Absorbent barrier structures having a high convective air flow rate and articles made therefrom

An absorbent article comprising an absorbent core and an absorbent barrier structure, wherein the absorbent barrier structure has

• a hydrohead value of at least about 10 mBars;
• a convective air permeability of at least about 10 Darcy/mm;
• and
• a liquid impact transmission value of less than about 20 g/m2 and wherein said absorbent barrier structure is substantially free of a film;
• and wherein the barrier structure comprises:
• a reservoir zone, and a barrier zone at least partially disposed between the absorbent core and the reservoir zone, and wherein the reservoir zone has a porous structure selected from the group consisting of a fibrous web, a fibrous wad, a foam, and combinations thereof, and wherein at least one surface of the reservoir zone or the barrier zone is treated with a hydrophobic agent, wherein the hydrophobic agent is a fluorocarbon.

An absorbent article comprising an absorbent core, a topsheet, an outer cover and an absorbent barrier structure, wherein the absorbent barrier structure has

• a hydrohead value of at least about 10 mBars;
• a convective air permeability of at least about 10 Darcy/mm;
• and
• a liquid impact transmission value of less than about 20 g/m2 and wherein said absorbent barrier structure is substantially free of a film;
• and wherein the barrier structure comprises:
• a reservoir zone, and a barrier zone at least partially disposed between the absorbent core and the reservoir zone, and wherein the reservoir zone has a porous structure selected from the group consisting of a fibrous web, a fibrous wad, a foam, and combinations thereof, and wherein the absorbent core is disposed between the topsheet and the outer cover;
• and the absorbent barrier structure is disposed between the absorbent core and the outer cover;
• wherein a combination of the absorbent barrier structure and the outer cover has
• a hydrohead value of at least about 25 mBars;
• a convective air permeability of at least about 10 Darcy/mm;
• a liquid impact transmission value of less than about 20 g/m2;
• and
• MVTR of no more than 3500 g/m2/24 hrs.

An absorbent article comprising an absorbent core, a topsheet, an outer cover and an absorbent barrier structure, wherein the absorbent barrier structure has

• a hydrohead value of at least about 10 mBars;
• a convective air permeability of at least about 10 Darcy/mm;
• and
• a liquid impact transmission value of less than about 20 g/m2 and wherein said absorbent barrier structure is substantially free of a film;
• and wherein the barrier structure comprises:
• a first barrier zone disposed adjacent to a garment-facing surface of the absorbent core, a reservoir zone disposed between the first barrier zone and the outer cover, and second barrier zone disposed at least partially between the reservoir zone and die outer cover, and wherein the reservoir zone has a porous structure selected from the group consisting of a fibrous web, a fibrous wad, a foam, and combinations thereof, and wherein the absorbent core is disposed between the topsheet and the outer cover;
• and the absorbent barrier structure is disposed between the absorbent core and the outer cover;
• wherein a combination of the absorbent barrier structure and the outer cover has
• a hydrohead value of at least about 25 mBars;
• a convective air permeability of at least about 10 Darcy/mm;
• and
• a liquid impact transmission value of less than about 20 g/m2.

An absorbent article comprising an absorbent core and a barrier structure, wherein the barrier structure has

• a convective air permeability of greater than about 10 Darcy/mm;
• a liquid impact transmission value of less than about 20 g/m2;
• and
• a post-compression air permeability decrease of no more than about 35% and wherein said absorbent barrier structure is substantially free of a film;
• and wherein the barrier structure comprises:
• a reservoir zone, and a barrier zone at least partially disposed between the absorbent core and the reservoir zone, wherein the reservoir zone comprises a fibrous web and has an absorbency at least about 20% less than that of the absorbent core and the barrier zone has a hydrohead value that is higher than that of the reservoir zone and that of the absorbent core.

An absorbent article comprising an absorbent core, a topsheet, an outer cover and a barrier structure, wherein the barrier structure has

• a convective air permeability of greater than about 10 Darcy/mm;
• a liquid impact transmission value of less than about 20 g/m2;
• and
• a post-compression air permeability decrease of no more than about 35% and wherein said absorbent barrier structure is substantially free of a film;
• and wherein the barrier structure comprises:
• a reservoir zone, and a barrier zone at least partially disposed between the absorbent core and the reservoir zone, wherein the reservoir zone comprises a fibrous web, and wherein the absorbent core is disposed between the topsheet and the outer cover;
• and the barrier structure is disposed between the absorbent core and the outer cover;
• wherein a combination of the barrier structure and the outer cover has
• a hydrohead value of at least about 10 mBars;
• a convective air permeability of at least about 10 Darcy/mm;
• and
• a liquid impact transmission value of less than about 20 g/m2.