Absorbent article having improved signal member
View Patent ↗An absorbent article comprises a signal element having a body-facing surface, a garment-facing surface, a longitudinal direction, a transverse direction and a z-direction. The signal element includes a water-soluble polymeric buffering film and a stimulation material. The water-soluble polymeric buffering film comprises a water-soluble base polymer. In some aspects, the stimulation material comprises a temperature change agent, and the signal element exhibits a surface temperature change of at least +/−2° C. In some aspects, the signal element exhibits a stimulation effect over at least two aqueous insults.
1. An absorbent article comprising a signal element;
wherein the signal element has a body-facing surface, a garment-facing surface, a longitudinal direction, a transverse direction and a z-direction;
wherein the signal element comprises a water-soluble polymeric buffering film incorporating a stimulation material, wherein the stimulation material is a cooling agent selected from xylitol, sorbitol or urea and with a heat of solution, hydration, or reaction of −30 to −90 cal/g;
wherein the water-soluble polymeric buffering film comprises a water-soluble base polymer selected from polyethylene oxide, polyethylene glycol or polyvinyl alcohol; and
wherein the signal element exhibits a surface temperature change of at least +/−2° C. from a dry state at 23° C. after being completely submerged for 10 seconds in tap water having a temperature of 23° C.
2. The absorbent article of claim 1 wherein the water-soluble polymeric buffering film further comprises at least one of a plasticizer, a water-solubility control agent or a pH adjustment agent.
3. The absorbent article of claim 1 wherein the stimulation material is present in the signal element at a basis weight of 50 gsm to 2000 gsm.
4. The absorbent article of claim 1 wherein the stimulation material has a solubility of from 0.1 grams to 6 grams of material per gram of water.
5. The absorbent article of claim 1 wherein the signal element exhibits a stimulation effect for at least 5 minutes after a first aqueous insult according to the Aqueous Insult Procedure.
6. The absorbent article of claim 1 wherein the signal element exhibits a stimulation effect during at least two aqueous insults according to the Aqueous Insult Procedure.
7. The absorbent article of claim 1 wherein the signal element does not completely dissolve until between 5 minutes and 30 minutes after being completely submerged in tap water at 23° C.
8. The absorbent article of claim 1 wherein the signal element does not reach a maximum stimulation effect until at least 4 minutes after a first aqueous insult according to the Aqueous Insult Procedure.
9. An absorbent article comprising a signal element;
wherein the signal element has a body-facing surface, a garment-facing surface, a longitudinal direction, a transverse direction and a z-direction;
wherein the signal element comprises a water-soluble polymeric buffering film incorporating a stimulation material, wherein the stimulation material is a cooling agent selected from xylitol, sorbitol or urea and with a heat of solution, hydration, or reaction of −30 to −90 cal/g;
wherein the water-soluble polymeric buffering film comprises a water-soluble base polymer selected from polyethylene oxide, polyethylene glycol or polyvinyl alcohol; and
wherein the signal element exhibits a stimulation effect over at least two aqueous insults according to the Aqueous Insult Procedure.
10. The absorbent article of claim 9 wherein the water-soluble base polymer is selected from polyethylene oxide, polyethylene glycol or polyvinyl alcohol.
11. The absorbent article of claim 9 wherein the water-soluble polymeric buffering film further comprises at least one of a plasticizer, a water-solubility control agent or a pH adjustment agent.
12. The absorbent article of claim 9 wherein the signal element exhibits a stimulation effect for at least 5 minutes after a first aqueous insult according to the Aqueous Insult Procedure.
13. The absorbent article of claim 12 wherein the signal element exhibits a stimulation effect for at least 20 minutes after a first aqueous insult according to the Aqueous Insult Procedure.
14. The absorbent article of claim 9 wherein the signal element does not completely dissolve until between 5 minutes and 30 minutes after being completely submerged in tap water at 23° C.