Vacuum formed film topsheets having a silky tactile impression
View Patent ↗In an absorbent article, a formed film topsheet provides good rewet performance and a silky tactile impression in a stroking direction. The topsheet has a plurality of Boat Shape Cells substantially aligned in the stroking direction at a mesh greater than about 25 cells per linear inch, as measured perpendicular to the stroking direction. The topsheet may have additional features to enhance the silky tactile impression such as microridges on the lands between the cells, raised lands in the stroking direction, and other parameters as described in the specification and claimed in the claims.
1. An absorbent article with a body facing side, an opposite clothing facing side, and a stroking direction, the article comprising:
a topsheet on the body facing side of the article having a body facing surface, wherein the topsheet has a rewet of less than about 1 gram, and wherein the loft to open area ratio of the topsheet is greater than about 9; and
an absorbent core between the topsheet and the clothing facing side of the article;
wherein the topsheet is a film with a plurality of cells that are Boat Shape Cells, each said cell being defined by sidewalls that extend from the body facing surface toward the absorbent core, the cells defining lands on the body facing surface between the cells, said cells having a Boat Shape at the body facing surface and a major axis and a minor axis at the body facing surface, the ratio of the major axes to the minor axes of substantially all of said cells being between about 1.5:1 and about 6.5:1 as measured at the body facing surface, said major axes being substantially aligned in the stroking direction of the film and the cells having a mesh greater than 25 cells per linear inch as measured at a right angle to the stroking direction, and wherein the film has a Silky Tactile Impression Rating of less than about 4.
2. The absorbent article of claim 1 wherein the boat Shape Cells have rounded sides.
3. The absorbent article of claim 1 wherein the Boat Shape Cells have straight sides.
4. The absorbent article of claim 1 wherein the topsheet has a mesh count of approximately 40 cells per linear inch as measured at a right angle to the stroking direction.
5. The absorbent article of claim 1 wherein the ratio of a plurality of the major axes to the minor axes is between about 1.75:1 and about 4.5:1.
6. The absorbent article of claim 1 wherein the cells of the topsheet are aligned in a commonly aligned pattern.
7. The absorbent article of claim 1 wherein a plurality of the lands on the topsheet are aligned in the stroking direction anti raised above the remaining lands by between about 15 μm and about 65 μm.
8. The absorbent article of claim 1 wherein the cells of the topsheet are aligned in a staggered pattern.
9. The absorbent article of claim 1 further comprising microridges on the lands of the topsheet, each microridge having a length and a width.
10. The absorbent article of claim 9 wherein:
the microridges have a center to center spacing of about 50 μm to about 150 μm and a height of about 5 μm to about 75 μm; and
a plurality of said microridges each have its length greater than its width and said plurality of microridges being substantially parallel along their lengths.
11. The absorbent article of claim 1 wherein:
the topsheet has a rewet of less than about 1 gram;
the topsheet has a mesh count of approximately 40 cells per linear inch as measured at a right angle to the stroking direction; and
the ratio of a plurality of the major axes to the minor axes is between about 1.75:1 and about 4.5:1.
12. The absorbent article of claim 1 wherein:
the topsheet has a mesh count of approximately 40 cells per linear inch as measured at a right angle to the stroking direction;
the ratio of a plurality of the major axes to the minor axes is between about 1.75:1 and about 4.5:1; and
a plurality of the hands on the topsheet are aligned in the stroking direction and raised above the remaining lands by between about 15 μm and about 65 μm.
13. The absorbent article of claim 9 wherein:
a plurality of the lands on the topsheet am aligned in the stroking direction and raised above the remaining lands by between about 15 μm and about 65 μm; and
the loft to open area ratio of the topsheet is greater than about 9.
14. The absorbent article of claim 1 wherein:
the topsheet has a rewet of less than about 1 gram;
the ratio of a plurality of the major axes to the minor axes is between about 1.75:1 and about 4.5:1; and
the loft to open area ratio of the topsheet is greater than about 9.
15. The absorbent article of claim 1 wherein:
the cells of the topsheet are aligned in a commonly aligned pattern;
a plurality of the lands on the topsheet are aligned in the stroking direction and raised above the remaining lands by between about 15 μm and about 65 μm; and
the loft to open area ratio of the topsheet is greater than about 9.