Beamed elastic laminate properties

Patent metadata

Field	Value
Publication number	US-10987253-B2
Application number	US-201715846360-A
Country	US
Kind code	B2
Filing date	Dec 19, 2017
Priority date	Dec 20, 2016
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

The present disclosure relates to one or a combination of an absorbent article's chassis, inner leg cuffs, outer leg cuffs, ear panels, side panels, waistbands, and belts that may comprise one or more pluralities of tightly spaced (less than 4 mm) and/or low Average-Dtex (less than 300 dtex) and/or low Average-Pre-Strain (less than 300%) elastics to deliver low Pressure Under Strand (less than 1 psi), while providing adequate Section-Modulus (between about 2 gf/mm and 15 gf/mm) to make the article easy to apply and to comfortably maintain the article in place on the wearer, even with a loaded core (holding at least 100 mls of liquid), to provide for the advantages described above. Further, the elastomeric laminates of the present disclosure outperform existing laminates currently used for disposable absorbent articles as it relates to one or more key parameters.

First claim

The invention claimed is:

1. An absorbent article, comprising:
a chassis comprising a topsheet, a backsheet and an absorbent core disposed between the topsheet and the backsheet;
an elastomeric laminate forming at least a portion of an article component selected from the group consisting of a belt, a side panel, an ear panel, a chassis, a topsheet, a backsheet, and combinations thereof;
wherein the elastomeric laminate comprising a first substrate layer and a second substrate layer and a plurality of elastics disposed between the first substrate layer and the second substrate layer;
wherein the plurality of elastics comprises a) from about 40 to about 1000 elastic strands, b) an Average-Strand-Spacing from about 0.25 mm to about 4 mm, c) an Average-Dtex from about 10 to about 500, and d) an Average-Pre-Strain from about 50% to about 400%;
wherein the first substrate layer and second substrate layer each have a Basis Weight from about 6 grams per square meter to about 30 grams per square meter;
wherein the elastomeric laminate has a Percent Contact Area of at least one of: a) greater than about 11% at 100 um, b) greater than about 28% at 200 um, and c) greater than about 51% at 300 um; and
wherein the elastomeric laminate has a 2%-98% Height Value of <1.6 mm.

2. The absorbent article of claim 1 , wherein the plurality of elastics comprises from about 100 to about 650 elastic strands.

3. The absorbent article of claim 1 , wherein the plurality of elastics comprises an Average-Strand-Spacing from about 0.5 mm to about 3.0 mm.

4. The absorbent article of claim 1 , wherein the plurality of elastics comprises an Average-Dtex from about 30 to about 400.

5. The absorbent article of claim 1 , wherein the plurality of elastics comprises an Average-Pre-Strain from about 75% to about 300%.

6. The absorbent article of claim 1 , wherein the elastomeric laminate has an Average Pressure Under Strand from about 0.1 psi to about 1 psi.

7. The absorbent article of claim 1 , wherein the elastomeric laminate has an Air Permeability of at least one of: a) greater than about 40 cubic meters/square meter/minute Air Permeability at 0 gf/mm (no extension); b) greater than about 60 cubic meters/square meter/minute Air Permeability at 3 gf/mm (slight extension); and c) greater than about 80 cubic meters/square meter/minute Air Permeability at 7 gf/mm (moderate extension).

8. The absorbent article of claim 1 wherein the elastomeric laminate has a Water Vapor Transmission Rate of greater than 4000 g/m2/24 hrs.

9. The absorbent article of claim 1 , wherein the elastomeric laminate has a Caliper of at least one of: a) from about 0.5 mm to about 4 mm Caliper at 0 gf/mm (no extension); b) from about 60% to about 95% Caliper Retention Value at 3 gf/mm (slight extension); and c) from about 40% to about 90% Caliper Retention Value at 7 gf/mm (moderate extension).

10. The absorbent article of claim 1 wherein the elastomeric laminate has a Cantilever Bending of less than about 40 mm.

11. The absorbent article of claim 1 , wherein the elastomeric laminate has a Rugosity Frequency of from about 0.2 mm −1 to about 1 mm −1 , and a Rugosity Wavelength of from about 0.5 mm to about 5 mm.

12. An absorbent article, comprising:
a chassis comprising a topsheet, a backsheet and an absorbent core disposed between the topsheet and the backsheet;
an elastomeric laminate forming at least a portion of an article component selected from the group consisting of a waistband, waistcap, inner leg cuff, outer leg cuff, a transverse barrier, and combinations thereof;
wherein the elastomeric laminate comprising a first substrate layer and a second substrate layer and a plurality of elastics disposed between the first substrate layer and the second substrate layer;
wherein the plurality of elastics comprises from about 10 to about 400 elastic strands, an Average-Strand-Spacing from about 0.25 mm to about 4 mm, an Average-Dtex from about 10 to about 500, and an Average-Pre-Strain from about 50% to about 400%;
the first substrate layer and second substrate layer each having a Basis Weight from about 6 grams per square meter to about 30 grams per square meter;
wherein the elastomeric laminate has a Percent Contact Area of at least one of: a) greater than about 11% at 100 um, b) greater than about 28% at 200 um, and c) greater than about 51% at 300 um; and
wherein the elastomeric laminate has a 2%-98% Height Value of <1.6 mm.

13. The absorbent article of claim 12 , wherein the plurality of elastics comprises from about 20 to about 225 elastic strands.

14. The absorbent article of claim 13 , wherein the elastomeric laminate has a Rugosity Frequency of from about 0.2 mm −1 to about 1 mm −1 and a Rugosity Wavelength of from about 0.5 mm to about 5 mm.

15. The absorbent article of claim 12 , wherein the plurality of elastics comprises an Average-Strand-Spacing from about 0.5 mm to about 3.0 mm.

16. The absorbent article of claim 12 , wherein the plurality of elastics comprises an Average-Dtex from about 30 to about 400.

17. The absorbent article of claim 12 , wherein the plurality of elastics comprises an Average-Pre-Strain from about 75% to about 300%.

18. The absorbent article of claim 12 , wherein the elastomeric laminate has an Average Pressure Under Strand from about 0.1 psi to about 1 psi.

19. The absorbent article of claim 12 , wherein the elastomeric laminate has an Air Permeability of at least one of: a) greater than about 40 cubic meters/square meter/minute Air Permeability at 0 gf/mm (no extension); b) greater than about 60 cubic meters/square meter/minute Air Permeability at 3 gf/mm (slight extension); and c) greater than about 80 cubic meters/square meter/minute Air Permeability at 7 gf/mm (moderate extension).

20. The absorbent article of claim 12 , wherein the elastomeric laminate has a Water Vapor Transmission Rate of greater than 4000 g/m2/24 hrs.

21. The absorbent article of claim 12 , wherein the elastomeric laminate has a Caliper of at least one of: a) from about 0.5 mm to about 4 mm Caliper at 0 gf/mm (no extension); b) from about 60% to about 95% Caliper Retention Value at 3 gf/mm (slight extension); and c) from about 40% to about 90% Caliper Retention Value at 7 gf/mm (moderate extension).

22. The absorbent article of claim 12 , wherein the elastomeric laminate has a Cantilever Bending of less than about 40 mm.

23. The absorbent article of claim 12 , wherein the plurality of elastics comprises from about 30 to about 400 elastic strands.

Assignees

• Procter & Gamble

Inventors

• Lavon Gary Dean
• Schneider Uwe
• Seitz Bret Darren
• Wade Sarah Marie
• Eckstein Joseph Allen

Classifications

• A61F13/5622

  specially adapted for diapers or the like · CPC title

• A61F13/53

  characterised by the absorbing medium (A61F13/20 takes precedence) · CPC title

• A61F13/4902

  characterised by the elastic material · CPC title

• A61F13/15739

  Sealing, e.g. involving cutting · CPC title

• A61F13/15 Primary

  Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators · CPC title