Absorbent article with multiple zone structural elastic-like film web extensible waist feature

• US 5,554,145 A
• Filed: 02/28/1994
• Issued: 09/10/1996
• Est. Priority Date: 02/28/1994
• Status: Expired due to Term

• Current Assignee: W. E. Hall Company Incorporated
• Original Assignee: The Procter & Gamble Company
• Inventors: Roe, Donald C., Carlin, Edward P., Goulait, David J. K., Dreier, Kimberly A., Rodriguez, Sheila S., Daniels, Dean J., Jasper, Carolyn M.
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): POLUTTA, MARK O
• Application Number:
  US08/203,456
• Time in Patent Office: 925 Days
• Field of Search: 604/358, 604/373, 604/385.1, 604/385.2, 604/393-394, 604/396, 604/397, 604/402
• US Class Current: 604/385.3
• CPC Class Codes: A61F 13/49009 with elastic means
• CPC Class Codes: A61F 13/49012 the elastic means being elastic panels
• CPC Class Codes: A61F 13/49015 the elastic means being elastic panels
• CPC Class Codes: A61F 13/49017 the elastic means being located at the crotch region
• CPC Class Codes: A61F 13/4902 characterised by the elastic material
• CPC Class Codes: A61F 2013/49028 with different tensile stress
• CPC Class Codes: Y10T 428/24446 Wrinkled, creased, crinkled or creped
• CPC Class Codes: Y10T 428/2457 Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24636 Embodying mechanically interengaged strand[s], strand-portion[s] or strand-like strip[s] [e.g., weave, knit, etc.]
• CPC Class Codes: Y10T 442/602 Nonwoven fabric comprises an elastic strand or fiber material
• CPC Class Codes: Y10T 442/659 Including an additional nonwoven fabric
• CPC Class Codes: Y10T 442/674 Nonwoven fabric with a preformed polymeric film or sheet

Abstract

Absorbent articles such as disposable diapers, incontinent briefs, diaper holders, training pants, feminine hygiene garments and the like, that have a unique waist feature that improves the dynamic fit as well as the containment characteristics of the absorbent article. Such absorbent articles comprise a chassis assembly preferably comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core positioned between the topsheet and the backsheet; an extensible back waist feature; and a closure system for maintaining the absorbent article on the wearer. The extensible back waist feature provides an extensible feature that provides a more comfortable and contouring fit by initially conformably fitting the diaper to the wearer and by sustaining this fit. The extensible back waist feature has a hip panel, a central waistband panel, and a pair of side panels. The force/extension characteristics of each panel is designed to provide such improved fit and containment. While each panel of the extensible waist feature may be constructed from a number of extensible materials, the panels preferably comprise a structural elastic-like film web. The structural elastic-like film (SELF) web exhibits an elastic-like behavior in the direction of elongation without the use of added elastic materials. The configuration of the SELF web in each panel has specific characteristics to provide the desired force/extension characteristics of each panel.

Claims

1. A disposable absorbent article having a front waist region and a back waist region, the absorbent article comprising:

a chassis assembly comprising a liquid pervious topsheet, a liquid impervious backsheet joined with said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

an extensible back waist feature positioned in said back waist region, said extensible back waist feature joined to and extending longitudinally outwardly from said chassis assembly, said extensible back waist feature comprising;

(a) a hip panel extending longitudinally outwardly from said absorbent core, said hip panel being extensible in a direction having a vector component in the lateral direction;

(b) a central waistband panel joined to and extending longitudinally outwardly from said hip panel, said central waistband panel being extensible in a direction having a vector component in the lateral direction, the extension force of said central waistband panel being greater than the extension force of said hip panel; and

(c) a pair of side panels joined to and extending laterally outwardly from said central waistband panel and at least a portion of said hip panel, each said side panel being extensible in a direction having a vector component in the lateral direction.

2. The absorbent article of claim 1 wherein said hip panel comprises a structural elastic-like film web comprising a strainable network of at least two contiguous, distinct and dissimilar regions, said strainable network including at least a first region and a second region having one or more rib-like elements.

3. The absorbent article of claim 2 wherein said side panels each comprise a structural elastic-like film web.

4. The absorbent article of claim 3 wherein said central waistband panel comprises a structural elastic-like film web.

5. The absorbent article of claim 4 wherein the extension force of said central waistband panel is greater than the extension force of each said side panel.

6. The absorbent article of claim 5 wherein the extension force of each said side panel is greater than the extension force of said hip panel.

7. The absorbent article of claim 6 wherein said SELF web of said central waistband panel has an extension force between about 10 g/cm and about 30 g/cm at 50% extension.