System and method for absorbent core production
View Patent ↗A system, method, and apparatus for preparing an absorbent core for use in absorbent garments is disclosed. The apparatus includes a funnel having a first end and a second end, the second end being narrower in diameter than the first end, and a nozzle having a straight section, a curved section, and a tip. The straight section of the nozzle is operatively associated with the second end of the funnel. The apparatus further includes a diverter plate operatively associated with the curved section of the nozzle. The invention provides a more uniform distribution of super absorbent particles within the fluff pulp used to make the absorbent core, thus improving performance of the absorbent core. An absorbent garment made using an absorbent core made with the apparatus of the invention also is disclosed. The absorbent garment provides better leakage protection than absorbent garments incorporating conventional absorbent cores.
1. An apparatus for dispensing super absorbent particles, comprising:
a funnel having a first end and a second end, the second end being narrower in diameter than the first end;
an adjustable nozzle having a straight section, a curved section, and a tip, wherein the straight section of the nozzle is operatively associated with the second end of the funnel, the diameter of said nozzle being adjustable to provide for changes in the flow rate of super absorbent particles; and
a bent diverter plate operatively associated with the curved section of the nozzle, said diverter plate being bent in the direction of the nozzle at the point of substantial contact between the nozzle tip and the diverter plate.
2. The apparatus of claim 1 , wherein the funnel and nozzle are of unitary construction.
3. The apparatus of claim 1 , wherein the curved section of the nozzle tapers to form the tip.
4. The apparatus of claim 3 , wherein the curve in the curved section of the nozzle is disposed between the straight section of the nozzle and the point in the nozzle wherein the nozzle begins to uniformly decrease in size to form the tip.
5. A system for making an absorbent core, comprising:
a supply of a plurality of fiber sheets;
transport means to transport at least some of the fiber sheets to a fiberizer;
a fiberizer to form fiberized pulp from the fiber sheets;
a gas stream to entrain the fiberized pulp;
a forming chamber with a first end, a midsection, and a second end, wherein the gas stream with the entrained fiberized pulp enters the first end of the forming chamber;
a forming surface located at the second end of the forming chamber, the forming surface comprising a first surface facing the forming chamber, and a second surface facing away from the first surface;
a means for creating a pressure differential between the first surface and the second surface of the forming surface, wherein the pressure on the first surface is higher than the pressure on the second surface; and
an apparatus for introducing super absorbent polymer particles into the midsection of the forming chamber, the apparatus comprising
a funnel having a first end and a second end, the second end being narrower in diameter than the first end;
a nozzle having a straight section, a curved section, and a tip, wherein the straight section of the nozzle is operatively associated with the second end of the funnel; and
a diverter plate operatively associated with the curved section of the nozzle.
6. The system of claim 5 , wherein the forming chamber further comprises an upper surface and a lower surface, such that the forming surface is housed within the upper surface and the lower surface of the forming chamber.
7. The system of claim 5 , wherein the diverter plate extends beyond the tip of the nozzle, and the distance between the point where the diverter plate extends beyond the tip of the nozzle and the forming surface is from about 150 mm to about 205 mm.
8. The system of claim 6 , wherein the tip of the nozzle is from about 140 mm to about 160 mm below the upper surface of the forming chamber.
9. The apparatus of claim 5 , wherein the tip of the nozzle is substantially in contact with the diverter plate.
10. The apparatus of claim 5 , wherein the funnel and nozzle are of unitary construction.
11. The apparatus of claim 5 , wherein the curved section of the nozzle tapers to form the tip.
12. The apparatus of claim 11 , wherein the curve in the curved section of the nozzle is disposed between the straight section of the nozzle and the point in the nozzle wherein the nozzle begins to uniformly decrease in size to form the tip.