Patent ID: 8871994
Filing Date: 2014-10-28
Classification: A61F,A61L

Abstract:
1. An absorbent article comprising: a substantially liquid impermeable layer; a liquid permeable layer; an absorbent core positioned between the substantially liquid impermeable layer and the liquid permeable layer; and a wetness sensor integrated into the article and positioned such that the sensor is in fluid communication with a bodily fluid from a wearer of the article, wherein the wetness sensor includes an ink comprising a proton-accepting chromogen and a proton-donating agent, wherein the proton-donating agent includes an aliphatic carboxylic acid, the weight ratio of the proton-donating agent to the proton-accepting chromogen being from about 0.4 to about 10, wherein the ink undergoes a visible color change upon contact with the bodily fluid, further wherein the ink is free of wetting agents.