Disposable absorbent pants with advantageous stretch and manufacturability features, and methods for manufacturing the same
A disposable absorbent pant that includes a central chassis and a belt structure is disclosed herein.
1. A disposable absorbent pant having a front waist region, a rear waist region, and a crotch region, and comprising:
a central chassis occupying the crotch region and comprising left and right longitudinal edges;
a liquid permeable topsheet;
a backsheet, and an absorbent core disposed between the topsheet and the backsheet;
a front belt structure comprising a front portion having a front waist edge and an opposing proximal front edge, front left and right leg opening edges, and front left and right side edges;
a rear belt structure comprising a rear portion having a rear waist edge and an opposing proximal rear edge, rear left and right leg opening edges, and rear left and right side edges;
wherein the respective front and rear left side edges and the respective front and rear right side edges being joined at side seams forming a waist opening and left and right leg openings, wherein at least one of the front and rear belt structures further comprises:
an inner layer formed of a single inner nonwoven web;
an outer layer formed of an outer nonwoven web;
a first plurality of elastics disposed inboard (closer to the central chassis) of
the inner layer, wherein the first plurality of elastics are leg elastics forming a leg elastic member;
wherein the first plurality of elastics are in direct contact with the single inner nonwoven web of the at least one of the front and rear belt structures;
a second plurality of elastics disposed outboard (further from the central chassis) of the outer layer, wherein the second plurality of elastics are waist elastics forming a waist elastic member;
wherein the second plurality of elastics are sandwiched by a folded over nonwoven layer; and
wherein the first plurality of elastics are disposed between the backsheet and the inner layer, and a wrapping layer locates between the first plurality of elastics and the backsheet, and extends from the front waist edge to the rear waist edge.
2. The pant of claim 1 wherein the waist elastic member of the at least one of the front and rear portions of the belt structure is disposed along and proximate the respective front or rear waist edge.
3. The pant of claim 1 wherein the second plurality of elastics are disposed between a band layer and the outer layer.
4. The pant of claim 1 wherein the waist elastic member and the leg elastic member in either or both the front portion and the rear portion of the front and rear belt structures differ from each other in a respect selected from the group consisting of number of elastic strands or bands, cross-sectional size of elastic strands or bands, cross-sectional shape of elastic strands or bands, chemical composition of material from which elastic strands or bands are formed, amount of pre-strain imparted during manufacture, and combinations thereof.
5. The pant of claim 1 wherein the leg elastic member follows along at least one of the left and right leg openings of at least one of the front and rear belt structures, and wherein the left and right leg openings are arcuate.
6. The pant of claim 1 wherein the folded over nonwoven layer is a portion of at least one of the front and rear belt structures.
7. The pant of claim 1 wherein a first end of the leg elastic member terminates at least one of the left and right side edges.
8. The pant of claim 7 wherein a second end of the leg elastic member terminates in the crotch region.
9. The pant of claim 1 wherein at least two nonwoven layers are between the first and second pluralities of elastics.
10. The pant of claim 1 wherein at least three layers are between the first and second pluralities of elastics.
11. The pant of claim 1 wherein the proximal front edge is spaced from the proximal rear edge.
12. The pant of claim 11 wherein the proximal front and rear edges terminate in the crotch region.
13. The pant of claim 1 wherein at least one of the proximal front and rear edges is coterminous with a proximal edge of the inner layer.
14. The pant of claim 1 wherein the first plurality of elastics is disposed immediately between the wrapping layer and the inner nonwoven layer.
15. The pant of claim 3 wherein the band layer form a portion of a most exterior surface of the pant.
16. The pant of claim 6 wherein the folded over nonwoven layer is at least one of the inner and outer layers.