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US 6,168,849 AGranted
Multilayer cover system and method for producing same
AssigneeKimberly-Clark Worldwide, Inc.
InventorsJaime Braverman, Michael Allen Daley, Arthur Edward Garavaglia, Rebecca Griffin, Tamara Lee Mace, David Wayne Primm, Eugenio Go Varona, Ali Yahiaoui
Life of this patent
Estimating the term…
Abstract
A multilayer material suitable for use as a cover or topsheet for personal care absorbent articles such as diapers, sanitary pads, adult incontinence garments, training pants and the like having a top layer and a bottom, where the top layer forms a plurality of apertures and contacts the bottom layer in land areas disposed between the apertures. The bottom layer has a permeability substantially equivalent to, or higher than, the top layer.
Claims58
A multilayer material comprising:
- a top layer and a bottom layer, said top layer forming a plurality of top layer apertures and having land areas between said apertures, said top layer in said land areas contacting said bottom layer, and said bottom layer having a permeability one of substantially equivalent to and higher than said top layer and a void volume one of substantially equivalent to and greater than said top layer, whereby said permeability of said top layer is in a range of about 3% to about 12% of the permeability of said bottom layer.
A method for producing a multilayer cover for a personal care absorbent article comprising:
- forming a first layer of a material selected from the group consisting of nonwovens, wovens, foams, fibrous structures, and mixtures and combinations thereof and a composite of film and nonwovens, film and wovens, film and foams, and film and fibrous structures, said first layer having an upper surface and a lower surface;
- forming a second layer of said material, said second layer having one of a substantially equivalent and lower permeability and one of a substantially equivalent and lower void volume than said first layer, said second layer permeability being in a range of about 3% to about 12% of said first layer permeability;
- placing said second layer on said upper surface of said first layer;
- and
- forming a plurality of second layer apertures in at least said second layer one of before and after said placing of said second layer.
2 more elements
A personal care absorbent article comprising:
- a cover material comprising a top layer and a bottom layer, said top layer forming a plurality of top layer apertures and having land areas between said apertures, said top layer in said land areas contacting said bottom layer, said top layer and said bottom layer comprising at least one material selected from the group consisting of nonwovens, wovens, foams, fibrous structures, and mixtures and combinations thereof and a composite of film and nonwovens, film and wovens, film and foams, and film and fibrous structures, and said bottom layer having one of a substantially equivalent and higher permeability and one of a substantially equivalent and greater void volume than said top layer, said top layer permeability being in a range of about 3% to about 12% of said bottom layer permeability.
A sanitary pad comprising:
- a cover material comprising a top layer and a bottom layer, said top layer forming a plurality of top layer apertures and having land areas between said apertures, said top layer in said land areas contacting said bottom layer, said top layer and said bottom layer comprising at least one material selected from the group consisting of nonwovens, wovens, foams, fibrous structures, and mixtures and combinations thereof and a composite of film and nonwovens, film and wovens, film and foams, and film and fibrous structures, and said bottom layer having one of a substantially equivalent and higher permeability and one of a substantially equivalent and greater void volume than said top layer said top layer permeability being in a range of about 3% to about 12% of said bottom layer permeability.
A diaper comprising:
- a cover material comprising a top layer and a bottom layer, said top layer forming a plurality of top layer apertures and having land areas between said apertures, said top layer in said land areas contacting said bottom layer, said top layer and said bottom layer comprising at least one material selected from the group consisting of nonwovens, wovens, foams, fibrous structures, and mixtures and combinations thereof and a composite of film and nonwovens, film and wovens, film and foams, and film and fibrous structures, and said bottom layer having one of a substantially equivalent and higher permeability and one of a substantially equivalent and greater void volume than said top layer, said top layer permeability being in a range of about 3% to about 12% of said bottom layer permeability.
A multilayer material comprising:
- a top layer and a bottom layer, said top layer forming a plurality of top layer apertures and having land areas between said apertures, said top layer in said land areas contacting said bottom layer, and said bottom layer having a permeability one of substantially equivalent to and higher than said top layer, a void volume one of substantially equivalent to and greater than said top layer, and a wettability one of substantially equivalent to and greater than said top layer.
A multilayer material comprising:
- a top layer and a bottom layer, said top layer forming a plurality of top layer apertures and having land areas between said apertures, said top layer in said land areas contacting said bottom layer, and said top layer having a top layer permeability in a range of about 3% to about 12% of a bottom layer permeability.
Dependencies are inferred from the claim text.