US5037416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable absorbent article having elastically extensible topsheet
Assignee: Procter and Gamble Co
•
Filing: 1989-03-09
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Granted: 1991-08-06
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Expires: 2009-03-09
Abstract
Abstract A disposable absorbent article, such as a diaper, is disclosed. The topsheet of the diaper is elastically extensible and provides a relatively low contact pressure against the skin of the wearer at relatively high elongations. This arrangement provides a diaper topsheet which can be elongated to conform to the shape of the wearer without causing undue discomfort or irritation. The relatively low ultimate contact pressure at relatively high elongation may be accomplished either through a low contact force differential material, or through a material which exhibits stress relaxation over a relatively short period of time. The topsheet may be a laminate having one elastomeric lamina and an inelastic lamina. Also disclosed is a method for making such a laminate.
Inventors
- 👤 Patrick J. Allen
- 👤 Mary E. Freeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/49; A61F13/495; A61F13/49007; A61F13/49009; A61F13/51; A61F13/511; A61F13/513; A61F13/515; B; B31; B31D; B31D1/00; B31D1/04; A61F13/15577; A61F2013/15821; A61F2013/49042; A61F2013/49044; A61F2013/49068; A61F2013/49076; A61F2013/51322
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
68 words
A disposable absorbent article comprising: a liquid impervious backsheet; a liquid pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 800 grams per centimeter of width; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 2
Dependent Claim
68 words
A disposable absorbent article comprising: a liquid impervious backsheet; a liquid pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 800 grams per centimeter of width; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 3
Dependent Claim
90 words
A disposable absorbent article comprising: a liquid impervious backsheet; a liquid pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 800 grams per centimeter of width and has a differential force per 50 percent increment of elongation less than about 9 grams per centimeter of said cumulative width; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 4
Dependent Claim
90 words
A disposable absorbent article comprising: a liquid impervious backsheet; a liquid pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 800 grams per centimeter of width and has a differential force per 50 percent increment of elongation less than about 9 grams per centimeter of said cumulative width; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 5
Dependent Claim
82 words
A disposable absorbent article comprising: a liquid impervious backsheet; a urine pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 800 grams per centimeter of width and after about 10 minutes at a temperature of at least about 22° C.; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 6
Dependent Claim
82 words
A disposable absorbent article comprising: a liquid impervious backsheet; a urine pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 800 grams per centimeter of width and after about 10 minutes at a temperature of at least about 22° C.; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 7
Dependent Claim
36 words
A disposable absorbent article according to claim 1, 2 or 3, wherein said topsheet is comprised of a laminate having at least two laminae, wherein one lamina is elastically extensible and one lamina is relatively inextensible.
Claim 8
Dependent Claim
16 words
A disposable absorbent article according to claim 4, wherein said extensible lamina is an elastomeric film.
Claim 9
Dependent Claim
17 words
A disposable absorbent article according to claim 5, wherein said elastomeric film comprises a pressure sensitive adhesive.
Claim 10
Dependent Claim
37 words
A disposable absorbent article according to claim 1, 2 or 3, wherein said topsheet is elastically elongated between about 100 percent and about 300 percent under a tensile load of about 800 grams per centimeter of width.
Claim 11
Dependent Claim
32 words
A disposable absorbent article according to claim 2, wherein said topsheet has a differential force per 50 percent increment of elongation less than about 6 grams per centimeter of said cumulative width.
Claim 12
Dependent Claim
48 words
A disposable absorbent article according to claim 3, wherein said topsheet is elongated greater than 50 percent and less than about 100 percent under a tensile load of about 400 grams per centimeter of width after about 10 minutes at a temperature of at least about 22° C.
Claim 13
Dependent Claim
18 words
A disposable absorbent article according to claim 1, 2, or 3 further comprising a passageway through said topsheet.
Claim 14
Dependent Claim
24 words
A disposable absorbent article according to claim 1, 2, 3, or 8 wherein said topsheet is elongated without rupture throughout said range of elongation.
Claim 15
Dependent Claim
68 words
A disposable absorbent article comprising: a liquid impervious backsheet; a liquid pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 400 grams per centimeter of width; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 16
Dependent Claim
68 words
A disposable absorbent article comprising: a liquid impervious backsheet; a liquid pervious topsheet at least partially peripherally joined to said backsheet, wherein said topsheet is elastically extensible in at least one direction to an elongation greater than 50 percent and less than about 350 percent under a tensile load of about 400 grams per centimeter of width; and an absorbent core disposed intermediate said topsheet and said backsheet.
Claim 17
Dependent Claim
33 words
A disposable absorbent article according to claim 12, wherein said topsheet is elongated between about 100 percent and about 300 percent under a tensile load of about 400 grams per centimeter of width.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |