Extensible absorbent layer and absorbent article
View Patent ↗The present invention provides a method of preparing an absorbent layer from an absorbent nonwoven web having a first plurality of slits with a first orientation and a second plurality of slits with a second orientation, wherein the first orientation is different from the second orientation. The first plurality of slits and the second plurality of slits are at least partially through the absorbent nonwoven web, and the second plurality of slits at least partially intersects the first plurality to form apertures in the absorbent nonwoven web.
1. A process for preparing an aperture web, said process comprising:
a) providing a web of a material comprising a top layer, a backing layer, and an absorbent layer positioned between the top layer and the backing layer, wherein said absorbent layer comprises an absorbent nonwoven web;
b) providing a slitting apparatus comprising an anvil roll, a first cutting roll and a second cutting roll, wherein the first cutting and second cutting rolls are in communication with the anvil roll;
c) passing the web between the first cutting roll and the anvil to form a first plurality of slits in the web; and
d) passing the web between the second cutting roll and the anvil to form a second plurality of slits in the web, wherein at least one slit in the second plurality of slits intersects at least one slit from the first plurality of slits such that the area of the web between the intersecting slits is cut free from the web, thereby forming at least one aperture in the web, the aperture having an effective length in longitudinal direction in the range between about 2 mm and about 20 mm and an effective width in lateral direction in the range between about 0.5 mm and about 10 mm, wherein the absorbent nonwoven web is removed at the at least one aperture.
2. The process according to claim 1 , wherein the first cutting roll has a series of protrusions which are non-linear and the first plurality of slits are non-linear.
3. The process according to claim 2 , wherein the second cutting roll has a series of protrusions which are non-linear and the second plurality of slits are non-linear.
4. The process according to claim 1 , wherein the first cutting roll and the second cutting roll are driven in unison with the anvil roll.
5. The process according to claim 1 , further comprising providing at least one additional cutting roll which is in communication with the anvil roll and passing the web between the at least one additional cutting roll and the anvil roll.