Patent ID: 8080704

Claim:
An absorbent article comprising a topsheet, a backsheet, and an absorbent member between the topsheet and the backsheet and having applied thereon a hot-melt composition that changes color on contact with a body fluid, the hot melt composition comprising (a) 0.1% to 5% by weight of a pH indicator that is substantially colorless at pH 7 and develops a color in an acidic environment, (b) 20% to 90% by weight of a surfactant, (c) 5% to 55% by weight of a polyalkylene glycol, (d) 0% to 70% by weight of a polymer having a carboxyl group, and (e) 0.1% to 5% by weight of an acidic substance other than components (b) and (d): wherein the hot melt composition undergoes color change on being wetted with a body fluid and then returns to its original color before the color change on being dried.