초록 ▼

A disposable absorbent article includes a topsheet, a backsheet and an absorbent core disposed therebetween. One or more of the backsheet, topsheet, and absorbent core is constructed of an absorbent composite that includes an absorbent layer of hydratable fine fibers in the form of microfibril obtai

A disposable absorbent article includes a topsheet, a backsheet and an absorbent core disposed therebetween. One or more of the backsheet, topsheet, and absorbent core is constructed of an absorbent composite that includes an absorbent layer of hydratable fine fibers in the form of microfibril obtained from cellulose or a derivative thereof and super absorbent polymer (SAP) particles bonded together by the hydratable fibers, and a nonwoven substrate supporting the absorbent layer such as SMS. The absorbent layer is coated over the surface of the nonwoven substrate. The core may include one uniform layer of the absorbent composite or a composite having one layer of the nonwoven substrate and a plurality of segmented absorbent layers applied thereon. In the latter design, the absorbent layers are spaced apart from one another to expose surface sections of the substrate. These non-coated surface sections provide wicking zones which allow room for the absorbent layers to expand and prevent gel blocking.

대표청구항 ▼

1. A disposable absorbent article comprising:a topsheet;a backsheet; andan absorbent core disposed therebetween;wherein said absorbent core is constructed of a first absorbent composite includingan absorbent layer of hydratable fine fibers in the form of microfibril obtained from cellulose or a deri

1. A disposable absorbent article comprising:a topsheet;a backsheet; andan absorbent core disposed therebetween;wherein said absorbent core is constructed of a first absorbent composite includingan absorbent layer of hydratable fine fibers in the form of microfibril obtained from cellulose or a derivative thereof, and super absorbent polymer (SAP) particles bonded together by said hydratable fibers, a coating of mineral oil over said SAP particles of said absorbent layer, said coating being adapted to retard the initial receipt of liquid by said SAP in said absorbent layer, anda nonwoven substrate supporting said absorbent layer, said absorbent layer being coated thereupon; anda pair of longitudinally-extending, upstanding cuffs spaced laterally from said core, each said cuff including a folded portion of said topsheet and a longitudinally-extending absorbent composite section secured within said folded portion, said longitudinally-extending absorbent composite section including an absorbent layer of hydratable fine fibers in the form of microfibril obtained from cellulose or a derivative thereof, an super absorbent polymer (SAP) particles bonded together by said hydratable fibers, and a nonwoven substrate supporting said absorbent layer, said absorbent layer being coated thereupon; andwherein said first absorbent composite of said core and said longitudinally extending absorbent composite sections of said cuffs are distinct swellable SAP sections of one continuous absorbent composite structure positioned about a crotch region of said article, said continuous absorbent composite structure being folded between each said longitudinally extending absorbent composite section and said absorbent core to form a substantially non-swellable intersection therebetween; andwherein said absorbent layer includes a low cross link SAP adapted to gel block upon wetting such that said backsheet is substantially impervious when wet and said backsheet is breathable when dry; andwherein said SAP are water-swellable particles included in a concentration in the range of about 50 g/m 2 to about 500 g/m 2 . 2. The article of claim 1, wherein said nonwoven substrate is a section of said topsheet. 3. The absorbent article of claim 1, wherein said first absorbent composite is a prefabricated sheet. 4. The absorbent article of claim 3, wherein said first absorbent composite of said core includes a plurality of said absorbent layers, said layers being spaced apart from one another such that non-coated surface sections of said substrate are exposed therebetween. 5. The absorbent article of claim 4, wherein said non-coated surface sections form wicking zones between said absorbent layers. 6. The absorbent article of claim 1, wherein said first absorbent composite forms said backsheet and said core, said backsheet having a section providing said nonwoven substrate and said absorbent layer being concentrated at a crotch region of said backsheet to form said absorbent core. 7. The absorbent article of claim 1, wherein said first absorbent composite further includes a concentration of pulp material, said absorbent layer and said nonwoven substrate forming a sheet disposed about said pulp concentration such that said pulp concentration is disposed between at least two layers of said sheet of absorbent layer and nonwoven substrate. 8. The absorbent article of claim 1, wherein said first absorbent composite forms at least a portion of said topsheet and said absorbent core, said topsheet having a section providing said nonwoven substrate and said absorbent layer forming said core. 9. The absorbent article of claim 1, wherein said absorbent layer includes low-cross link, low gel strength SAP having free swell capacities of over 40 g/g and such that said absorbent layer is adapted to gel block upon wetting so as to be substantially impervious but is breathable when dry. 10. The disposable absorbent article of claim 1, wherein said non-swellable intersection between said absorbent core and each said longitudinally-extending absorbent composites, is a non-swellable, non-SAP coated band. 11. A disposable absorbent article comprising:a topsheet;a backsheet;a pair of longitudinally-extending upstanding cuffs, each cuff having two sheet layers;a continuous absorbent composite includingan absorbent layer of hydratable fine fibers in the form of microfibril obtained from cellulose or a derivative thereof, and absorbent polymer (SAP) particles bonded together by said hydratable fibers, anda nonwoven substrate supporting said absorbent layer, said absorbent layer being coated thereupon; andwherein said absorbent layer is disposed between said topsheet and said backsheet, and generally centrally at a location identified as a crotch region, said absorbent layer providing a swellable absorbent core for absorbing bodily exudates received in said crotch region; andwherein said cuffs are spaced laterally from said absorbent core, and wherein said continuous absorbent composite includes two swellable longitudinally-extending composite sections extending upwardly from said crotch region into said cuffs and between the cuff layers, said continuous absorbent composite forming an absorbent structure about said crotch region; andwherein said SAP are water-swellable bodies included in a concentration of about 20 gsm and said nonwoven substrate is a spunbond/meltblown/spunbond (SMS) having a basis weight in the range of about 10 gsm to 60 gsm; andwherein each of said swellable absorbent core and two longitudinally-extending composite sections forms a distinct swellable SAP section of said continuous absorbent composite, said continuous absorbent composite being folded between said swellable absorbent core and each said longitudinally extending composite sections to form a substantially non-swellable intersection therebetween. 12. The disposable absorbent article of claim 11, wherein each said intersection is a non-swellable, non-SAP coated band. 13. The article of claim 11, wherein said absorbent layer is supported underneath a section of said topsheet, such that said section of said topsheet provides said nonwoven substrate. 14. The article of claim 11, wherein said absorbent layer is supported on said backsheet, such that a section of said backsheet provides said nonwoven substrate. 15. The article of claim 11, wherein said absorbent layer includes a low cross link SAP adapted to gel block upon wetting such that said backsheet is substantially impervious when wet and said backsheet is breathable when dry. 16. The absorbent article of claim 11, wherein said absorbent composite further includes a concentration of pulp material, said absorbent layer and said nonwoven substrate forming a sheet disposed about said pulp concentration such that said pulp concentration is disposed between at least two layers of said sheet of absorbent layer and nonwoven substrate. 17. In a disposable absorbent article having an absorbent core disposed between a topsheet and a backsheet, a prefabricated absorbent composite comprising:an absorbent layer of hydratable fine fibers in the form of microfibril obtained from cellulose or a derivative thereof, and absorbent polymer (SAP) particles bonded together by said hydratable fibers, anda nonwoven substrate supporting said absorbent layer, said absorbent layer being coated thereupon;wherein said absorbent layer is disposed between said topsheet and said backsheet, and generally centrally in said article at a location identified as a crotch region, said absorbent layer providing an absorbent core for absorbing bodily exudates received by the crotch region; andwherein said article includes a pair of longitudinally-extending, upstanding cuffs spiced laterally from said absorbent core, each cuff having two sheet layers, and wherein said absorbent composite includes two longitudinally-extending composite sections extending upwardly from the crotch region into said cuffs and between said cuf f layers; andwherein said absorbent layer includes a low cross link SAP adapted to gel block upon wetting such the said backsheet is substantially impervious when wet and the backsheet is breathable when dry; andwherein each said longitudinally-extending composite sections and said absorbent core is a distinct swellable section of one continuous absorbent composite structure positioned about the crotch region, said continuous absorbent structure including folds providing an interface between each longitudinally-extending composite section and said absorbent core, each said interface being a non-SAP coated band that restricts swelling therearound. 18. The absorbent composite of claim 17, wherein said absorbent layer is supported underneath a section of said topsheet, such that said section of topsheet provides said nonwoven substrate. 19. The absorbent composite of claim 17, wherein said absorbent layer is supported on a section of said backsheet, such that said backsheet section provides said nonwoven substrate. 20. The absorbent composite of claim 17, wherein said low cross-link SAP is low-gel strength SAP characterized by a free swell capacity greater than about 40 g/g. 21. The absorbent composite of claim 17, wherein said SAP are water-swellable bodies included in a concentration of about 50 gsm to 500 gsm. 22. The absorbent composite of claim 17, further comprising a coating of mineral oil over said SAP particles of said absorbent layer, said coating being adapted to retard the initial receipt of liquid by said SAP in said absorbent layer.