Pet sheet
Disclosed is a pet sheet including a backsheet, a liquid-permeable topsheet and an absorbent core disposed between the backsheet and the topsheet for absorption and retention of liquid. The absorbent core is a pulp layer mixed with a first superabsorbent material. A second superabsorbent material is disposed in a spaced pattern between the absorbent core and the topsheet. The first superabsorbent material has a faster liquid absorption rate than the second superabsorbent material.
1 . A pet sheet comprising a backsheet, a liquid-permeable topsheet and an absorbent core disposed between the backsheet and the topsheet for absorption and retention of liquid, wherein
the absorbent core is a pulp layer mixed with a first superabsorbent material and a second superabsorbent material is disposed in a spaced pattern between the absorbent core and the topsheet, wherein the first superabsorbent material has a faster liquid absorption rate than the second superabsorbent material.
2 . A pet sheet according to claim 1 , wherein the second superabsorbent material has a greater liquid absorption capacity under pressure than the first superabsorbent material.
3 . A pet sheet according to claim 1 , wherein the topsheet is a resin film formed with a plurality of apertures for allowing liquid passage.
4 . A pet sheet according to claim 3 , wherein the apertures are tapered toward the absorbent core with peripheral walls projecting from an underside surface of the resin film.
5 . A pet sheet according to claim 1 , wherein a hydrophilic sheet is disposed between the topsheet and the second superabsorbent material.
6 . A pet sheet according to claim 5 , wherein the hydrophilic sheet is a tissue paper.
7 . A pet sheet according to claim 5 , wherein the hydrophilic sheet is a nonwoven fabric.
8 . A pet sheet according to claim 1 , wherein the liquid absorption rate of the first superabsorbent material is at least 5 seconds faster than that of the second superabsorbent material.