Absorbent article including superabsorbent yarn
View Patent ↗The present invention discloses and claims an absorbent article which utilizes an absorbent portion that includes superabsorbent yarn as part of the absorbent portion, such that liquid is wicked to the perimeter or select regions of the absorbent portion, or the perimeter of the absorbent article itself, taking full advantage of either the depth, width, length or combination of dimensions of the absorbent portion, or absorbent article. The superabsorbent yarn can be one or more of several types, including encapsulated yarn, multilayered encapsulated yarn, coated yarn and sliver-formed yarn as long as such yarn includes at least two components, those being a superabsorbent polymer and a second material which promotes distribution of liquid along the yarn length. In alternatives of the invention, such absorbent article utilizing the superabsorbent yarn provides passive visual signals to consumers, of article saturation levels prior to leakage.
1. An absorbent article having a longitudinal and transverse direction, and comprising a fluid permeable topsheet having an inside surface, a fluid impermeable backsheet having an inside surface, an absorbent portion positioned between said topsheet and said backsheet, characterized in that said absorbent portion is comprised of at least free strand superabsorbent yarn affixed to a carrier sheet, which carrier sheet is adjacent said fluid impermeable backsheet and bonded either to said topsheet inside surface or said backsheet inside surface, said free strand superabsorbent yarn including superabsorbent and fluid permeable components said fluid permeable components for either distributing fluid within said yarn length or alternatively for retaining fluid, wherein said free strand superabsorbent yarn is encapsulated superabsorbent yarn.
2. The absorbent article of claim 1 , wherein said free strand super absorbent yarn is a multi-layered encapsulated superabsorbent yarn.
3. The absorbent article of claim 1 , wherein said absorbent portion further comprises an additional absorbent layer.
4. The absorbent article of claim 1 , wherein said article further includes a shaping layer.
5. The absorbent article of claim 1 , wherein said article includes an additional layer between said topsheet and said absorbent portion.
6. The absorbent article of claim 5 , wherein said additional layer defines one or more openings through which said free strand superabsorbent yarn is visible through said topsheet.
7. The absorbent article of claim 1 , wherein said topsheet is translucent to allow the viewing of said free strand superabsorbent yarn through said topsheet.
8. The absorbent article of claim 1 , wherein said absorbent article is selected from the group consisting of a feminine hygiene article, an adult incontinence article, a baby or child care article, a bandage, and a wiping towel.
9. The absorbent article of claim 8 , wherein superabsorbent yarn is arranged on said article in a location separate from said absorbent portion.
10. The absorbent article of claim 8 , wherein said free strand superabsorbent yarn is severed into multiple pieces along at least one direction of said article.
11. The absorbent article of claim 1 , wherein said article includes peripheral edges and further, wherein said free strand superabsorbent yarn is arranged along the article's peripheral edges.
12. The absorbent article of claim 1 , wherein said free strand superabsorbent yarn is arranged adjacent other strand materials.
13. The absorbent article of claim 1 , wherein said free strand superabsorbent yarn is arranged such that said absorbent portion includes different strand densities of free strand superabsorbent yarn per unit area, along said absorbent portion.