Absorbent article having improved bonding

Patent metadata

Field	Value
Publication number	US-9504613-B2
Application number	US-201113310271-A
Country	US
Kind code	B2
Filing date	Dec 2, 2011
Priority date	Dec 2, 2010
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

An absorbent article is provided. The absorbent article includes a liquid pervious film topsheet having a body facing surface and a garment facing surface; a backsheet having a body facing surface and a garment facing surface; an absorbent core having a body facing surface and a garment facing surface, the absorbent core being provided between the topsheet and the backsheet; and a bonding layer having a body facing surface and a garment facing surface. The body facing surface of the bonding layer has a fibrous matrix comprising cellulosic fibers and thermoplastic fibers, and the garment facing surface of the topsheet is directly bonded to the body facing surface of the bonding layer at discrete adhesive-free bond points.

First claim

What is claimed is:

1. An absorbent article comprising:
a liquid pervious film topsheet having a body facing surface and a garment facing surface;
a backsheet having a body facing surface and a garment facing surface;
an absorbent core having a body facing surface and a garment facing surface, the absorbent core being provided between the topsheet and the backsheet; and
a bonding layer having a body facing surface and a garment facing surface, the body facing surface of the bonding layer having a fibrous matrix comprising cellulosic fibers and thermoplastic fibers, wherein the garment facing surface of the topsheet is directly bonded to the body facing surface of the bonding layer at discrete adhesive-free bond points;
wherein the bonding points covers between 10% to about 20% of the total surface area of a first end region and of a second end region,
wherein the ratio of the basis weight of the cellulosic fibers to the basis weight of the thermoplastic fibers is greater than about 1:1,
wherein the absorbent article is a sanitary napkin, and
wherein a circle comprising a diameter between 2 and 12 mm can be inscribed between at least two adjacent bond points.

2. The absorbent article of claim 1 , wherein the bonding layer is part of the absorbent core.

3. The absorbent article of claim 1 , wherein the thermoplastic fibers are bicomponent fibers.

4. The absorbent article of claim 3 , wherein the bicomponent fibers are from about 2 to about 10 decitex.

5. The absorbent article of claim 1 , wherein the topsheet and the bonding layer are bonded together using melt fusion bonding.

6. The absorbent article of claim 1 , wherein the absorbent article is a sanitary napkin or pantyliner.

7. An absorbent article comprising:
a liquid pervious film topsheet having a body facing surface and a garment facing surface;
a backsheet having a body facing surface and a garment facing surface;
an absorbent core having a body facing surface and a garment facing surface, the absorbent core being provided between the topsheet and the backsheet; and
a bonding layer having a body facing surface and a garment facing surface, the body facing surface of the bonding layer having a fibrous matrix comprising cellulosic fibers and thermoplastic fibers and the garment facing surface of the bonding layer being different from the body facing surface of the bonding layer, wherein the garment facing surface of the topsheet is directly bonded to the body facing surface of the bonding layer at discrete bond points; wherein the bonding points covers between 10% to about 20% of the total surface area of a first end region and of a second end region, wherein the ratio of the basis weight of the cellulosic fibers to the basis weight of the thermoplastic fibers is greater than about 1:1, wherein the absorbent article is a sanitary napkin, and wherein a circle comprising a diameter between 2 and 12 mm can be inscribed between at least two adjacent bond points.

8. The absorbent article of claim 7 , wherein the garment facing surface of the bonding layer comprises a carrier web.

9. The absorbent article of claim 7 , wherein the thermoplastic fibers are bicomponent fibers.

10. The absorbent article of claim 7 , wherein the bond points are adhesive-free.

11. The absorbent article of claim 7 , wherein the topsheet and the bonding layer are bonded together using melt fusion bonding.

12. An absorbent article comprising:
a liquid pervious film topsheet having a body facing surface and a garment facing surface, the topsheet comprising a plurality of discrete protruded extensions extending only from a first surface of the precursor web and macroapertures;
a backsheet having a body facing surface and a garment facing surface;
an absorbent core having a body facing surface and a garment facing surface that is provided between the topsheet and the backsheet; and
a bonding layer having a body facing surface and a garment facing surface, the body facing surface of the bonding layer having a fibrous matrix comprising cellulosic fibers and thermoplastic fibers, wherein the garment facing surface of the topsheet is directly bonded to the body facing surface of the bonding layer at discrete bond adhesive-free bond points; wherein the bonding points covers between 10% to about 20% of the total surface area of a first end region and of a second end region, wherein the ratio of the basis weight of the cellulosic fibers to the basis weight of the thermoplastic fibers is greater than about 1:1, wherein the absorbent article is a sanitary napkin, and wherein a circle comprising a diameter between 2 and 12 mm can be inscribed between at least two adjacent bond points.

13. The absorbent article of claim 12 , wherein the ratio of the basis weight of the cellulosic fibers to the basis weight of the thermoplastic fibers is from about 1:1 to about 4:1.

14. The absorbent article of claim 12 , wherein the thermoplastic fibers are bicomponent fibers.

15. The absorbent article of claim 14 , wherein the bicomponent fibers are from about 2 to about 10 decitex.

16. The absorbent article of claim 12 , wherein the topsheet and the bonding layer are bonded together using melt fusion bonding.

17. The absorbent article of claim 12 , wherein the garment facing surface of the bonding layer comprises a carrier web.

Assignees

• Geilich Ralf
• Carla Vito
• Rawat Digvijay
• Glassmeyer Ronda Lynn
• Cecchetto Pietro
• Bewick-Sonntag Christopher
• Seib Christian
• Procter & Gamble

Inventors

• Geilich Ralf
• Carla Vito
• Rawat Digvijay
• Glassmeyer Ronda Lynn
• Cecchetto Pietro
• Bewick-Sonntag Christopher
• Seib Christian

Classifications

• A61F13/539 Primary

  characterised by the connection of the absorbent layers with each other or with the outer layers · CPC title

• A61F13/5116 Primary

  being formed of multiple layers (A61F13/5123 takes precedence) · CPC title

• A61F2013/51182

  with non-continuous bonding · CPC title

• A61F13/15699

  Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs · CPC title

• A61F2013/5395

  with thermoplastic agent, i.e. softened by heat · CPC title