Absorbent articles containing absorbent cores having zoned absorbency and methods of making same
First Claim
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1. An absorbent article having a longitudinal dimension and a lateral dimension comprising:
- a top sheet;
a back sheet; and
an absorbent laminate core disposed at least partially between the top sheet and the back sheet;
wherein the absorbent laminate core is comprised of;
an upper layer;
a lower layer, anda central absorbent layer comprising a mixture of tow fibers and SAP disposed between the upper and lower layer,an adhesive provided on an inner surface of at least one of said upper and lower layers, wherein said inner surface is disposed adjacent to said central absorbent layer therebetween, said adhesive provided at a predetermined location, said SAP being adhered to said adhesive on said inner surface to create higher concentrations of SAP at said predetermined location,wherein the absorbent laminate core contains areas of varying absorbency due to said higher concentrations of SAP at said predetermined location,wherein the upper and lower layer are comprised of the same material, and the material is selected from the group consisting of tissue, airlaid fluff pulp, synthetic non-woven material, and mixtures or combinations thereof, andwherein the upper layer is fluid pervious, and the lower layer is fluid impervious.
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Abstract
The present invention relates generally to an absorbent core for an absorbent article, and more particularly to an absorbent core having zoned absorbency due to specific placement of adhesives or specific lack of adhesive. Such absorbent cores provide the flexibility of creating precise zoning of particular properties throughout the core, and they provide improved comfort and fit.
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Citations
25 Claims
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1. An absorbent article having a longitudinal dimension and a lateral dimension comprising:
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a top sheet; a back sheet; and an absorbent laminate core disposed at least partially between the top sheet and the back sheet; wherein the absorbent laminate core is comprised of; an upper layer; a lower layer, and a central absorbent layer comprising a mixture of tow fibers and SAP disposed between the upper and lower layer, an adhesive provided on an inner surface of at least one of said upper and lower layers, wherein said inner surface is disposed adjacent to said central absorbent layer therebetween, said adhesive provided at a predetermined location, said SAP being adhered to said adhesive on said inner surface to create higher concentrations of SAP at said predetermined location, wherein the absorbent laminate core contains areas of varying absorbency due to said higher concentrations of SAP at said predetermined location, wherein the upper and lower layer are comprised of the same material, and the material is selected from the group consisting of tissue, airlaid fluff pulp, synthetic non-woven material, and mixtures or combinations thereof, and wherein the upper layer is fluid pervious, and the lower layer is fluid impervious. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An absorbent laminate core having a longitudinal dimension and a lateral dimension, the absorbent laminate core comprising:
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an upper layer; a lower layer, and a central absorbent layer comprising a mixture of tow fibers and SAP disposed between the upper and lower layer, an adhesive applied provided on an inner surface of at least one of said upper and lower layers, wherein in said inner surface is disposed adjacent to said central absorbent layer therebetween, said adhesive provided at a predetermined location on said inner surface, said SAP being adhered to said adhesive to create higher concentrations of SAP at said predetermined location, and wherein the absorbent laminate core contains areas of varying absorbency due to said higher concentrations of SAP at said predetermined location.
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22. An absorbent article having a longitudinal dimension and a lateral dimension comprising:
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a top sheet; a back sheet; and an absorbent laminate core disposed at least partially between the top sheet and the back sheet; wherein the absorbent laminate core is comprised of; an upper layer; a lower layer, and a central absorbent layer comprising a mixture of tow fibers and SAP disposed between the upper and lower layer, an adhesive disposed on an inner surface of at least one of said upper and lower layers, wherein said inner surface is disposed adjacent to said central absorbent layer therebetween, said adhesive provided at predetermined locations on said inner surface throughout a lateral cross-section of the laminate core, said SAP being adhered to said adhesive to create higher concentrations of SAP at said predetermined locations, and wherein the absorbent laminate core contains areas of varying absorbency due to said higher concentrations of SAP at said predetermined locations throughout the lateral cross-section of the laminate core. - View Dependent Claims (23, 24)
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25. A method of making an absorbent laminate core having predetermined regions of higher concentrations of SAP, said method comprising:
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a. disposing a mixture of fibers and SAP between upper and lower layers; b. applying an adhesive at predetermined regions on an inner surface of at least one of said upper and lower layers; and c. applying said adhesive prior to disposing said mixture of fibers and SAP between said upper and lower layers, such that SAP is adhered to said adhesive and create higher concentrations of SAP at said predetermined regions.
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Specification