Absorbent articles having an apertured topsheet comprising cellulose-based fibers
The present invention relates absorbent article having a wearer facing surface and a garment facing surface, the absorbent article comprising: a topsheet, a backsheet, and a layer of absorbent material disposed between the topsheet and the backsheet, wherein the topsheet comprises a first layer comprising cellulose-based fibers, the first layer comprising a first surface, an opposite second surface, and a plurality of apertures having side walls, wherein the first surface of the first layer forms at least part of the wearer facing surface; wherein the first surface of the first layer comprises at least one non-aperture area having a first non-aperture area contact angle as measured by Contact Angle Test; and wherein each of majority of the apertures has a side wall having an aperture contact angle as measured by Contact Angle Test, the aperture contact angle being higher than the first non-aperture area contact angle.
1 . An absorbent article having a wearer facing surface and a garment facing surface, the absorbent article comprising a topsheet, a backsheet, and a layer of absorbent material disposed between the topsheet and the backsheet,
wherein the topsheet comprises a first layer comprising cellulose-based fibers, the first layer comprising a first surface, an opposite second surface, and a plurality of apertures, wherein the first surface of the first layer forms at least part of the wearer facing surface;
wherein the first surface of the first layer comprises a hydrophilic non-aperture area having a first non-aperture area contact angle as measured by Contact Angle Test; and
wherein at least some of the plurality of the apertures have a side wall having an aperture contact angle as measured by Contact Angle Test, the aperture contact angle being higher than the first non-aperture area contact angle; and
wherein the first non-aperture area contact angle and the aperture contact angle have a difference of at least about 30°.
2 . The absorbent article of claim 1 , wherein the aperture contact angle is equal to or higher than about 40° as measured by Contact Angle Test.
3 . The absorbent article of claim 1 , wherein the first layer further comprises thermoplastic fibers.
4 . The absorbent article of claim 1 , wherein the non-aperture area does not comprise a treatment.
5 . The absorbent article of claim 1 , wherein the non-aperture area is treated with a hydrophilic treatment.
6 . The absorbent article of claim 1 , wherein the side wall of each aperture is coated with a treatment with a HLB value not higher than about 13.
7 . The absorbent article of claim 1 , wherein the apertures are formed by pin aperturing process.
8 . The absorbent article of claim 1 , wherein the first layer comprises a plurality of protrusions extending outwardly, away from the absorbent core.
9 . The absorbent article of claim 1 , wherein the topsheet further comprises a second layer with a first surface, an opposing second surface, a plurality of apertures in such a way that the first surface of the second layer is in a face to face relationship with the second surface of the first layer.
10 . The absorbent article of claim 9 , wherein the second layer comprises thermoplastic fibers.
11 . The absorbent article of claim 9 , wherein the second surface of the second layer comprises at least one non-aperture area having a second non-aperture area contact angle, the second non-aperture area contact angle being not greater than the first non-aperture area contact angle.
12 . The absorbent article of claim 1 , wherein the first layer is a spunlace nonwoven layer.
13 . The absorbent article of claim 1 , wherein the apertures in the first layer have at least 3% of open area.
14 . An absorbent article having a wearer facing surface and a garment facing surface, the absorbent article comprising a topsheet, a backsheet, and a layer of absorbent material disposed between the topsheet and the backsheet,
wherein the topsheet comprises a first layer comprising cellulose-based fibers, the first layer comprising a first surface, an opposite second surface, and a plurality of apertures, wherein the first surface of the first layer forms at least part of the wearer facing surface;
wherein the first surface of the first layer comprises a hydrophilic non-aperture area having a first non-aperture area contact angle as measured by Contact Angle Test; and
wherein a majority of the apertures have a side wall having an aperture contact angle as measured by Contact Angle Test, the aperture contact angle being higher than the first non-aperture area contact angle; and
wherein the first non-aperture area contact angle and the aperture contact angle have a difference of at least about 30°.
15 . The absorbent article of claim 14 , wherein at least 90% of the apertures have a side wall having an aperture contact angle as measured by Contact Angle Test.
16 . An absorbent article having a wearer facing surface and a garment facing surface, the absorbent article comprising a topsheet, a backsheet, and a layer of absorbent material disposed between the topsheet and the backsheet,
wherein the topsheet comprises a first layer comprising cellulose-based fibers, the first layer comprising a first surface, an opposite second surface, and a plurality of apertures, wherein the first surface of the first layer forms at least part of the wearer facing surface;
wherein the first surface of the first layer comprises a hydrophilic non-aperture area having a first non-aperture area contact angle as measured by Contact Angle Test; and
wherein the first layer within the plurality of apertures is partially interpenetrated into a second layer within the plurality of apertures, and wherein the first layer within the apertures comprises a higher contact angle than the second layer within the apertures;
wherein a majority of the apertures has a side wall having an aperture contact angle as measured by Contact Angle Test, the aperture contact angle being higher than the first non-aperture area contact angle; and
wherein the first non-aperture area contact angle and the aperture contact angle have a difference of at least about 30°.
17 . The absorbent article of claim 16 , wherein the second layer within the plurality of apertures is not completely covered by the first layer within the plurality of apertures.
18 . The absorbent article of claim 17 , wherein the second layer within the plurality of apertures is exposed in an area proximate to a bottom edge of the apertures.
19 . The absorbent article of claim 16 , wherein the apertures comprise an open area of from about 2.5% to about 10%.