbent multi-layer laminates with SAP on both sides of a middle substrate that comprises wettable cellulosic fibers. Also absorbent cores including such absorbent laminates. Absorbent articles such as protective underwear, adult briefs, baby diapers and nursing pads including such absorbent cores, and patient-support pads such as underpads and sacral pads including such absorbent laminates and cores.

Claims (43)

1. An absorbent laminate comprising:

a first sublayer comprising super-absorbent polymer (SAP) particles and an adhesive supporting the SAP particles in a porous matrix;

a second sublayer comprising SAP particles and an adhesive supporting the SAP particles in a porous matrix; and

a third sublayer disposed between, and bonded to each of, the first and second layers, wherein the third sublayer is not itself a laminate, and wherein the third sublayer comprises a nonwoven web having a basis weight of from 6 gsm to 80 gsm,

wherein the basis weight of the SAP particles of the first sublayer is different than the basis weight of the SAP particles of the second sublayer,

wherein the SAP particles of one of the first sublayer or the second sublayer have a basis weight of from 20 grams per square meter (gsm) to 80 gsm, and

wherein the SAP particles of the other of the first sublayer or the second sublayer have a basis weight of less than 50 gsm.

2. The absorbent laminate of claim 1 , where the third sublayer comprises a spunlace nonwoven web having a basis weight of from 20 gsm to 80 gsm.

3. The absorbent laminate of claim 1 , where the third sublayer comprises a tissue with a basis weight of from 15 gsm to 35 gsm.

4. The absorbent laminate of claim 1 , where the third sublayer comprises regenerated cellulosic fibers.

5. The absorbent laminate of claim 1 , further comprising:

a fourth sublayer bonded to the first sublayer such that the first sublayer is disposed between the fourth sublayer and the third sublayer, the fourth sublayer comprising tissue; and

a fifth sublayer bonded to the second sublayer such that the second sublayer is disposed between the fifth sublayer and the third sublayer, the fifth sublayer comprising tissue.

6. The absorbent laminate of claim 5 , where the absorbent laminate has a caliper of less than 1.3 millimeters (mm).

7. The absorbent laminate of claim 5 , where the tissue of at least one of the fourth and fifth sublayers is creped and/or through-air dried.

8. An absorbent core for a disposable absorbent article, the absorbent core comprising:

one or more pieces of the absorbent laminate of claim 1 defining a plurality of layers of the absorbent laminate.

9. The absorbent core of claim 8 , where a single piece of the absorbent laminate is folded to define the plurality of layers of the absorbent laminate.

10. The absorbent core of claim 8 , where multiple pieces of the absorbent laminate are stacked to define the multiple layers of the absorbent laminate.

11. The absorbent core of claim 8 , where the absorbent core is configured to exhibit a resiliency greater than 70% when partially hydrated.

12. The absorbent core of claim 8 , where the absorbent core is configured to exhibit a Stress-Based Softness for a second compression cycle, at a pressure of 5×10 3 Pa, of less than 150×10 3 Pa when a 100 mm×100 mm section of the absorbent core is dosed with 145 milliliters (mL) of water.

13. The absorbent core of claim 8 , where the absorbent core is configured to exhibit a Strain-Based Softness for a second compression cycle, at a strain of 10%, of less than 4×10 −3 Pa when a 100 mm×100 mm section of the absorbent core is dosed with 100 milliliters (mL) of water.

14. A disposable absorbent article comprising:

a liquid-permeable topsheet;

a liquid-impermeable backsheet; and

an absorbent core disposed between the topsheet and the backsheet, the absorbent core comprising one or more pieces of the absorbent laminate of claim 1 defining a plurality of layers of the absorbent laminate.

15. The absorbent article of claim 14 , where the absorbent article does not include a discrete acquisition-distribution layer in addition to the absorbent core.

16. The absorbent article of claim 14 , where the absorbent article is a bed pad, and the absorbent core has a width of at least 12 inches and a length of at least 18 inches.

17. A disposable patient-support article comprising:

a support core comprising one or more pieces of the absorbent laminate of claim 1 that define a plurality of layers of the absorbent laminate; and

a liquid impermeable layer coupled to the support core;

where the support core has a width of at least 8 inches and a length of at least 8 inches.

18. The patient-support article of claim 17 , where the liquid-impermeable layer is a backsheet, and the patient-support article further comprises:

a topsheet;

where the support core is disposed between the backsheet and the topsheet such that the backsheet and topsheet form an enclosure in which the support core is disposed.

19. The patient-support article of claim 17 , where the backsheet and topsheet cooperate to define at least a portion of a chassis of a bed pad or underpad.

20. The absorbent core of claim 8 , further comprising:

an additional piece of the absorbent laminate coupled to an outermost one of the sublayers of the absorbent laminate, the additional piece of the absorbent laminate comprising:

a first sublayer comprising super-absorbent polymer (SAP) particles and an adhesive supporting the SAP particles in a porous matrix, the SAP particles in the first sublayer having a basis weight of from 20 grams per square meter (gsm) to 130 gsm;

a second sublayer comprising SAP particles and an adhesive supporting the SAP particles in a porous matrix, the SAP particles in the second sublayer having a basis weight of from 20 gsm to 130 gsm; and

a third sublayer disposed between, and bonded to each of, the first and second layers, the third sublayer comprising a nonwoven web, the nonwoven web having a basis weight of from 6 gsm to 80 gsm;

a fourth sublayer bonded to the first sublayer such that the first sublayer is disposed between the fourth sublayer and the third sublayer, the fourth sublayer comprising tissue; and

a fifth sublayer bonded to the second sublayer such that the second sublayer is disposed between the fifth sublayer and the third sublayer, the fifth sublayer comprising tissue.

Assignments (6)
SECURITY AGREEMENT (ABL) Recorded Mar 3, 2021
From: ASSOCIATED HYGIENIC PRODUCTS LLC; ATTENDS HEALTHCARE PRODUCTS, INC.
To: BARCLAYS BANK PLC, AS COLLATERAL AGENT
Reel/Frame 055476/0256 →
SECURITY AGREEMENT (TERM) Recorded Mar 2, 2021
From: ASSOCIATED HYGIENIC PRODUCTS LLC; ATTENDS HEALTHCARE PRODUCTS, INC.
To: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Reel/Frame 055564/0308 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2020
From: EAM CORPORATION
To: ATTENDS HEALTHCARE PRODUCTS, INC.
Reel/Frame 051597/0644 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2020
From: DUCKER, PAUL M.; CHMIELEWSKI, HARRY
To: DOMTAR PAPER COMPANY, LLC
Reel/Frame 051598/0012 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2020
From: DOMTAR PAPER COMPANY, LLC
To: ATTENDS HEALTHCARE PRODUCTS, INC.
Reel/Frame 051598/0155 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2020
From: DUCKER, PAUL M.
To: EAM CORPORATION
Reel/Frame 051678/0691 →
Continuity (3)
Provisional Application 62505218 · May 12, 2017
Provisional Application 62434156 · Dec 14, 2016
Related Publication 20200060895A1 · Feb 27, 2020
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