Stretch breathable protective absorbent article using bilaminate
A disposable absorbent article of a brief or pull-up type incorporates a breathable laminate material composed of two layers. The laminate is an elastic material and may include non-elastic portions created by deactivating the material. The laminate material may be made breathable by the ultrasonic bonding process used to create the laminate. A third layer is adhered or bonded to the laminate and with leg elastics positioned between the laminate that the third layer. The absorbent article includes an absorbent assembly that overlaps with the non-elastic portions of the laminate.
1. An absorbent article, comprising:
a front laminate section defining a front end edge, a front crotch edge parallel to and longitudinally spaced from the front end edge, and first and second transversely opposed side edges extending in a longitudinal direction, the front laminate section comprising a front non-elastic portion adjacent to the front crotch edge,
a front elastic portion adjacent to the front end edge, the front laminate section further comprising:
a non-breathable polymeric film,
a first nonwoven layer,
a plurality of spaced apart bonding sites attaching the first nonwoven layer to a first side of the polymeric film,
a plurality of breathable apertures through the polymeric film, and
a second nonwoven layer attached to a second side of the polymeric film opposite the first nonwoven layer, wherein the second nonwoven layer is attached to the polymeric film by a first adherence mechanism in a first zone and a second adherence mechanism, different from the first adherence mechanism, in a second zone;
a rear laminate section defining rear end edge, a rear crotch edge parallel to and longitudinally spaced from the rear end edge, and first and second transversely opposed side edges extending in a longitudinal direction; and
an absorbent assembly extending longitudinally between the front crotch edge and the rear crotch edge, the absorbent assembly comprising an absorbent core.
2. The absorbent article of claim 1 wherein the absorbent assembly overlaps with the front non-elastic portion and does not overlap with the front elastic portion.
3. The absorbent article of claim 1 wherein the front laminate section further defines a first leg edge, and the absorbent article further comprises:
a first leg elastic that is adhered to a surface of the front laminate section and extends parallel and adjacent to the leg edge from the side edge to an edge of the front non-elastic portion;
and a second leg elastic that is adhered to a surface of the front laminate section and that is increasingly separated in distance from first leg elastic as the leg elastics extend from the side edge to an edge of the front non-elastic portion.
4. The absorbent article of claim 3 wherein the first leg elastic and the second leg elastic are positioned between the polymeric film and the second nonwoven layer.
5. The absorbent article of claim 1 wherein the polymeric film is an elastomeric film.
6. The absorbent article of claim 5 wherein the non-elastic portion of the front laminate is formed by deactivating a portion of the elastomeric film.
7. The absorbent article of claim 1 wherein the bonding sites are ultrasonic bonds.
8. The absorbent article of claim 7 , wherein the plurality of breathable apertures consists of a series of through passages that provide for the passage of water vapor through the front laminate.
9. The absorbent article of claim 8 , wherein each through passage is formed in conjunction with one of the plurality of ultrasonic bonding sites.
10. The absorbent article of claim 9 wherein the through passages are formed within a perimeter of the ultrasonic bonding site.
11. The absorbent article of claim 9 wherein the through passages are tears formed in the polymeric film with each tear being outside of and adjacent to a perimeter of the ultrasonic bonding site.
12. The absorbent article of claim 1 wherein the first adherence mechanism comprises a plurality of spaced apart bonding sites.
13. The absorbent article of claim 12 wherein the bonding sites are ultrasonic bonds.
14. The absorbent article of claim 1 wherein the second adherence mechanism comprises an adhesive material.
15. The absorbent article of claim 14 wherein the leg elastics are positioned within the second zone.
16. An absorbent article, comprising:
a front laminate section defining front end edge, a front crotch edge parallel to and longitudinally spaced from the front end edge, first and second transversely opposed side edges extending in a longitudinal direction, and first and second leg edges, the front laminate section comprising:
a non-breathable polymeric film,
a first nonwoven layer attached to a first side of the polymeric film at a plurality of spaced apart bonding sites,
a second nonwoven layer attached to a second side of the polymeric film opposite the first nonwoven layer, wherein the second nonwoven layer is attached to the polymeric film by a first adherence mechanism in a first zone and a second adherence mechanism, different from the first adherence mechanism, in a second zone,
a front non-elastic portion adjacent to the front crotch edge, and
a front elastic portion adjacent to the front end edge, and
a plurality of breathable apertures through the polymeric film;
a rear laminate section defining rear end edge, a rear crotch edge parallel to and longitudinally spaced from the rear end edge, first and second transversely opposed side edges extending in a longitudinal direction, and first and second leg edges, the rear laminate section comprising a rear non-elastic portion adjacent to the rear crotch edge and a rear elastic portion adjacent to the rear end edge; and
an absorbent assembly extending longitudinally between the front crotch edge and the rear crotch edge, the absorbent assembly comprising a topsheet, a back sheet and an absorbent core positioned between the topsheet and backsheet.
17. The absorbent article of claim 16 wherein the plurality of breathable apertures consists of a series of through passages that provide for the passage of water vapor through the front laminate with each through passage being formed in conjunction with one of the plurality of bonding sites.
18. The absorbent article of claim 17 wherein the through passages are formed within a perimeter of the bonding site.
19. The absorbent article of claim 17 wherein the through passages are tears formed in the polymeric film with each tear being outside of and adjacent to a perimeter of the ultrasonic bonding site.
20. The absorbent article of claim 16 wherein the front laminate section further comprising:
a first leg elastic adhered to a surface of the front laminate section, wherein the first leg elastic extends parallel and adjacent to the first leg edge from the first transversely opposed side edge to an edge of the front non-elastic portion;
and a second leg elastic adhered to a surface of the front laminate section, wherein the second leg elastic is increasingly separated in distance from first leg elastic as the leg elastics extend from the side edge to an edge of the front non-elastic portion.