End seal for an absorbent article
The present invention relates to absorbent articles, such as diapers and sanitary napkins, and cores useful for such articles. More specifically, the invention relates to an absorbent article having a longitudinal centerline and a transverse centerline, the absorbent article comprising an absorbent core, the core comprising a storage layer and a wearer facing side oriented towards a wearer when the article is being worn and an opposed garment facing side, the absorbent article further comprising a liquid pervious topsheet on the wearer facing side of the core and a liquid pervious backsheet on the garment facing side of the core, the core further comprising a first core wrap sheet covering the wearer facing side of the storage layer and a second core wrap sheet covering the garment facing side of the storage layer the first core wrap sheet being joined to the second core wrap sheet along at least one transverse stripe of juncture, wherein the stripe of juncture covers a total area and the stripe of juncture provides a bond strength of at least 1 N/cm between the first core wrap sheet and a second core wrap sheet as measured as tensile strength in the longitudinal direction and wherein the stripe of juncture comprises an open area of at least 20% of the total area.
1. A disposable absorbent article comprising:
a longitudinal axis;
a transverse axis;
a topsheet;
a backsheet; and
an absorbent core disposed between the topsheet and the backsheet, wherein the absorbent core includes:
a first core wrap sheet;
a second core wrap sheet
a storage layer, including superabsorbent particles, disposed between the first core wrap sheet and the second core wrap sheet; and
at least one stripe of juncture joining the first core wrap sheet to the second core wrap sheet,
wherein the stripe of juncture includes a plurality of bonded areas that are separated from each other by a plurality of unbonded areas, wherein each of the unbonded areas is open to the storage layer, wherein the stripe of junction defines a total area, the plurality of unbonded areas defines an open area, and the open area is at least 20% of the total area.
2. The disposable absorbent article of claim 1 , wherein the open area is from about 30% to about 95% of the total area.
3. The disposable absorbent article of claim 1 , wherein the plurality of bonding elements are provided by thermo-mechanical bonding.
4. The disposable absorbent article of claim 1 , wherein the open area is at least 50% of the total area.
5. The disposable absorbent article of claim 1 , wherein each of the unbonded areas has a width that is 0.5 to 2 millimeters.
6. The disposable absorbent article of claim 1 , wherein the superabsorbent particles have a mean diameter, and each of the unbonded areas has a width that is 0.5 to 10 times the mean diameter.
7. The disposable absorbent article of claim 1 , wherein the superabsorbent particles have a mean diameter, and each of the unbonded areas has a width that is 1 to 5 times the mean diameter.
8. The disposable absorbent article of claim 1 , wherein each of the bonded areas has a width that is 0.5 to 2 millimeters.
9. The disposable absorbent article of claim 1 , wherein the superabsorbent particles have a mean diameter, and each of the bonded areas has a width that is 0.2 to 3 times the mean diameter.
10. The disposable absorbent article of claim 1 , wherein the superabsorbent particles have a mean diameter, and each of the bonded areas has a width that is 0.5 to 2 times the mean diameter.
11. The disposable absorbent article of claim 1 , wherein the superabsorbent particles have a mean diameter, and each of the bonded areas has a width that is 0.8 to 1.2 times the mean diameter.
12. The disposable absorbent article of claim 1 , wherein the plurality of bonding elements are provided by adhesive bonding.
13. The disposable absorbent article of claim 1 , wherein the plurality of bonding elements are provided by ultrasonic bonding.
14. The disposable absorbent article of claim 1 , wherein the plurality of bonding elements are disposed in a linear pattern.
15. The disposable absorbent article of claim 1 , wherein:
the core wrap has a transverse periphery; and
the stripe of juncture joins the first core wrap sheet to the second core wrap sheet along the transverse periphery.
16. The disposable absorbent article of claim 1 , wherein:
the core wrap has a first transverse periphery and a second transverse periphery;
the stripe of juncture is a first stripe of juncture, the plurality of bonded areas is a first plurality of bonded areas, the plurality of unbonded areas is a first plurality of unbonded areas, the total area is a first total area, and the open area is a first open area;
the first stripe of juncture joins the first core wrap sheet to the second core wrap sheet along the first transverse periphery; and
a second stripe of juncture joins the first core wrap sheet to the second core wrap sheet along the second transverse periphery, wherein the second stripe of juncture includes a second plurality of bonded areas that are separated from each other by a second plurality of unbonded areas, wherein each of the unbonded areas is open to the storage layer, wherein the second stripe of junction has a second total area, the second plurality of unbonded areas defines a second open area, and the second open area is at least 20% of the second total area.
17. The disposable absorbent article of claim 1 , wherein:
the core wrap has a longitudinal periphery; and
the stripe of juncture joins the first core wrap sheet to the second core wrap sheet along the longitudinal periphery.
18. The disposable absorbent article of claim 1 , wherein:
the core wrap has a first longitudinal periphery and a second longitudinal periphery;
the stripe of juncture is a first stripe of juncture, the plurality of bonded areas is a first plurality of bonded areas, the plurality of unbonded areas is a first plurality of unbonded areas, the total area is a first total area, and the open area is a first open area;
the first stripe of juncture joins the first core wrap sheet to the second core wrap sheet along the first longitudinal periphery; and
a second stripe of juncture joins the first core wrap sheet to the second core wrap sheet along the second longitudinal periphery, wherein the second stripe of juncture includes a second plurality of bonded areas that are separated from each other by a second plurality of unbonded areas, wherein each of the unbonded areas is open to the storage layer, wherein the second stripe of junction has a second total area, the second plurality of unbonded areas defines a second open area, and the second open area is at least 20% of the second total area.
19. The disposable absorbent article of claim 1 , which is a diaper.