Absorbent barrier structures having a high convective air flow rate and articles made therefrom
Absorbent articles which provide superior protection against wet through under impact or sustained pressure, and high convective air flow therethrough for skin health and comfort benefits. In particular, 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/m 2 .
1. An absorbent article comprising:
a. a topsheet;
b. an outer cover;
c. an absorbent core disposed between the topsheet and the outer cover;
d. an absorbent barrier structure is disposed between the absorbent core and the outer cover 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/m 2 and wherein said absorbent barrier structure is substantially free of a film; and wherein said barrier structure comprises:
1) a first barrier zone disposed adjacent to a garment-facing surface of the absorbent core and a reservoir zone disposed between the barrier zone and the outer cover;
2) a second barrier zone disposed at least partially between the reservoir zone and the outer cover
3) a dampness management means disposed between the absorbent barrier structure and the outer cover, or between the reservoir zone and one of the barrier zones
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/m 2 .
2. The absorbent structure of claim 1 wherein the absorbent barrier structure, the dampness management means and the outer cover together has a MVTR of no more than 4500 g/m 2 /24 hrs.
3. The absorbent structure of claim 1 wherein the dampness management means is an apertured film having no more than about 20% open surface area.
4. An absorbent article comprising:
a. a topsheet;
b. an outer cover that is a nonwoven web or apertured film;
c. an absorbent core disposed between the topsheet and the outer cover; and
d. an absorbent barrier structure that is substantially free of a film is disposed between the absorbent core and the outer cover and comprising:
1) a first fibrous barrier zone that is a nonwoven web and is disposed adjacent to a garment-facing surface of the absorbent core;
2) a reservoir zone that is a cellulosic web and is disposed between the first fibrous barrier zone and the outer cover;
3) a second fibrous barrier zone disposed between the reservoir zone and the outer cover; and
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/m 2 ; and
a post-compression air permeability decrease of no more than about 35%; and
wherein the combination of the absorbent 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.
5. The absorbent article of claim 4 further comprising a dampness management means disposed between the barrier structure and the outer cover or between the reservoir zone and one of the barrier zones.
6. The absorbent article of claim 5 wherein the dampness management means is an apertured film having less than about 20% open surface area.