Absorbent article with comfortable and rapid acquisition topsheet

• US 6,117,523 A
• Filed: 11/08/1996
• Issued: 09/12/2000
• Est. Priority Date: 11/11/1991
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Sugahara, Kazuko
• Primary Examiner(s): Cole, Elizabeth M.
• Application Number:
  US08/744,892
• Time in Patent Office: 1,404 Days
• Field of Search: 428/131, 428/134, 428/136, 428/137, 428/138, 428/189, 428/190, 604/385.1, 604/385.2, 442/394
• US Class Current: 428/134
• CPC Class Codes: A61F 13/51121 characterised by the material
• CPC Class Codes: A61F 13/5116 being formed of multiple layers A61F13/5123 takes precedence
• CPC Class Codes: A61F 13/5123 the apertures being formed on a multilayer top sheet
• CPC Class Codes: A61F 2013/15373 Calliper, i.e. thickness
• CPC Class Codes: A61F 2013/4708 Panty-liner
• CPC Class Codes: A61F 2013/51061 for rendering the surface hydrophobic
• CPC Class Codes: A61F 2013/51165 with the combination of films and nonwovens
• CPC Class Codes: A61F 2013/530445 by defining a target or acquisition or vulnerability zone
• CPC Class Codes: A61F 2013/53726 on the top layer
• CPC Class Codes: Y10T 428/24298 Noncircular aperture [e.g., slit, diamond, rectangular, etc.]
• CPC Class Codes: Y10T 428/24314 Slit or elongated
• CPC Class Codes: Y10T 428/24322 Composite web or sheet
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• CPC Class Codes: Y10T 428/2476 Fabric, cloth or textile component
• CPC Class Codes: Y10T 442/674 Nonwoven fabric with a preformed polymeric film or sheet

Abstract

An absorbent article such as a sanitary napkin, having an improved topsheet that provides improved skin comfort as well as superior fluid handling characteristics. Such absorbent articles comprise a main body portion preferably comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core positioned between the topsheet and the backsheet. The main body portion has longitudinal edges and lateral edges. The topsheet has a central zone and a pair of end zones extending laterally outwardly from and contiguous with the central zone. The topsheet comprises a nonwoven outer layer and an apertured thermoplastic film layer. The nonwoven outer layer has an opening positioned in the central zone. The apertured thermoplastic film layer is positoned beneath the nonwoven outer layer so that the apertured thermoplastic film layer and the nonwoven outer layer covers the end zones while the apertured thermoplastic film layer is exposed through the opening of the nonwoven outer layer in the central zone.

Claims

1. An absorbent article comprising:

a main body portion having a longitudinal centerline defining a longitudinal direction, a lateral centerline perpendicular to said longitudinal centerline defining a lateral direction, substantially longitudinally oriented edges and substantially laterally oriented edges, wherein said substantially longitudinally oriented edges and said substantially laterally oriented edges define a periphery for said main body portion and wherein at least one of said substantially laterally oriented edges is wider than the width of said main body portion at a location between said substantially laterally oriented edges, said main body portion comprising;

a composite liquid pervious topsheet having a central zone and a pair of longitudinally oriented side zones each said side zone being positioned between said central zone and one of said longitudinal edges of said main body, said composite topsheet comprising;

a) a nonapertured nonwoven outer layer which is able to acquire liquids deposited thereon, said nonwoven outer layer having a pair of longitudinally oriented inner edges in a predetermined spaced apart relationship wherein the lateral separation between said inner edges defines the lateral width of said central zone,

b) an apertured thermoplastic film layer having longitudinal edges, said apertured thermoplastic film layer being positioned beneath said nonwoven outer layer so that said nonwoven outer layer overlies said apertured thermoplastic film layer in said side zones and said apertured thermoplastic film layer is exposed in at least a portion of said central zone, at least a portion of said thermoplastic film layer being treated with surfactant, wherein

c) said nonwoven outer layer and said apertured thermoplastic film layer are joined by a pattern of intermittent fusion bonds;

a liquid impervious backsheet associated with said topsheet; and

an absorbent core having side edges, said absorbent core being positioned between said topsheet and said backsheet.

2. The absorbent article of claim 1 wherein said nonwoven outer layer comprises two strips spaced apart on top of said apertured thermoplastic film layer.

3. The absorbent article of claim 1 or 2 additionally comprising a nonwoven secondary layer positioned between said topsheet and said absorbent core, wherein said secondary layer is joined to both of said topsheet and said absorbent core.

4. The absorbent article of claim 3 wherein said nonwoven secondary layer and said nonwoven outer layer consist of a single piece of material c-folded around said longitudinal edges of said apertured thermoplastic film layer in each said side zone.

5. The absorbent article of claim 1 or 2 wherein said absorbent core is positioned below said central zone and said side zones.

6. The absorbent article of claim 1 or 2 wherein said side edges of said absorbent core form the longitudinal edges of said main body portion.

7. The absorbent article of claim 1 wherein said apertured thermoplastic film layer and said absorbent core are laterally coextensive.

8. The absorbent article of claim 1 or 2 additionally comprising a pair of flaps, each flap extending laterally outward beyond one of said longitudinal edges of said main body portion.

9. The absorbent article of claim 8 wherein each said flap comprises an extension of said nonwoven outer layer of said topsheet and an extension of said backsheet.

10. The absorbent article of claim 9 wherein said absorbent core and said apertured thermoplastic film layer are substantially laterally coextensive and positioned below said central zone and said side zones.

11. The absorbent article of claim 1 wherein the article is a pantiliner.

12. The absorbent article of claim 1 wherein the article is a sanitary napkin.

13. An absorbent article comprising:

a main body portion having a longitudinal centerline defining a longitudinal direction, a lateral centerline perpendicular to said longitudinal centerline defining a lateral direction, substantially longitudinally oriented edges and substantially laterally oriented edges, wherein said substantially longitudinally oriented edges and said substantially laterally oriented edges define a periphery for said main body portion and wherein at least one of said substantially laterally oriented edges is wider than the width of said main body portion at a location between said substantially laterally oriented edges, said main body portion comprising;

a liquid pervious composite topsheet having a central zone and a pair of longitudinally oriented side zones each said side zone being positioned between said central zone and one of said longitudinal edges of said main body, said composite topsheet comprising;

a) a nonapertured nonwoven outer layer which is able to acquire liquids deposited thereon, said nonwoven outer layer comprising a bicomponent web and having a pair of longitudinally oriented inner edges in a predetermined spaced apart relationship wherein the lateral separation between said inner edges defines the lateral width of said central zone,

b) an apertured thermoplastic film layer having longitudinal edges, said apertured thermoplastic film layer being positioned beneath said nonwoven outer layer so that said nonwoven outer layer overlies said apertured thermoplastic film layer in said side zones and said apertured thermoplastic film layer is exposed in at least a portion of said central zone, at least a portion of said thermoplastic film layer being treated with surfactant, wherein

c) said nonwoven outer layer and said apertured thermoplastic film layer are joined by a pattern of intermittent fusion bonds;

a liquid impervious backsheet associated with said topsheet;

an absorbent core having side edges, said side edges extending outward such that said absorbent core is positioned between and joined to said topsheet and said backsheet about said periphery; and

panty attachment means disposed on an outer surface of said backsheet in at least said central zone.

14. An absorbent article according to claim 13 wherein said absorbent article further comprises a secondary layer positioned between said absorbent core and said apertured thermoplastic film layer.