Apertured nonwoven composites and method for making
View Patent ↗An absorbent article has a body facing side which is positioned against the users body. The absorbent article is made of, at least, a backsheet, an absorbent core, and a composite topsheet. The backsheet is opposite the body facing side. The absorbent core is between the backsheet and the body facing side. The composite topsheet is between the absorbent core and the body facing side. The composite topsheet includes a resilient three dimensional apertured formed film, a nonwoven web small scale apertures, and large scale apertures. The formed film is between the absorbent core and the body facing side. The formed film has a male side and a female side opposite the male side, and small scale apertures with a mesh count. The nonwoven web of fibers is between the formed film and the body facing side of the absorbent article. The large scale apertures extend through the nonwoven web and the formed film. The large scale apertures have a mesh count which is less than the mesh count of the small scale apertures.
1. An absorbent article with a body facing side, the absorbent article comprising:
a backsheet opposite the body facing side;
an absorbent core between the backsheet and the body facing side; and
a composite topsheet between the absorbent core and the body facing side, said composite topsheet comprising:
a resilient three-dimensional apertured formed film between the absorbent core and the body facing side, said formed film having a male side with protrusions and a female side with lands opposite the male side, and small scale apertures having a mesh count;
a nonwoven web of fibers between the formed film and the body facing side of the absorbent article; and
a plurality of three-dimensional conical shaped apertures in the nonwoven layer that extend through the formed film, said apertures having a mesh count which is less than the mesh count of the small scale apertures.
2. The absorbent article of claim 1 wherein the male side of the formed film faces the nonwoven web.
3. The absorbent article of claim 1 wherein the female side of the formed film faces the nonwoven web.
4. The absorbent article of claim 1 wherein said three-dimensional conical shaped apertures in the nonwoven layer taper from a larger opening to a smaller opening, the larger opening being between the smaller opening and the body facing side.
5. The absorbent article of claim 4 wherein the nonwoven layer has generally unconsolidated fibers near the larger opening and generally consolidated fibers near the smaller opening.
6. The absorbent article of claim 4 wherein fibers of said nonwoven web are bonded at said smaller opening by melted portions of said formed film.
7. The absorbent article of claim 1 wherein the mesh count of the small scale apertures is between about 20 apertures/cm 2 and about 200 apertures/cm 2 .
8. The absorbent article of claim 1 wherein the mesh count of the small scale apertures is between about 50 apertures/cm 2 and about 100 apertures/cm 2 .
9. The absorbent article of claim 1 wherein the mesh count of the small scale apertures is about 90 apertures/cm 2 .
10. The absorbent article of claim 1 wherein the mesh count of the apertures in the nonwoven is between about 2 apertures/cm 2 and about 50 apertures/cm 2 .
11. The absorbent article of claim 1 wherein the mesh count of the apertures in the nonwoven is between about 3 apertures/cm 2 and about 30 apertures/cm 2 .
12. The absorbent article of claim 1 wherein the mesh count of the apertures in the nonwoven is between about 6 apertures/cm 2 and about 11 apertures/cm 2 .
13. The absorbent article of claim 1 wherein the mesh count of the small scale apertures is between about 5 and about 25 times the mesh count of the apertures in the nonwoven.
14. The absorbent article of claim 1 wherein the mesh count of the small scale apertures is between about 10 and about 20 times the mesh count of the apertures in the nonwoven.
15. The absorbent article of claim 1 wherein the mesh count of the small scale apertures is about 15 times the mesh count of the apertures in the nonwoven.
16. The absorbent article of claim 1 wherein the nonwoven web is selected from the group consisting of an airthrough bonded nonwoven, a carded thermobonded nonwoven, and a spunbond meltblown spunbond nonwoven.
17. The absorbent article of claim 1 wherein the nonwoven web is selected from the group consisting of polypropylene fibers, polyethylene fibers, and a combination of polypropylene and polyethylene fibers.
18. The absorbent article of claim 1 wherein the nonwoven web is comprised of polyester fibers.
19. The absorbent article of claim 1 wherein the formed film is comprised of low density polyethylene.
20. The absorbent article of claim 1 wherein the body facing side of the formed film is coated with a surfactant.
21. A composite topsheet comprising a resilient three-dimensional apertured formed film, said formed film having a male side with protrusions and a female side with lands opposite the male side, and small scale apertures having a mesh count; a nonwoven web of fibers; and a plurality of three-dimensional conical shaped apertures in the nonwoven layer that extend through the formed film, said apertures having a mesh count which is less than the mesh count of the small scale apertures, made by a method comprising:
forming a resilient three dimensional apertured formed film having a male side and a female side, said formed film being formed with small scale apertures having a mesh count;
forming a nonwoven web of fibers;
joining the nonwoven web with the apertured formed film; and
aperturing the joined nonwoven web and formed film to create three-dimensional conical shaped apertures in the joined nonwoven web and formed film, a plurality of said three-dimensional conical shaped apertures in the nonwoven layer created at a mesh count that is less than the mesh count of the small scale apertures.
22. The composite topsheet of claim 21 wherein the forming of the resilient three dimensional apertured formed film is performed by vacuum forming of the film.
23. The composite topsheet of claim 21 wherein the forming of the nonwoven web of fibers is formed by one of airthrough bonding, carded thermobonding, or spunbond meltblown spunbonding.
24. The composite topsheet of claim 1 wherein the joining of the nonwoven web to the formed film includes the addition of an adhesive between the nonwoven web and the formed film.
25. The composite topsheet of claim 1 wherein the aperturing of the joined nonwoven web and formed film secures the nonwoven web to the formed film.
26. The composite topsheet of claim 25 wherein the nonwoven web is secured to the formed film by the fusing of the fibers of the nonwoven web to portions of the formed film at the three-dimensional conical shaped apertures in the nonwoven layer.
27. The composite topsheet of claim 25 wherein the nonwoven web is secured to the formed film by the melting of the formed film near the three-dimensional conical shaped apertures in the nonwoven layer.
28. The composite topsheet of claim 25 wherein the nonwoven web is secured to the formed film by the melting of a plurality of the fibers in the nonwoven web near the three-dimensional conical shaped apertures in the nonwoven layer.
29. The composite topsheet of claim 21 wherein a three-dimensional conical shaped apertures in the nonwoven layer is formed by a heated needle mating into a shaped recess such that the apertures are resilient three dimensional.
30. The composite topsheet of claim 29 wherein the three-dimensional conical shaped apertures in the nonwoven layer is shaped by a contacting surface of the needle and the shaped recess such that the fibers of the nonwoven web are selectively fused only in the vicinity of the contacting surface.
31. An absorbent article with a body facing side, the absorbent article comprising:
a backsheet opposite the body facing side;
an absorbent core between the backsheet and the body facing side; and
a composite topsheet between the absorbent core and the body facing side, said composite topsheet comprising:
a stiffening means between the absorbent core and the body facing side, said stiffening means having openings with a hydraulic radius;
a nonwoven web of fibers between the stiffening means and the body facing side of the absorbent article, said nonwoven web of fibers having an average radius of the fibers; and
a plurality of three-dimensional conical shaped apertures in the nonwoven layer that extend through the stiffening means, said apertures having a hydraulic radius which is substantially greater than the hydraulic radius of the openings of the stiffening means.
32. The absorbent article of claim 31 wherein the stiffening means comprises a resilient three-dimensional apertured formed film between the absorbent core and the body facing side, said formed film having a male side and a female side opposite the male side.
33. The absorbent article of claim 31 wherein the stiffening means comprises a stiffer nonwoven layer of fibers having a larger average radius of fibers.