Diaper structure with enhanced tactile softness attributes and providing relatively low humidity

Patent metadata

Field	Value
Publication number	US-10064767-B2
Application number	US-201514614836-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Aug 1, 2012
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A disposable diaper is provided. The diaper comprises a topsheet comprising a first nonwoven web. The topsheet has a basis weight greater than 25 gsm, according to the Basis Weight Test herein. The diaper comprises a backsheet comprising a second nonwoven web and a film. The film has a WVTR value of less than 6,500 g/m 2 , according to the WVTR Test herein. The diaper comprises an absorbent core comprising an absorbent particulate polymer material disposed between the topsheet and the backsheet. The absorbent core is substantially cellulose free. The diaper has a relative humidity of less than 75%, according to the Humidity Test herein.

First claim

What is claimed is:

1. A disposable diaper, comprising:
a topsheet comprising a first nonwoven web, wherein the topsheet has a basis weight greater than 25 gsm, determined according to the Basis Weight Test as disclosed herein, and wherein the first nonwoven web has a compression loft of at least 30%, determined according to the Compression Loft Test as disclosed herein;
a backsheet comprising a second nonwoven web and a film, wherein the film has a WVTR value of less than 6,500 g/m 2 day, determined according to the WVTR Test as disclosed herein;
an absorbent core comprising an absorbent particulate polymer material disposed between the topsheet and the backsheet, wherein the absorbent core is substantially cellulose free;
wherein the disposable diaper has a relative humidity of less than 74%, after insults of a synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

2. The disposable diaper of claim 1 , wherein the disposable diaper has a relative humidity of less than 70%, after the insults of the synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

3. The disposable diaper of claim 1 , wherein the disposable diaper has a relative humidity of less than 65%, after the insults of the synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

4. The disposable diaper of claim 1 , wherein the disposable diaper has a relative humidity in the range of about 50% to about 70%, after the insults of the synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

5. The disposable diaper of claim 1 , wherein the topsheet has a basis weight greater than 30 gsm, determined according to the Basis Weight Test as disclosed herein.

6. The disposable diaper of claim 1 , wherein the topsheet has a basis weight greater than 35 gsm, determined according to the Basis Weight Test as disclosed herein.

7. The disposable diaper of claim 1 , wherein the topsheet has a basis weight in the range of about 26 gsm to about 45 gsm, determined according to the Basis Weight Test as disclosed herein.

8. The disposable diaper of claim 1 , comprising an acquisition/distribution system positioned at least partially intermediate the topsheet and the absorbent core, wherein the acquisition/distribution system comprises a first layer comprising a nonwoven material having a basis weight greater than about 40 gsm, determined according to the Basis Weight Test as disclosed herein.

9. The disposable diaper of claim 8 , wherein the acquisition/distribution system comprises a second layer comprising cross-linked cellulose fibers.

10. The disposable diaper of claim 1 , wherein the first nonwoven web has apertures defined therethrough.

11. The disposable diaper of claim 1 , wherein the first nonwoven web has a three-dimensional texture defined therein.

12. The disposable diaper of claim 1 , wherein the first nonwoven web forms at least 50 percent of a wearer-facing planar surface area of the diaper as defined and circumscribed by an outer profile of the diaper.

13. The disposable diaper of claim 1 , wherein the first nonwoven web has a static coefficient of friction equal to or less than 0.4.

14. The disposable diaper of claim 1 , wherein the first nonwoven web has a kinetic coefficient of friction equal to or less than 0.35.

15. The disposable diaper of claim 1 , wherein the first nonwoven web comprises crimped fibers.

16. The disposable diaper of claim 15 , wherein the crimped fibers comprise multicomponent fibers, and wherein the multicomponent fibers have at least two polymer components having differing properties and disposed in either side-by-side configuration or eccentric core/sheath configuration.

17. The disposable diaper of claim 1 , wherein the absorbent core comprises:
a first substrate;
a second substrate; and
a thermoplastic adhesive material disposed on or within the absorbent particulate polymer material;
wherein the absorbent particulate polymer material is disposed intermediate the first and second substrates.

18. A package comprising a plurality of the disposable diapers of claim 1 , wherein the package has an in-bag stack height of less than 85 mm, determined according to the In-Bag Stack Height Test as disclosed herein.

19. A disposable diaper, comprising:
a topsheet comprising a first nonwoven web, and wherein the first nonwoven web has a compression loft of at least 30%, determined according to the Compression Loft Test as disclosed herein;
a backsheet comprising a second nonwoven web and a film, wherein the second nonwoven web forms a portion of an outermost layer of the diaper, and wherein the film has a WVTR value of less than 6,500 g/m 2 day, determined according to the WVTR Test as disclosed herein; and
an absorbent core comprising an absorbent particulate polymer material disposed between the topsheet and the outermost layer, wherein the absorbent core is substantially cellulose free;
wherein the first nonwoven web and the second nonwoven web have a combined basis weight of at least 40 gsm, determined according to the Basis Weight Test as disclosed herein; and
wherein the disposable diaper has a relative humidity of less than 70%, after insults of a synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

20. The disposable diaper of claim 19 , wherein the disposable diaper has a relative humidity of less than 68%, after the insults of the synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

21. The disposable diaper of claim 19 , wherein the disposable diaper has a relative humidity of less than 65%, after the insults of the synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

22. The disposable diaper of claim 19 , wherein the disposable diaper has a relative humidity in the range of about 50% to about 70%, after the insults of the synthetic urine solution are applied to the diaper, determined according to the Humidity Test as disclosed herein.

23. The disposable diaper of claim 19 , wherein the first nonwoven web and the second nonwoven web have a combined basis weight of at least 45 gsm, determined according to the Basis Weight Test as disclosed herein.

24. The disposable diaper of claim 19 , wherein the first nonwoven web and the second nonwoven web have a combined basis weight of at least 50 gsm, determined according to the Basis Weight Test as disclosed herein.

25. The disposable diaper of claim 19 , wherein the first nonwoven web and the second nonwoven web have a combined basis weight of at least 55 gsm, determined according to the Basis Weight Test as disclosed herein.

26. The disposable diaper of claim 19 , wherein the ratio of the basis weight of the first nonwoven web to the basis weight of the second nonwoven web is from 30/70 to 70/30.

27. The disposable diaper of claim 19 , wherein the first nonwoven web and the second nonwoven web each have an opacity greater than 10%.

28. The disposable diaper of claim 19 , wherein the first nonwoven web or the second nonwoven web has a static coefficient of friction equal to or less than 0.4.

Assignees

• Procter & Gamble

Inventors

• Ferrer John
• Young Sharon Ann
• Purdon Mike P
• Xu Han
• Weisman Paul Thomas

Classifications

• A61F13/51476

  being three-dimensional, e.g. embossed, textured, pleated, or with three-dimensional features, like gathers or loops · CPC title

• A61L15/24

  Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)} · CPC title

• A61F2013/51338

  having improved touch or feeling, e.g. smooth film · CPC title

• A61F2013/51019

  being cellulosic material · CPC title

• A61F13/51456

  characterised by its properties · CPC title