Breathable disposable sanitary product construction and backsheet therefor

A disposable absorbent sanitary article including a plurality of materials comprising, from the skin-facing side outwardly:

• (A) a topsheet of liquid and vapor-permeable hydrophilic material;
• (B) a core of highly absorbent material disposed outwardly of said topsheet for absorbing liquid received through said topsheet, said core having an inner surface in liquid communication with said topsheet and an outer surface;
• and
• (C) a backsheet for limiting the outward escape of liquid therethrough while enabling the outward escape of heat and water vapor therethrough, said backsheet being disposed at least partially as an outer surface of the construction and formed from:
• (i) a hydrophobic and vapor permeable front layer selected from the group consisting of (a) an at least two-layer spunbond-meltblown non-woven fabric formed of a spunbond layer and a meltblown layer and (b) an at least three-layer spunbond-meltblown-spunbond non-woven fabric formed of two spunbond layers and a meltblown layer disposed intermediate said spunbond layers and bonding them together;
• (ii) a hydrophobic and vapor permeable back layer selected from the group consisting of (a) an at least two-layer spunbond-meltblown non-woven fabric formed of a spunbond layer and a meltblown layer and (b) an at least three-layer spunbond-meltblown-spunbond non-woven fabric formed of two spunbond layers and a meltblown layer disposed intermediate said spunbond layers and bonding them together;
• (iii) liquid-absorbent particles disposed intermediate said front and back layers, said front and back layers of said backsheet define a pouch containing said particles;
• and
• (iv) a binder for said particles and for binding said front and back layers of said backsheet together, said binder being ethyl vinyl acetate or polyethylene.

A backsheet for a disposable absorbent sanitary article comprising:

• a backsheet for limiting the outward escape of liquid therethrough while enabling the outward escape of heat and water vapor therethrough, said backsheet being adapted to be disposed at least partially as an outer layer of the construction:
• (i) a front layer selected from the group consisting of (a) an at least two-layer spunbond-meltblown non-woven fabric formed of a spunbond layer and a meltblown layer and (b) an at least three-layer spunbond-meltblown-spunbond non-woven fabric formed of two spunbond layers and a meltblown layer disposed intermediate said spunbond layers and bonding them together;
• (ii) a back layer selected from the group consisting of (a) an at least two-layer spunbond-meltblown non-woven fabric formed of a spunbond layer and a meltblown layer and (b) an at least three-layer spunbond-meltblown-spunbond non-woven fabric formed of two spunbond layers and a meltblown layer disposed intermediate said spunbond layers and bonding them together;
• and
• (iii) liquid-absorbent particles disposed intermediate said front and back layers.

A backsheet for a disposable absorbent sanitary article comprising:

• a backsheet for limiting the outward escape of liquid therethrough while enabling the outward escape of heat and water vapor therethrough, said backsheet being adapted to be disposed at least partially as an outer layer of the construction and formed from:
• (i) a hydrophobic and vapor permeable front layer selected from the group consisting of (a) an at least two-layer spunbond-meltblown non-woven fabric formed of a spunbond layer and a meltblown layer and (b) an at least three-layer spunbond-meltblown-spunbond non-woven fabric formed of two spunbond layers and a meltblown layer disposed intermediate said spunbond layers and bonding them together;
• (ii) a hydrophobic and vapor permeable back layer selected from the group consisting of (a) an at least two-layer spunbond-meltblown non-woven fabric formed of a spunbond layer and a meltblown layer and (b) an at least three-layer spunbond-meltblown-spunbond non-woven fabric formed of two spunbond layers and a meltblown layer disposed intermediate said spunbond layers and bonding them together;
• (iii) liquid-absorbent particles disposed intermediate said front and back layers, said front and back layers of said backsheet define a pouch containing said particles;
• and
• (iv) a binder for said particles and for binding said front and back layers of said backsheet together, said binder being ethyl vinyl acetate or polyethylene.