Diaper with separator sheet
Diapers, including infant diapers, training pants, and adult incontinence articles, and the like having a transverse separator sheet for excrement separation and/or isolation away from the skin with a specific design of attachment of the transverse separator sheet to the topsheet and to the elastic cuffs of the diapers.
1. An infant or adult diaper having a longitudinal centerline and a lateral centerline perpendicular to the longitudinal centerline, wherein the diaper comprises a topsheet and a backsheet and positioned therein between an absorbent core, first and second longitudinally extending opposing elastic cuffs on either longitudinal side of the topsheet, the diaper having a crotch region, positioned in between a front region and a back region, wherein the diaper comprises a transverse separator sheet made of a separator sheet material, the transverse separator sheet having a transversely extending top edge and top edge portion and an opposing transversely extending bottom edge and a bottom edge portion, wherein
parts of the top edge portion are attached to the cuffs in the crotch region or front region to form a first cuff attachment area and a second opposing cuff attachment area, each cuff attachment area having an inner edge towards the longitudinal centerline of the diaper; and
the bottom edge portion is attached to the topsheet at one or more topsheet attachment areas, and
wherein the first cuff attachment area has a first projected bond length as measured according to the projected bond measurement test method and the second cuff attachment area has a second projected bond length as measured according to the projected bond measurement test method wherein the average of the first and second projected bond lengths is from 1% to 20% of the longitudinal dimension of the crotch region of the diaper, in a flat state of the diaper.
2. The diaper according to claim 1 , wherein each of the first and second elastic cuffs has a longitudinally extending distal edge, and a minimum transverse dimension between either of the longitudinally extending distal edges of a cuff and an inner edge of the a cuff attachment area thereon is 0 to 15 mm.
3. The diaper according to claim 1 , wherein the first and second cuff attachment areas are mirror images of one another about the longitudinal centerline of the diaper, in flat state of the diaper.
4. The diaper according to claim 1 , wherein the inner edge of either of first and second cuff attachment areas forms an angle α of more than 0° with the longitudinal centerline of the diaper, in the flat state of the diaper.
5. The diaper according to claim 1 , wherein the first and second cuff attachment areas have a rectangular shape.
6. The diaper according to claim 1 , wherein each of the one or more topsheet attachment areas has a maximum longitudinal dimension of from 1% to 10% of the longitudinal dimension of the crotch region of the diaper.
7. The diaper according to claim 1 , wherein a bonding pattern density of at least one of the topsheet attachment area(s) is more than 20%.
8. The diaper according to claim 1 , wherein the topsheet is an apertured topsheet, wherein each of the one or more topsheet attachment areas comprises one or more individual bonds, wherein:
a. at least one of the topsheet attachment areas has a bonding pattern density which is higher than the percentage open area of the topsheet measured according to the topsheet effective aperture size and percentage open area measurement test method; or
b. at least one individual bond in at least one of the topsheet attachment areas has a bigger size than at least one of the effective apertures of the topsheet; or
c. the bonding pattern of at least one of the topsheet attachment areas does not overlap with the effective aperture pattern of the topsheet.
9. The diaper according to claim 1 , wherein the one or more topsheet attachment areas comprise one central topsheet attachment area and two side topsheet attachment areas on either side of the central topsheet attachment area.
10. The diaper according to claim 1 , wherein the maximum transverse dimension of the one or more topsheet attachment areas is centered about the longitudinal centerline of the diaper, in flat state of the diaper.
11. The diaper according to claim 1 , wherein each of the first and second elastic cuffs has a longitudinally extending distal edge and a maximum transverse dimension of the one or more topsheet attachment areas is disposed within the minimum transverse dimension between the longitudinally extending distal edges of the first and second elastic cuffs, in flat state of the diaper.
12. The diaper according to claim 11 , wherein the maximum transverse dimension of the one or more topsheet attachment areas is 50% to 98% of the minimum transverse dimension between the longitudinally extending distal edges of the first and second elastic cuffs, in flat state of the diaper.
13. The diaper according to claim 1 , wherein the transverse separator sheet is elastically extensible in the transverse direction to a strain of at least 0.8, as measured according to the in-process two-cycle hysteresis test.
14. The diaper according to claim 1 , wherein the separator sheet material comprises an elastic film, a nonwoven sheet material, a laminate of an elastic film and a nonwoven sheet material, or comprises one or more elastic bands or strands.