Tampon pledget for increased bypass leakage protection

Patent metadata

Field	Value
Publication number	US-9877877-B2
Application number	US-201213624243-A
Country	US
Kind code	B2
Filing date	Sep 21, 2012
Priority date	May 17, 2007
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

The present invention provides a tampon pledget with one or more of the following properties: increased absorbency rate; high absorbent capacity and fluid retention; rapid expansion potential; and ease of ejection of the pledget from the applicator. Surprisingly, the one or more properties are achieved by using a modified dual cross-pad, folded, compressed tampon pledget design.

First claim

What is claimed is:

1. A tampon pledget for a super absorbency tampon having an absorbency between 9-12 grams, comprising:
at least one bottom pad having a length, a width and a thickness, the length of the bottom pad being approximately 4 inches and the width of the bottom pad being approximately 2 inches, the bottom pad consisting essentially of viscose rayon fiber and having a weight between about 0.94 grams and about 1.78 grams;
at least one top pad having a length, a width, and a thickness, said at least one top pad positioned on said at least one bottom pad, the length of the top pad being approximately 4 inches and the width of the top pad being approximately 2 inches, the top pad consisting essentially of viscose rayon fiber and having a weight between about 0.76 grams and about 1.46 grams; and
a withdrawal string;
wherein said at least one top pad and said at least one bottom pad are in a cross-pad configuration such that said at least one top pad is centered on said at least one bottom pad, wherein said at least one top pad extends longitudinally across the width of said at least one bottom pad such that said at least one top pad is substantially perpendicular to said at least one bottom pad;
wherein said top and bottom pads being folded to form said pledget such that said at least one bottom pad forms an inner core of said pledget and said at least one top pad forms an outer layer of said pledget;
wherein after the folded formation, said tampon pledget is compressed into a self-sustaining cylindrical shape with a tapered insertion end, the cylindrical shape has a uniform diameter at a given cross-section of said tampon pledget, the overall length of said compressed pledget is less than the length or the width of either the at least one bottom pad and at least one top pad, said tampon pledget including said withdrawal string having an average mass that is about 2.6 g, the tampon pledget having an average absorbency rate that is between about 0.322 g/g/sec and about 0.362 g/g/sec between 2 and 5 seconds of a GATS test,
wherein at least ten samples of said tampon pledget have been measured to determine said average mass and said average absorbency rate.

2. The tampon pledget as defined in claim 1 , wherein prior to forming, said at least one bottom pad has an area that is identical to said at least one top pad.

3. The tampon pledget as defined in claim 1 , wherein after formation, said tampon pledget has an absorbent capacity between about 4.10 g/g and about 4.82 g/g.

4. The tampon pledget as defined in claim 1 , wherein after formation, said tampon pledget has an ejection force between about 11.46 oz. and about 20.27 oz.

5. The tampon pledget as defined in claim 1 , wherein said bottom pad has a weight of about 1.26 g.

6. The tampon pledget as defined in claim 1 , wherein said top pad has a weight of about 1.01 g.

7. The tampon pledget as defined in claim 1 , wherein said withdrawal string is made of cotton.

8. The tampon pledget as defined in claim 1 , in combination with a plastic barrel applicator, the barrel applicator including erucamide.

9. The tampon pledget as defined in claim 1 , wherein said bottom pad consists essentially of a blend of staple viscose rayon fibers and multilobal viscose rayon fibers.

10. The tampon pledget as defined in claim 1 , wherein said bottom pad consists essentially of multilobal viscose rayon fibers.

11. The tampon pledget as in any one of claims 1 , 9 , and 10 , wherein said top pad consists essentially of a blend of staple viscose rayon fibers and multilobal viscose rayon fibers.

12. The tampon pledget as in any one of claims 1 , 9 , and 10 , wherein said bottom pad consists essentially of staple viscose rayon fibers.

Assignees

• Edgewell Personal Care Brands Llc

Inventors

• Edgett Keith
• Jorgensen Robert
• Dougherty Eugene
• Abdul Yinka

Classifications

• A61F13/2065

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

• A61F13/20

  Tampons, e.g. catamenial tampons; Accessories therefor · CPC title

• A61F13/2068

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

• A61F13/2071 Primary

  characterised by the material or the structure of the outer layer · CPC title

• A61F13/2051

  characterised by the material or the structure of the inner absorbing core · CPC title