US4652484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent article
Assignee: Kao Corp
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Filing: 1985-07-18
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Granted: 1987-03-24
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Expires: 2005-07-18
Abstract
Abstract An absorbent article such as a sanitary napkin and a diaper is improved in the surface material by use of a non-woven fabric of hot-melt fibers which melts at 90° to 140° C. It is disposable.
Inventors
- 👤 Daisuke Shiba
- 👤 Iwao Miyashita
- 👤 Osamu Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:06
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/513; A61F2013/51002; A61F2013/51038; A61F2013/51042; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/27; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/629
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
In an absorbent article comprising an absorbent layer capable of absorbing a liquid, a leakproof layer on one side of said absorbent layer and a non-woven fabric layer on the opposite side of said absorbent layer, said non-woven fabric layer permitting penetration of liquid therethrough into said absorbent layer, the improvement which comprises: said non-woven fabric layer consists of hot-melt, adhesive, synthetic resin fibers consisting of (a) straight fibers of 1 to 3 denier, and (b) sterically buckled fibers of 1.5 to 6 denier, at least a portion of said synthetic resin fibers having a melting point in the range of from 90° to 140° C., said non-woven fabric layer having a tensile strength of at least 250 g/25 mm, said non-woven fabric layer consisting essentially of an assembly of a first sublayer having a basis weight of 5 to 15 g/m 2 and a second sublayer having a basis weight of 8 to 35 g/m 2 , said first sublayer being located remote from said absorbent layer and being adapted to contact the skin of a user, said second layer being adjacent to said absorbent layer, the weight ratio of fibers (a)/fibers (b) being 100-30/0-70 in said first sublayer and being 50-0/50-100 in said second sublayer.
Claim 2
Dependent Claim
207 words
In an absorbent article comprising an absorbent layer capable of absorbing a liquid, a leakproof layer on one side of said absorbent layer and a non-woven fabric layer on the opposite side of said absorbent layer, said non-woven fabric layer permitting penetration of liquid therethrough into said absorbent layer, the improvement which comprises: said non-woven fabric layer consists of hot-melt, adhesive, synthetic resin fibers consisting of (a) straight fibers of 1 to 3 denier, and (b) sterically buckled fibers of 1.5 to 6 denier, at least a portion of said synthetic resin fibers having a melting point in the range of from 90° to 140° C., said non-woven fabric layer having a tensile strength of at least 250 g/25 mm, said non-woven fabric layer consisting essentially of an assembly of a first sublayer having a basis weight of 5 to 15 g/m 2 and a second sublayer having a basis weight of 8 to 35 g/m 2 , said first sublayer being located remote from said absorbent layer and being adapted to contact the skin of a user, said second layer being adjacent to said absorbent layer, the weight ratio of fibers (a)/fibers (b) being 100-30/0-70 in said first sublayer and being 50-0/50-100 in said second sublayer.
Claim 3
Dependent Claim
26 words
An absorbent article as claimed in claim 1 in which from 30 to 70% of said hot-melt synthetic resin fibers melt at 90° to 140° C.
Claim 4
Dependent Claim
40 words
An absorbent article as claimed in claim 1 in which all of the fibers in said first sublayer are fibers of 1 to 3 denier and said fibers (b) in said second sublayer are fibers of 3 to 6 denier.
Claim 5
Dependent Claim
38 words
An absorbent article as claimed in claim 1 in which said synthetic resin fibers are selected from the group consisting of polyethylene/polypropylene conjugate fibers, low melting polyester/polyester conjugate fibers, low melting polyester/polypropylene conjugate fibers and polyethylene/polyester conjugate fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |