Tampon pledget for increased bypass leakage protection

Patent metadata

Field	Value
Publication number	US-9687389-B2
Application number	US-201615157792-A
Country	US
Kind code	B2
Filing date	May 18, 2016
Priority date	Nov 8, 2006
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

There is provided a tampon pledget that includes one or more enhanced features that result in the pledget exhibiting increased bypass leakage prevention. These enhanced features may include, but are not limited to, geometry, absorption, and any combinations thereof. There is also provided one or more methods for constructing a tampon pledget having increased bypass leakage protection.

First claim

What is claimed is:

1. A tampon pledget for a super absorbency tampon, comprising:
a bottom pad having a length that is between about 1 inch and about 4 inches, and a width that is between about 1 inch and about 4 inches;
a top pad having a width of about 2 inches and a length of about 4 inches;
a fiber weight distribution ratio of the bottom pad to the top pad being between about 0.75:1 and about 1.5:1; and
wherein prior to folding the bottom pad and the top pad to form a compressed tampon pledget, the top pad and the bottom pad are in a cross-pad configuration, the cross-pad configuration having an overlap portion that is formed where the top pad and the bottom pad overlap and a plurality of non-overlap portions that are formed where the top pad and the bottom pad do not overlap,
wherein the cross-pad configuration is folded, compressed, and heated to form a tampon pledget with a generally cylindrical shape having a main body region, an insertion end, and a bottom end, the compressed tampon pledget having a greater absorption potential near the bottom end of the tampon pledget, the tampon pledget having an average positive displacement rate that is equivalent to a volumetric rate increase of the tampon pledget in a modified syngyna absorbency test divided by a dry weight of the tampon pledget, the average positive displacement rate being greater than about 0.2 ml/min/gram and resulting in an expansion of the tampon pledget to a slight teardrop shape upon liquid absorption.

2. The tampon pledget according to claim 1 , wherein the dry weight of the tampon pledget is about 2.6 grams.

3. The tampon pledget according to claim 1 , wherein the width of the bottom pad is about 2 inches.

4. The tampon pledget according to claim 1 , wherein a pad lay-up ratio of an area of the bottom pad to an area of the top pad area is between about 1:1.2 and about 1:2.25.

5. The tampon pledget according to claim 1 , wherein the cross-pad configuration is folded within a fluted ram.

6. The tampon pledget according to claim 5 , wherein the heating is to about 220° F.

7. The tampon pledget according to claim 1 , wherein at least one of the top pad and the bottom pad comprise cellulose, rayon, cotton, pulp, superabsorbent, absorbent foam, and any combinations thereof.

8. A tampon pledget for a super absorbency tampon, comprising:
a bottom pad having a length that is between about 1 inch and about 4 inches, a width in a range from about 1.5 inches to about 3 inches;
a top pad having a length in a range of 3.5 inches to 5 inches and a width in a range from about 1.5 inches to about 3 inches;
a fiber weight distribution ratio of the bottom pad to the top pad being between about 0.75:1 and about 1.5:1; and
wherein prior to folding the bottom pad and the top pad to form a compressed tampon pledget, the top pad and the bottom pad are in a cross-pad configuration, the cross-pad configuration having an overlap portion that is formed where the top pad and the bottom pad overlap and a plurality of non-overlap portions that are formed where the top pad and the bottom pad do not overlap,
wherein the cross-pad configuration is folded, compressed, and heated to form a generally cylindrical tampon pledget having an insertion end and a bottom end, the compressed tampon pledget having a greater absorption potential near the bottom end of the tampon pledget, the tampon pledget having an average positive displacement rate that is equivalent to a volumetric rate increase of the tampon pledget in a modified syngyna absorbency test divided by a dry weight of the tampon pledget, the average positive displacement rate being greater than about 0.2 ml/min/gram and resulting in an expansion of the tampon pledget to a slight teardrop shape upon liquid absorption.

9. The tampon pledget according to claim 8 , wherein the dry weight of the tampon pledget is about 2.6 grams.

10. The tampon pledget according to claim 9 , wherein the top pad has a width of about 2 inches.

11. The tampon pledget according to claim 10 , wherein the bottom pad has a width of about 2 inches.

12. The tampon pledget according to claim 8 , wherein the top pad has a width of about 2 inches.

13. The tampon pledget according to claim 12 , wherein the bottom pad has a width of about 2 inches.

14. The tampon pledget according to claim 8 , wherein a pad lay-up ratio of an area of the bottom pad to an area of the top pad area is between about 1:1.2 and about 1:2.25.

15. The tampon pledget according to claim 8 , wherein the cross-pad configuration is folded within a fluted ram.

16. The tampon pledget according to claim 8 , wherein the heating is to about 220° F.

17. A tampon pledget for a super absorbency tampon, comprising:
a first pad;
a second pad;
a fiber weight distribution ratio of the first pad to the second pad being between about 0.75:1 and about 1.5:1; and
wherein prior to folding the first pad and the second pad to form a compressed tampon pledget, the second pad and the first pad are in a cross-pad configuration, the cross-pad configuration having an overlap portion that is formed where the second pad and the first pad overlap and a plurality of non-overlap portions that are formed where the second pad and the first pad do not overlap,
wherein the cross-pad configuration is folded and compressed to form a tampon pledget with a generally cylindrical shape having a main body region, an insertion end, and a bottom end, the compressed tampon pledget having a greater absorption potential near the bottom end of the tampon pledget, the tampon pledget having an average positive displacement rate that is equivalent to a volumetric rate increase of the tampon pledget in a modified syngyna absorbency test divided by a dry weight of the tampon pledget, the average positive displacement rate being greater than about 0.200 ml/min/gram and resulting in an expansion of the tampon pledget to a slight teardrop shape upon liquid absorption.

18. The tampon pledget according to claim 17 , wherein the dry weight of the tampon pledget is about 2.6 grams.

19. The tampon pledget according to claim 17 , wherein the second pad has a length that is between about 2 inches and about 6 inches.

20. The tampon pledget according to claim 19 , wherein the second pad has a width that is between about 1 inch and about 4 inches.

21. The tampon pledget according to claim 20 , wherein the second pad has a width of about 2 inches and a length of about 4 inches.

22. The tampon pledget according to claim 21 , wherein the first pad has a length that is between about 1 inch and about 4 inches, and a width that is between about 1 inch and about 4 inches.

23. The tampon pledget according to claim 20 , wherein a pad lay-up ratio of an area of the first pad to an area of the second pad area is between about 1:1.2 and about 1:2.25.

24. The tampon pledget according to claim 17 , wherein a pad lay-up ratio of an area of the first pad to an area of the second pad area is between about 1:1.2 and about 1:2.25.

25. The tampon pledget according to claim 17 , wherein the first pad has a length that is between about 1 inch and about 4 inches.

26. The tampon pledget according to claim 25 , wherein the first pad has a width that is between about 1 inch and about 4 inches.

Assignees

• Edgewell Personal Care Brands Llc
• Edgewell Personal Care Brands Llc

Inventors

• Jorgensen Robert
• Edgett Keith

Classifications

• A61F13/2065

  Tampons folded from sheets of material (A61F13/206 takes precedence) · CPC title

• A61F13/2068 Primary

  Tampons made from several layers (A61F13/2065, A61F13/206 take precedence) · CPC title

• A61F2013/15447

  Fibre dimension, e.g. denier or tex · CPC title

• A61F13/15203 Primary

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

• A61F13/2028

  adapted to change of shape after absorption of liquid · CPC title