Apertured tissue products
View Patent ↗The fluid intake rate of a tissue product having at least one hydrophobic exterior layer can be increased significantly by the addition of apertures through the hydrophobic exterior layer to the tissue product's hydrophilic interior layer. The apertures allow for fluid to be absorbed by the hydrophilic interior layer, while leaving the hydrophobic exterior layer dry to the touch. The size, number and spacing of the apertures can be controlled to manage the absorbent properties of the tissue product. In one embodiment, a three-ply tissue product has two exterior hydrophobic plies each having a plurality of apertures extending from the surface of both exterior plies through the plies to a hydrophilic interior ply.
1. A tissue product comprising one or more plies, wherein each ply within the tissue product is a tissue ply having from about 80 to about 100 percent cellulose fibers, said tissue product further comprising:
an upper hydrophobic exterior layer having an upper exterior surface;
a hydrophilic interior layer;
a plurality of apertures extending from the upper exterior surface in fluid communication with the hydrophilic interior layer;
a lower hydrophobic exterior layer having a lower exterior surface; and
a plurality of apertures extending from the lower exterior surface in fluid communication with the hydrophilic interior layer.
2. The tissue product of claim 1 wherein the tissue product comprises a single ply having multiple layers.
3. The tissue product of claim 1 wherein the tissue product comprises more than one ply.
4. The tissue product of claim 3 wherein the upper hydrophobic exterior layer, the hydrophilic interior layer, and the lower hydrophobic exterior layer comprise an entire thickness of a ply of tissue.
5. The tissue product of claim 4 wherein the apertures extend completely through the upper and lower hydrophobic exterior layers.
6. The tissue product of claim 3 wherein the upper hydrophobic exterior layer, the hydrophilic interior layer, and the lower hydrophobic exterior layer comprise one or more layers of a ply of tissue.
7. The tissue product of claim 3 further comprising:
a hydrophobic interior layer; and
a plurality of apertures located in the hydrophobic interior layer extending at least through the hydrophobic interior layer.
8. The tissue product of claim 3 wherein the apertures contain hydrophilic fibers pulled through the apertures from the hydrophilic interior layer.
9. The tissue product of claim 2 or 3 wherein the apertures have a frequency and the frequency is between about 3 to about 800 apertures per lineal inch.
10. The tissue product of claim 2 or 3 wherein the apertures have an area and the area is between about 0.0001 mm 2 to about 8 mm 2 .
11. The tissue product of claim 2 or 3 wherein the apertures are tapered, and the size of the apertures is greater at the exterior surfaces than the size of the apertures near the hydrophilic layer.
12. The tissue product of claim 2 or 3 wherein a total caliper of the tissue product is about 600 microns or less.
13. The tissue product of claim 2 or 3 having a Hercules Size Test value of about 10 seconds to about 300 seconds and a Water Drop Time of about 0 seconds to about 10 seconds.
14. The tissue product of claim 2 or 3 having a Hercules Size Test value of about 25 seconds to about 300 seconds and a Water Drop Time of about 0 seconds to about 7 seconds.
15. The tissue product of claim 2 or 3 having a Hercules Size Test value of about 10 seconds to about 300 seconds and an Automatic Gravimetric Absorbency Test value of about 0.7 seconds to about 5 seconds.
16. The tissue product of claim 2 or 3 wherein a Wet Through Time for the tissue is between about 20 seconds to about 60 seconds, a Water Drop Time is between about 0 seconds to about 10 seconds, and a Wet Out Area is about 3 square inches or greater.
17. The tissue product of claim 1 wherein the apertures in the upper exterior surface are offset relative to the apertures in the lower exterior surface.
18. The tissue product of claim 1 wherein the upper hydrophobic exterior layer comprises a polysiloxane.
19. The tissue product of claim 1 wherein both the upper and lower hydrophobic exterior layers comprise a polysiloxane.
20. The tissue product of claim 18 or 19 wherein the polysiloxane comprises an amino functional polysiloxane.
21. The tissue product of claim 18 or 19 wherein the polysiloxane comprises an amount between about 0.3 percent to about 4 percent by weight of the total dry fiber in the product.
22. The tissue product of claim 1 comprising a basis weight for each layer and the basis weight of the hydrophilic interior layer is greater than the basis weight of the upper and lower hydrophobic exterior layers.
23. The tissue product of claim 22 wherein the basis weight of the hydrophilic interior layer is about 25 percent to about 300 percent greater than that of outer hydrophobic layers or plies.
24. The tissue product of claim 1 comprising a tensile strength and the tensile strength is between about 300 g/3″ to about 3,000 gram/3″.