Granted Patent B2

US 12,622,817 · App. 18/256,523 · Granted May 12, 2026

Inventors: Oscar Lipschutz (Gothenburg, SE); Louise Eliasson (Gothenburg, SE); Sofia Ekstedt (Gothenburg, SE); Josefin Sohl (Gothenburg, SE)

Assignee: ESSITY HYGIENE AND HEALTH AKTIEBOLAG

A61F13/4704A61F13/4756A61F13/5616A61F2013/4708

Abstract

Claims (83)

1 . A disposable hygiene article having a transverse direction, a longitudinal direction and a longitudinal centre line dividing the article into left-hand and right-hand portions,

wherein said article has a front portion, a crotch portion and a rear portion, and said article comprises a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorbent core arranged between the topsheet and the backsheet,

wherein the topsheet and the backsheet extend beyond the absorbent core to provide an outer boundary region of the article that surrounds the absorbent core,

wherein an outer contour of the absorbent core is defined by mutually symmetrical mirror-imaged portions arranged symmetrically about the longitudinal centre line, and defined by left and right core edge lines, the core extending between a core front edge in the front portion and a core rear edge in the rear portion,

wherein the core comprises a neck region at which a transverse width between the left and right core edge lines is smaller than a transverse width of the core forward of the neck region and a transverse width rearward of the neck region,

wherein the portion of the core forward of the neck region is defined as a head region of the core and the portion of the core rearward of the neck is defined as the body portion,

wherein the article further comprises at least one asymmetrical wing as seen along any transverse axis of the disposable hygiene article, the asymmetrical wing comprising an outer edge extending in an outward direction from the outer periphery of the disposable hygiene article,

wherein the at least one asymmetrical wing outer edge meets the outer periphery of the disposable hygiene article at front and rear wing junctions connected via a wing junction line J w ,

wherein the outer edge of said at least one asymmetrical wing comprises a front wing distance point Df and a rear wing distance point D r ,

wherein the front wing distance point D r is being spaced from the junction line Jw in an outboard transverse direction by a transverse distance J 1 of 3 mm,

wherein the core further comprises a first front conforming line and a second front conforming line, the first front conforming line being arranged symmetrically with the second front conforming line with respect to a longitudinal or a transverse axis,

wherein the first front conforming line is a straight line that extends from an outer free end located on or adjacent to the left core edge line towards an inner end located on or adjacent to the longitudinal centre line along a first diagonal axis CL 1 extending in the plane of the disposable hygiene article,

wherein the second front conforming line is a straight line that extends from an outer free end located on or adjacent to the left or right core edge line towards an inner end located on adjacent to the longitudinal centre line along a second diagonal axis CL 2 extending in the plane of the disposable hygiene article, the first and the second diagonal axis converging at a convergence point C,

wherein the outer free end of the first front conforming line is closer to the left core edge line than the longitudinal centre line, and the outer free end of the second front conforming line is closer to the right core edge line than the longitudinal centre line,

wherein the first front conforming line and the second front conforming line are disposed rearward of the neck region,

wherein the first and second front conforming lines having a smallest transverse distance S therebetween at their closest approach, and

wherein the transverse distance S is greater than 0 mm.

2 . The disposable hygiene article according to claim 1 , wherein a first longitudinal distance D c between the front wing distance point D f of said at least one asymmetrical wing and the convergence point C, as measured along the longitudinal centerline, is between 5-30 mm.

3 . The disposable hygiene article according to claim 1 , wherein said wing junction line J w corresponding to the wing length is between 50-110 mm.

4 . The disposable hygiene article according to claim 1 , wherein the width M between the left and right core edge lines in the neck region is between 30-60 mm.

5 . The disposable hygiene article according to claim 1 , wherein a front wing junction width W fwj between the left and the right front wing junctions, as seen in the transverse direction T, is between 75-95 mm.

6 . The disposable hygiene article according to claim 1 , wherein a rear wing junction width W rwj between the left and the right rear wing junctions, as seen in the transverse direction T, is between 85-95 mm.

7 . The disposable hygiene article according to claim 1 , wherein said second front conforming line extends from an outer end located on or adjacent to the right core edge line towards an inner end located on or adjacent to the longitudinal center line.

8 . The disposable hygiene article according to claim 7 ,

wherein the first and second front conforming lines form at least a first front V having two arms extending from outer free ends located on or adjacent to the left and right core edge lines towards inner ends located on or adjacent to the longitudinal centerline, said inner ends separated by the distance S=0 at the closest approach V tip1 , and

wherein the closest approach V tip1 is positioned forward of the outer free ends of the arms.

9 . The disposable hygiene article according to claim 8 , wherein said closest approach V tip1 of said inner ends of said first front V, and said closest approach V tip2 of said inner ends of said second front V coincide.

10 . The disposable hygiene article according to claim 1 , said core further comprising a first and a second rear conforming line.

11 . The disposable hygiene article according to claim 10 ,

wherein the first and second rear conforming lines form a rear V having two arms extending from outer free ends located on or adjacent to the left and right core edge lines towards inner ends located on or adjacent to the longitudinal centerline A, separated by the distance S≥0 at the closest approach, and

wherein the closest approach is positioned rearward of the outer free ends of the arms.

12 . The disposable hygiene article according to claim 1 ,

wherein said core further comprises a third and a fourth front conforming lines forming a second front V having two arms extending from outer free ends located on or adjacent to the left and right core edge lines towards inner ends located on or adjacent to the longitudinal centerline A, separated by the distance S=0 at the closest approach V tip2 , and

wherein the closest approach V tip2 is positioned rearward of the outer free ends of the arms.

13 . The disposable hygiene article according to claim 12 , where a distance D v between the tip of the first front V V tip1 and the tip of the second front V V tip2 is between 0-10 mm.

14 . The disposable hygiene article according to claim 1 , wherein said second front conforming line extends from an outer end located on or adjacent to the left core edge line towards an inner end located on or adjacent to the longitudinal center line.

15 . The disposable hygiene article according to claim 1 , wherein said first and second front conforming lines are either a groove or a channel with a depth corresponding to 25% or more of a no-load thickness of the absorbent core, such as from 25% to 100% of the no-load thickness of the absorbent core, or a low density region in which the low density region has a density corresponding to 50% or less of the density of the absorbent core, the no-load thickness or the density of the absorbent core being measured in an area of the absorbent core being adjacent to first or second conforming line.

16 . The disposable hygiene article according to claim 1 ,

wherein said at least one asymmetrical wing is formed with an outer edge comprising a wing positioning profile coinciding with a section of the outer edge, and

wherein the wing positioning profile is formed from a wave having a baseline X wp and a longitudinal axis Y wp perpendicular to the baseline X wp , said wave starting from the front wing junction and extending outwards, the wave consisting of a concave curve having a trough and a convex curve having a peak, the wing positioning profile ending at a wing positioning profile end point where said wave no longer coincides with said outer edge.

17 . The disposable hygiene article according to claim 16 , wherein the peak of the convex curve is located forward of the through of the concave curve as seen in the longitudinal direction y.

18 . The disposable hygiene article according to claim 16 , wherein the baseline X wp of the wave is placed perpendicular on the longitudinal centerline A of the disposable hygiene article.

19 . The disposable hygiene article according to claim 16 , wherein a distance W 2 between the front wing distance point D fr and the peak of the convex curve of the wing positioning profile, as measured along the baseline X wp , is between 8-30 mm.

20 . The disposable hygiene article according to claim 16 , wherein a distance W 1 between the front wing distance point D fr and the wing positioning profile end point, as measured along the baseline X wp , is between 13-35 mm.

21 . The disposable hygiene article according to claim 16 , wherein a height H between the through of concave curve and the peak of the convex curve of the wave, as measured along the longitudinal axis Y wp of said wave, is between 1-5 mm.

22 . The disposable hygiene article according to claim 16 ,

wherein the outer edge of said wing further comprises a rounded section formed with an arc of a circle and coinciding with the rounded section and having a defined radius r, said rounded section extending between a first point of the outer edge and a second point along said outer edge where said arc no longer coincides with said outer edge, and

wherein said radius r is within the interval of 40-500 mm.

23 . The disposable hygiene article according to claim 16 , wherein the outer edge of said wing further comprises two or more rounded sections formed with an arc of a circle and coinciding with the rounded section, each of said first and second arcs having a defined first and second radius, said first radius being within the interval of 40-500 mm and said second radius being within the interval of 40-500 mm.

24 . The disposable hygiene article according to claim 16 , wherein said outer edge includes at least one straight section.

25 . The disposable hygiene article according to claim 16 ,

wherein said wing defines a lower straight line along a lower edge section, and

wherein the lower straight line defines an angle with respect to a transverse axis X 1 perpendicular to the longitudinal centerline A, the magnitude of the angle being between 30-60 degrees.

26 . The disposable hygiene article according to claim 16 ,

wherein said wing defines a lower straight line along a lower edge section, and

wherein the lower straight line defines an angle with respect to a transverse axis X 1 perpendicular to the longitudinal centerline, the magnitude of the angle being between 5-30 degrees.

27 . The disposable hygiene article according to claim 1 ,

wherein said disposable hygiene article comprises a second asymmetrical wing as seen along any transverse axis of the disposably hygiene article, and

wherein the first and the second asymmetrical wing are asymmetrical with respect to each other as seen along the longitudinal centerline.

28 . The disposable hygiene article according to claim 1 , wherein the outer free end of the first front conforming line is located adjacent to the left outer edge core edge line with a gap therebetween, and the outer free end of the second front conforming line is adjacent to the right core edge line with a gap therebetween.

29 . A disposable hygiene article having a transverse direction, a longitudinal direction and a longitudinal centre line dividing the article into left-hand and right-hand portions,

wherein said article has a front portion, a crotch portion and a rear portion, and said article comprises a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorbent core arranged between the topsheet and the backsheet,

wherein the topsheet and the backsheet extend beyond the absorbent core to provide an outer boundary region of the article that surrounds the absorbent core,

wherein an outer contour of the absorbent core is defined by mutually symmetrical mirror-imaged portions arranged symmetrically about the longitudinal centre line, and defined by left and right core edge lines, the core extending between a core front edge in the front portion and a core rear edge in the rear portion,

wherein the core comprises a neck region at which a transverse width between the left and right core edge lines is smaller than a transverse width of the core forward of the neck region and a transverse width rearward of the neck region,

wherein the portion of the core forward of the neck region is defined as a head region of the core and the portion of the core rearward of the neck is defined as the body portion,

wherein the article further comprises at least one asymmetrical wing as seen along any transverse axis of the disposable hygiene article, the asymmetrical wing comprising an outer edge extending in an outward direction from the outer periphery of the disposable hygiene article,

wherein the at least one asymmetrical wing outer edge meets the outer periphery of the disposable hygiene article at front and rear wing junctions connected via a wing junction line J w ,

wherein the outer edge of said at least one asymmetrical wing comprises a front wing distance point D f and a rear wing distance point D r ,

wherein the front wing distance point D f is being spaced from the junction line J w in an outboard transverse direction by a transverse distance J 1 of 3 mm,

wherein the core further comprises a first front conforming line and a second front conforming line, the first front conforming line being arranged symmetrically with the second front conforming line with respect to a longitudinal or a transverse axis,

wherein the first front conforming line extends from an outer free end located on or adjacent to the left core edge line towards an inner end located on or adjacent to the longitudinal centre line along a first diagonal axis CL 1 extending in the plane of the disposable hygiene article,

wherein the second front conforming line extends from an outer free end located on or adjacent to the left or right core edge line towards an inner end located on adjacent to the longitudinal centre line along a second diagonal axis CL 2 extending in the plane of the disposable hygiene article, the first and the second diagonal axis converging at a convergence point C,

wherein the first and second front conforming lines having a smallest transverse distance S therebetween at their closest approach,

wherein the transverse distance S is greater than 0 mm,

wherein said core comprises a first region comprising a head part and two leg portions extending symmetrically about the centre line in a longitudinal direction of the article, and

wherein said absorbent core further comprises a second region at least partially surrounded by said first region, and

wherein the second region has an average density which is at least 20% lower than the average density of the first region.

30 . The disposable hygiene article according to claim 29 ,

wherein the two leg portions start and diverge from a common leg portion start point in the crotch portion and extend over a portion of the crotch portion towards separate leg portion endings in the rear portion,

wherein the second region extends between said leg portions in the transverse and longitudinal direction from the leg portion start point to an endpoint in the rear portion, and whereby a distance between facing sides of the respective leg portions in the transverse direction varies in the longitudinal direction, and a maximum distance between the facing sides of the respective leg portions in the transverse direction is in the crotch portion located at a position in the longitudinal direction corresponding to a position of a crotch point, and

wherein said facing sides of the respective leg portions converge backwards in the longitudinal direction such that said distance is reduced from said maximum distance to a minimum distance.

31 . The disposable hygiene article according to claim 29 , wherein the outer free end of the first front conforming line is located adjacent to the left core edge line with a gap therebetween, and the outer free end of the second front conforming line is adjacent to the right core edge line with a gap therebetween.

Assignments (1)

Continuity (1)

References Cited (195)