Patent ID: 7154019

Claim:
In a body fluid absorbent article comprising: a liquid-pervious sheet; a liquid-impervious sheet; a body fluid absorbent core interposed therebetween; an indicator interposed between said liquid-impervious sheet and said core and comprising a water-absorbent sheet which allows said core in a wet state to be visually perceived from outside said liquid-impervious sheet and indication elements temporarily concealed by said water-absorbent sheet; said water-absorbent sheet comprising a porous thermoplastic film having an inner surface facing said core and an outer surface facing said liquid-impervious sheet; said film having a total luminous transmittance of 40% or lower in a dry state and 60% or higher in a wet state; and said indication elements being held in close contact with said inner surface; wherein said thermoplastic film contains 0.5 to 5 wt % of modifier for hydrophilicity.