Patent ID: 8101815
Filing Date: 2012-01-24
Classification: A01K

Abstract:
1. A pet waste absorption sheet comprising a liquid-impermeable backsheet, a liquid-permeable topsheet having a hydrophilic outer surface, and an absorbent core disposed between the backsheet and the topsheet, the top sheet being a resin film formed with a plurality of apertures for passage of liquid, the topsheet being bonded to the absorbent core through a hot-melt type adhesive, the hot-melt type adhesive being applied in a plurality of continuous lines including curved portions, wherein liquid passage areas defined between the curved portions of the continuous lines and tangent lines defining a lateral extent of the continuous lines have larger average areas than liquid passage areas defined by the apertures, wherein the continuous lines are wavy lines and each continuous wavy line has a continuous pattern of connected Ω-shapes which Ω-shapes can overlap one another, but are otherwise each formed by non-overlapping portions of the continuous lines, and wherein the liquid passage areas defined by the continuous lines are arranged at a pitch in an extension direction of the continuous lines that is larger than a pitch of the apertures in an extension direction, and are further arranged at a pitch in a direction perpendicular to the extension direction that is larger than a pitch of the apertures in the direction perpendicular to the extension direction.