Web having apertures with convex sides
View Patent ↗An apertured material comprising a web and a plurality of apertures in the web, each aperture having at least two vertices with a convex flap of the web spanning a pair of the vertices.
1. A three-dimensional apertured web having a first plurality of apertures, each aperture being defined by sidewalls that originate on a first surface of the web and depend therefrom and terminate in an apex beyond a second surface of the web, each aperture further having at least a pair of vertices and a convex flap of said web spanning said pair of vertices, said convex flap forming at least one of said sidewalls and being movable in an up and down motion in response to stress applied normal to an axis defined a respective said pair of vertices and independent from the remainder of the web.
2. The three-dimensional apertured web of claim 1 , wherein each aperture comprises three or more vertices with a convex flap between each pair of said vertices.
3. The three-dimensional apertured web of claim 1 , wherein each aperture comprises four vertices with four convex flaps between said vertices.
4. The three-dimensional apertured web of claim 1 , wherein the convex flap is defined by a convex wall that curves away from a plane of the web.
5. The three-dimensional apertured web of claim 1 , wherein said vertices are aligned in a machine direction.
6. The three-dimensional apertured web of claim 1 , wherein said web is nonelastic.
7. The three-dimensional apertured web of claim 1 , wherein said web is an extruded web.
8. The three-dimensional apertured web of claim 1 , wherein said web is a nonwoven.
9. The three-dimensional apertured web of claim 1 , wherein said web comprises bonded or unbonded fibers.
10. The three-dimensional apertured web of claim 1 , further comprising a second plurality of apertures which are not defined by one or more convex walls.
11. An absorbent article comprising:
a three-dimensional aperture web comprising a first plurality of apertures, each aperture being defined by sidewalls that originate on a first surface of the web and depend therefrom and terminate in an apex beyond a second surface of the web, each aperture further having at least a pair of vertices with a convex flap of said web spanning said pair of vertices, said convex flap forming at least one of said sidewalls and being movable in an up and down motion in response to stress applied normal to an axis defined a respective said pair of vertices and independent from the remainder of the web; and
an absorbent layer below said three-dimensional apertured web.
12. The absorbent article of claim 11 wherein said article is configured to fit between the legs of a user.
13. The absorbent article of claim 11 , further comprising a nonwoven layer bonded to said first surface of said three-dimensional apertured web.
14. A user-worn absorbent article comprising the absorbent article of claim 12 .
15. A method of using a user-worn absorbent article, said article comprising a three-dimensional aperture web comprising a first plurality of apertures, each aperture being defined by sidewalls that originate on a first surface of the web and depend therefrom and terminate in an apex beyond a second surface of the web, each aperture further having at least a pair of vertices with a convex flap of said web spanning said pair of vertices, said convex flap forming at least one of said sidewalls and being movable in an up and down motion in response to stress applied normal to an axis defined a respective said pair of vertices and independent from the remainder of the web and an absorbent layer below said web, said method comprising:
positioning said article in the crotch area of a user between the user's legs; and
periodically stretching and relaxing said article through the movement of said legs, said periodic stretching and relaxing causing said pair of vertices to periodically separate and return, thereby causing said convex flap to move up and down to move exudates away from said user and into said absorbent layer.
16. The method of claim 15 , wherein said periodic stretching and relaxing of said article results from moving the legs forward and backward during walking or crawling.
17. The method of claim 15 , wherein said fluid has a viscosity of greater than 14.2 s.