Absorbent article such as a sanitary napkin, an incontinence guard, a panty-liner or the like

• US 6,524,291 B1
• Filed: 08/04/1999
• Issued: 02/25/2003
• Est. Priority Date: 11/15/1996
• Status: Expired due to Fees

• Current Assignee: SCA Hygiene Products AB (Essity AB)
• Original Assignee: SCA Hygiene Products AB (Essity AB)
• Inventors: Drevik, Solgun, Gustafsson, Anders, Widlund, Urban, Samuelsson, Ann, Björklund, Camilla
• Primary Examiner(s): Ruhl, Dennis
• Assistant Examiner(s): Webb, Jamisue
• Application Number:
  US09/297,637
• Time in Patent Office: 1,301 Days
• Field of Search: 604/385.01, 604/385.03, 604/385.21, 604/385.23, 604/386, 604/387, 604/385.31
• US Class Current: 604/385.03
• CPC Class Codes: A61F 13/4702 having a reinforcing member
• CPC Class Codes: A61F 13/47209 having only interlabial part, i.e. with no extralabial parts

Abstract

The invention relates to an absorbent article such as a sanitary napkin, an incontinence guard, or a panty-liner, which article has a substantially elongated shape with a longitudinal direction and a transverse direction and also exhibits two side edges (9, 10), a front edge (11) and a rear edge (12), a front portion (6) and a rear portion (7), and a crotch portion (8) situated between the front portion (6) and the rear portion (7), which article furthermore exhibits a liquid-impervious surface (2) and a liquid-impervious surface (3). At least within the front portion (6) and the crotch portion (8), the article exhibits high bending stiffness against bending along transversely extending bending lines, whereby the front portion (6) and the crotch portion (8) of the article exhibit high shape permanence during use of the article. Furthermore, the front portion (6) of the article is angled in relation to the crotch portion (8), in a direction towards the liquid-pervious surface (2), whereby the front portion (6) forms and angle α towards the crotch portion (8) which is substantially permanent during use.

Claims

1. An absorbent article having a substantially elongated shape with a longitudinal direction and a transverse direction, the absorbent article comprising:

two side edges,

a front edge and a rear edge,

said front edge defining a front portion, said rear edge defining a rear portion,

a crotch portion situated between the front portion and the rear portion,

a liquid-pervious cover layer and a liquid-impervious cover layer,

wherein the front portion and the crotch portion of the absorbent article exhibit high shape permanence during use of the article, wherein the front portion of the absorbent article is inclined with respect to the crotch portion in a direction towards the liquid-pervious cover layer at a predetermined angle α

of between 20° and

50°

, the angle α

being permanent while being worn irrespective of a wearer'"'"'s leg movements.

2. The absorbent article according to claim 1, wherein the front portion is curved along a longitudinal centre line through the absorbent article.

3. The absorbent article according to claim 1, wherein the front edge of the absorbent article exhibits a recess by means of the front edge being curved in a direction towards the crotch portion of the absorbent article.

4. The absorbent article according to claim 1, wherein the absorbent article, at least within the front portion and the crotch portion, exhibits high bending stiffness against bending in the transverse direction along longitudinally extending bending lines.

5. The absorbent article according to claim 1, wherein the absorbent article is a sanitary napkin, an incontinence guard, or a panty liner.

6. The absorbent article according to claim 1, wherein the front portion is curved along a transverse line through the absorbent article, wherein the side edges of the absorbent article at the front portion are raised on both sides of the longitudinal centre line of the article so that the side edges are situated above the longitudinal centre line of the absorbent article when the absorbent article is viewed from the liquid-pervious cover layer.

7. The absorbent article according to claim 6, wherein a maximum deviation (h) from a transverse line between the side edges of the absorbent article does not exceed 10 mm at the front edge of the absorbent article.

8. The absorbent article according to claim 1, wherein longitudinal ridges having a rounded surface are arranged along the side edges of the absorbent article at least in the crotch portion.

9. The absorbent article according to claim 8, wherein the ridges are formed of a stiff sheet of material.

10. The absorbent article according to claim 1, wherein the crotch portion of the article exhibits a transversely extending cross-sectional line from which a width of the article increases in a direction toward at least one of the ends of the absorbent article, wherein the front portion has a maximum width which is larger than a width of the crotch portion at the cross-sectional line, wherein the long sides of the article change inclination at the transversely extending cross-sectional line, the inclination being defined by an angle β

between a longitudinal line parallel to the direction of the article and each of the long sides of the absorbent article, respectively, wherein β

is between 30° and

90°

, and wherein the width of the crotch portion at the transversely extending cross-sectional line is at most 50 mm.

11. The absorbent article according to claim 10, wherein the width of the absorbent article at the cross sectional line is between 20 and 40 mm.

12. An absorbent article having a substantially elongated shape with a longitudinal direction and a transverse direction, the absorbent article comprising:

two side edges,

a front edge and a rear edge,

said front edge defining a front portion, said rear edge defining a rear portion,

a crotch portion situated between the front portion and the rear portion,

a liquid-pervious cover layer and a liquid-impervious cover layer,

wherein the front portion and the crotch portion of the absorbent article exhibit high shape permanence during use of the article, wherein the front portion of the absorbent article is inclined with respect to the crotch portion in a direction towards the liquid-pervious cover layer at a predetermined angle α

of between 20° and

50°

, the angle α

being permanent while being worn irrespective of a wearer'"'"'s leg movements, and

the absorbent article further comprising a rigid shape-retaining element, the rigid shape-retaining element comprising non-elastic material.

13. The absorbent article according to claim 12 wherein the rigid shape-retaining element comprises a stiff plastic sheet which also forms the liquid-impervious cover layer of the absorbent article.

14. The absorbent article according to claim 12, wherein the shape-retaining element extends across the front portion and the crotch portion of the absorbent article.

15. The absorbent article according to claim 12, wherein the rigid shape-retaining element extends across the front portion and the crotch portion of the absorbent article, is located between the liquid-pervious cover layer and the liquid-impervious cover layer, and exhibits a bending line extending in the transverse direction of the absorbent article, wherein a front part of the shape-retaining element is angled in relation to a back part of the shape-retaining element along the bending line of the shape-retaining element, and wherein an angle formed between the front part and the back part of the rigid shape-retaining element corresponds to the angle α

between the front portion and the crotch portion of the absorbent article.

16. The absorbent article according to claim 15, wherein the bending line of the shape-retaining element is curved.