Disposable sanitary pad

• US 5,312,386 A
• Filed: 09/09/1992
• Issued: 05/17/1994
• Est. Priority Date: 02/15/1989
• Status: Expired due to Term

• Current Assignee: Johnson & Johnson
• Original Assignee: Johnson & Johnson
• Inventors: Correa, Mauro F. C., Neves, Rosana R. D.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): JONES, MARYBETH O
• Application Number:
  US07/942,477
• Time in Patent Office: 615 Days
• Field of Search: 604/379, 604/383, 604/385.1, 604/378, 604/380
• US Class Current: 604/379
• CPC Class Codes: A61F 13/472 specially adapted for female use A61F13/474, A61F13/475, A61F13/476 take precedence
• CPC Class Codes: A61F 13/4752 the means being an upstanding barrier
• CPC Class Codes: A61F 13/4756 the means consisting of grooves, e.g. channels, depressions or embossments, resulting in a heterogeneous surface level
• CPC Class Codes: A61F 13/4758 the means preventing fluid flow in a longitudinal direction
• CPC Class Codes: A61F 13/514 Backsheet, i.e. the impermeable cover or layer furthest from the skin A61F13/15211, A61F13/15252 take precedence
• CPC Class Codes: A61F 13/53 characterised by the absorbing medium A61F13/20 takes precedence
• CPC Class Codes: A61F 2013/51078 being embossed

Abstract

This invention relates to a disposable sanitary napkin having longitudinal edges and transverse ends, having at least one compression line extending along and close to the longitudinal edges, such that the pressure of the user'"'"'s thighs on the product will bring about a protuberance of absorbent material toward the perineal area when worn. The products of this invention thus bring the absorbent material closer to the point of discharge of menstrual fluid, which is the critical cause of leakage from the longitudinal edges of sanitary napkins.

Claims

1. A disposable sanitary pad comprising:

(a) an absorbing element comprising longitudinal and transverse centerlines, first and second longitudinal edges, first and second transverse ends, and a body facing side; and

(b) first and second compression lines formed in said absorbing element, each of said lines comprising;

(i) a central segment extending substantially longitudinally so that a central portion of said body facing side is disposed between said central segments, said lines formed by compression on said body facing side so that pressure against said longitudinal edges by a user'"'"'s thighs causes said body facing side of said central portion to assume a convex shape so as to protrude toward a user'"'"'s body; and

(ii) each of said first and second compression lines having a first end segment connected to said central segment, said first end segments extending both toward each other and toward said first transverse end so as to form an acute angle with said longitudinal centerline, whereby at least a first portion of fluid deposited proximate said transverse centerline is wicked along said compression lines toward a portion of said absorbing element disposed along said longitudinal centerline and proximate said first transverse end;

wherein said first end segment of said first compression line is connected to said first end segment of said second compression line.

2. A pad according to claim 1, characterized in that said compression lines are about 1 to about 12 cm long.

3. A pad according to claim 1, characterized in that the compression lines are pressed onto the structure that constitutes said pad.

4. A pad according to claim 1 wherein said compression lines are about 1.5 to about 5 mm wide.

5. A pad according to claim 1 wherein said central segments of said compression lines are parallel to said longitudinal edges.

6. A pad according to claim 1 wherein said central segments of said compression lines are parallel to each other.

7. A pad according to claim 1 wherein said compression lines are pressed into said absorbing element.

8. A pad according to claim 1 wherein said absorbing element has a permeable layer covering said body facing side, and wherein said compression lines are pressed into said absorbing element and said permeable layer.

9. A pad according to claim 1 wherein each of said first end segments extends toward the other until they meet and then extend along the longitudinal direction.

10. A pad according to claim 1 wherein the distance from each of said central segments of said compression lines to the nearest longitudinal edge is about 5 to about 30 percent of the transverse width of said absorbing element.

11. A pad according to claim 1 wherein the distance from each of said central segments of said compression lines to the nearest longitudinal edge is about 5 to about 20 percent of the transverse width of said absorbing element.

12. A pad according to claim 1, wherein said central segment of said first compression line is disposed closer to said first longitudinal edge than to said second longitudinal edge, and wherein said central segment of said second compression line is disposed closer to said second longitudinal edge than to said first longitudinal edge.

13. A pad according to claim 1, wherein said first and second compression lines each have second end segments, said second end segments extending both toward each other and toward said second transverse end so as to form an acute angle with said longitudinal centerline, whereby at least a second portion of said fluid deposited proximate said transverse centerline is wicked along said compression lines toward a portion of said absorbing element disposed along said longitudinal centerline and proximate said second transverse end.

14. A pad according to claim 13, further comprising third and fourth compression lines formed in said absorbing element by compression on said body facing side, said third compression line connected to said first end segments of said first and second compression lines and extending substantially longitudinally toward said first transverse end, said fourth compression line connected to said second end segments of said first and second compression lines and extending substantially longitudinally toward said second transverse end, whereby at least a portion of each of said first and second portions of said fluid deposited proximate said transverse centerline and wicked along said first and second compression lines is also wicked along said third and fourth compression lines further toward said first and second transverse ends, respectively.

15. A pad according to claim 13, wherein said second end segment of said first compression line is connected to said second end segment of said second compression line so that said first and second compression lines combine to form an approximately elongated hexagonal shape.

16. A pad according to claim 1, further comprising a third compression line formed in said absorbing element by compression on said body facing side, said third compression line connected to said first end segments of said first and second compression lines and extending substantially longitudinally toward said first transverse end, whereby at least a portion of said portion of said fluid deposited proximate said transverse centerline and wicked along said first and second compression lines is also wicked along said third compression line further toward said first transverse end.

17. A pad according to claim 1, further comprising a third compression line formed in said absorbing element by compression on said body facing side, said third compression line connected to said first end segment of said first compression line and extending substantially longitudinally toward said first transverse end, whereby at least a portion of said portion of fluid deposited proximate said transverse centerline and wicked along said first compression line is further wicked along said third compression line further toward said first transverse end.

18. A pad according to claim 1, wherein said compression lines each have a width of less than approximately 5 mm.

19. A pad according to claim 1, wherein said absorbing element, when uncompressed, has a first density and said compression lines each have a second density greater than the first density, whereby said compression lines are capable of wicking fluid there-along.