Tampon pledget for increased bypass leakage protection

Patent metadata

Field	Value
Publication number	US-10596046-B2
Application number	US-201715486470-A
Country	US
Kind code	B2
Filing date	Apr 13, 2017
Priority date	Nov 8, 2006
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

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, 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 shaped tampon pledget, the tampon pledget having insertion tip region having an insertion tip end and an insertion rearward end, a main body region having a main forward end and a main rearward end, and a withdrawal region having a withdrawal forward end and withdrawal rearward end, said insertion rearward end is adjacent said main forward end, and said main rearward end is adjacent said withdrawal forward end, the shaped tampon pledget has a maximum diameter of the insertion tip region and the main body region where the insertion rearward end and the main forward end meet, wherein the main body region tapers from the maximum diameter to a minimum diameter and thereafter increases to a middle diameter that is greater than said minimum diameter, the compressed tampon pledget having a greater absorption potential near the bottom end of the tampon pledget.

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 1 , 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. The tampon pledget according to claim 1 , wherein the tampon pledget has 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.

9. The tampon pledget according to claim 8 , wherein the tampon pledget expands to a slight teardrop shape upon liquid absorption.

10. A tampon pledget, comprising:
a bottom pad having a length and a width;
a top pad having a width and a length;
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 shaped tampon pledget, the tampon pledget having insertion tip region having an insertion tip end and an insertion rearward end, a main body region having a main forward end and a main rearward end, and a withdrawal region having a withdrawal forward end and withdrawal rearward end, said insertion rearward end is adjacent said main forward end, and said main rearward end is adjacent said withdrawal forward end, the shaped tampon pledget has a maximum diameter of the insertion tip region and the main body region where the insertion rearward end and the main forward end meet, wherein the main body region tapers from the maximum diameter to a minimum diameter and thereafter increases to a middle diameter that is greater than said minimum diameter, the compressed tampon pledget having a greater absorption potential near the bottom end of the tampon pledget.

11. The tampon pledget according to claim 10 , wherein the dry weight of the tampon pledget is about 2.6 grams.

12. The tampon pledget according to claim 10 , wherein the top pad has a length that is between about 2 inches and about 6 inches.

13. The tampon pledget according to claim 10 , wherein the top pad has a width that is between about 1 inch and about 4 inches.

14. The tampon pledget according to claim 10 , wherein the bottom pad has a length that is between about 1 inch and about 4 inches, and a width of about 1 inch and a length of about 4 inches.

15. The tampon pledget according to claim 10 , 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.

16. The tampon pledget according to claim 10 , wherein the cross-pad configuration is folded within a fluted ram.

17. The tampon pledget according to claim 10 , wherein the heating is to about 220° F.

18. The tampon pledget according to claim 10 , wherein at least one of the top pad and the bottom pad comprise cellulose, rayon, cotton, pulp, superabsorbent, absorbent foam, and any combinations thereof.

19. The tampon pledget according to claim 10 , wherein the tampon pledget has 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.

20. The tampon pledget according to claim 19 , wherein the tampon pledget expands to a slight teardrop shape upon liquid absorption.

Assignees

• 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

• A61F13/15203 Primary

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

• A61F2013/15447

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

• A61F13/2068 Primary

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

• A61F13/2028

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