Winged sanitary napkin having barrier means

• US 5,820,618 A
• Filed: 07/15/1997
• Issued: 10/13/1998
• Est. Priority Date: 03/31/1992
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Roberts, John David, Mancel, Claude Paul
• Primary Examiner(s): Polutta, Mark O.
• Application Number:
  US08/892,713
• Time in Patent Office: 455 Days
• Field of Search: 604/385.1-387, 604/358, 604/378, 604/389
• US Class Current: 604/385.04
• CPC Class Codes: A61F 13/4752 the means being an upstanding barrier
• CPC Class Codes: A61F 13/4753 the barrier being not integral with the topsheet or backsheet
• CPC Class Codes: A61F 13/476 characterised by encircling the crotch region of the undergarment
• CPC Class Codes: A61F 13/49413 the edge leakage prevention means being an upstanding barrier
• CPC Class Codes: A61F 13/51 characterised by the outer layers wicking or transfer layers A61F13/537
• CPC Class Codes: A61F 13/515 characterised by the interconnection of the topsheet and the backsheet
• CPC Class Codes: A61F 13/58 Adhesive tab fastener elements A61F13/5611, A61F13/5616, A61F13/66 take precedence
• CPC Class Codes: A61F 2013/15284 characterized by quantifiable properties
• CPC Class Codes: A61F 2013/15365 Dimensions
• CPC Class Codes: A61F 2013/4948 the edge leakage prevention means being elastic
• CPC Class Codes: A61F 2013/49486 the edge leakage prevention means being padded
• CPC Class Codes: A61F 2013/51066 for rendering the surface hydrophilic
• CPC Class Codes: A61F 2013/51409 being a film
• CPC Class Codes: A61F 2013/530007 being made from pulp

Abstract

A sanitary napkin is provided with a barrier means to provide a barrier against lateral migration of body fluids. The barrier means can be provided on a sanitary napkin which has no wings and comprises in this core a distal edge which is located within the perimeter of the absorbent core during use of the sanitary napkin. The barrier means can also be provided on a sanitary napkin having wings and can be formed of a unitary part of the napkin'"'"'s topsheet or can be formed by a separate strip of material.

Claims

1. A sanitary napkin of the type for placement in an undergarment, the sanitary napkin comprising:

(a) a central absorbent pad having a pair of longitudinal edges, a body contacting surface, a central region, and a pair of ends, said central absorbent pad comprising;

a liquid pervious topsheet;

a liquid impervious backsheet joined with said topsheet; and

an absorbent core positioned between said topsheet and said backsheet;

(b) a flap extending outwardly from each longitudinal edge of said central absorbent pad in said central region, each said flap being joined with said central absorbent pad and being sized and configured to allow each of said flaps to be positioned around the edge of an undergarment at a flexible axis; and

(c) barrier means for restricting liquid migration in the general direction of the lateral sides, each said barrier means comprising;

a barrier element having

a proximal edge joined to said flap, and

a free edge spaced from said proximal edge and being free from securement to at least a portion of said flap or said central absorbent pad.

2. The sanitary napkin of claim 1 wherein said backsheet of said central absorbent pad extends to said flap and forms a portion of a flap backsheet for said flaps.

3. The sanitary napkin of claim 2 wherein said proximal edge is joined to said flap backsheet.

4. The sanitary napkin of claim 3 wherein said topsheet of said central absorbent pad extends to said flaps and forms a portion of a flap topsheet for said flaps.

5. The sanitary napkin of claim 4 wherein each said barrier element is liquid impermeable.

6. The sanitary napkin of claim 5 wherein said free edge of said barrier element is inboard of said proximal edge.

7. The sanitary napkin of claim 6 wherein said free edge is positioned over said absorbent core.

8. The sanitary napkin of claim 2 wherein said topsheet of central absorbent pad extends to said flaps and forms a portion of a flap topsheet for said flaps.

9. The sanitary napkin of claim 8 wherein said proximal edge is joined to said flap topsheet.

10. The sanitary napkin of claim 8 wherein said barrier element is a unitary construction with said flap topsheet.

11. The sanitary napkin of claim 1 wherein said absorbent core has side edges, and each said proximal edge is joined to said flap between said flexible axis and a side edge of said absorbent core.

12. The sanitary napkin of claim 11 wherein each said flap additionally has a second flexible axis allowing said flap to bend upwardly between said flexible axis and said second flexible axis, each said proximal edge being joined to said flap between said second flexible axis and a side edge of said absorbent core.