Patent ID: 8042490

Claim:
An animal waste collection sheet entirely formed in a planar form, comprising: a top sheet which is at least partially liquid permeable; a back sheet which is liquid impermeable; and an absorbent sheet disposed between the top sheet and the back sheet, wherein the top sheet has a high fiber density region, having a fiber density higher than an average the fiber density in another region of the top sheet; a low fiber density region included in the another region, and a first region having fiber density lower than and average fiber density of the high density region and the low fiber density region, the high fiber density region and the low fiber density region extend along a thickness direction of the top sheet from an upper surface to a back face thereof, respectively; and a bottom of the groove portions has a fiber density no greater than 0.18 g/cm 3 ; the central region of the convex portion has a fiber density in the range of 0.005 to 0.20 g/cm 3 ; and the side edge region of the convex portions has a fiber density in the range of 0.007 to 0.40 g/cm 3 .