US4629457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent facing and method for making the same
Assignee: JPMorgan Chase Bank NA
•
Filing: 1985-10-02
•
Granted: 1986-12-16
•
Expires: 2005-10-02
Abstract
Abstract An absorbent facing is disclosed which has significant one-way valve characteristics for aqueous fluids. The facing is produced by a process which comprises the steps of: (a) superimposing a thin polymer film and a first web comprising absorbent fibers, to form a second web; (b) heating the second web to a temperature such that the polymer film is in a formable state; (c) while the said second web is so heated, simultaneously applying shearing and compressive forces to the second web to form said polymer film into a coating on said first web, the coating comprising a fine pattern of continuous areas which lie between and interconnect discontinuous areas, wherein the polymer in the continuous areas comprises a continuous or substantially continuous coating on the surface of said first web, and wherein most of the polymer in the discontinuous areas is coated on individual fibers; and (d) cooling the coated web thus formed to cool the polymer below its forming temperature.
Inventors
- 👤 Irving S. Ness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:24
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15699
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
Process for producing an absorbent facing material, which process comprises: (a) superimposing a thin polymer film and a first web comprising absorbent fibers, to form a second web having said thin polymer film on one face and said first web on the other face; (b) heating said second web to a temperature such that said polymer film is formable; (c) while said second web is so heated, simultaneously applying shearing and compressive forces to said second web to form said polymer film into a coating on said first web, said coating comprising a fine pattern of continuous areas which lie between and interconnect discontinuous areas, wherein the polymer in the continuous areas comprises an at least substantially continuous coating on the surface of said first web, and wherein most of the polymer in the discontinuous areas is coated on individual fibers underlying said discontinuous areas; and (d) cooling the coated web thus formed to cool said polymer below its forming temperature.
Claim 2
Dependent Claim
161 words
Process for producing an absorbent facing material, which process comprises: (a) superimposing a thin polymer film and a first web comprising absorbent fibers, to form a second web having said thin polymer film on one face and said first web on the other face; (b) heating said second web to a temperature such that said polymer film is formable; (c) while said second web is so heated, simultaneously applying shearing and compressive forces to said second web to form said polymer film into a coating on said first web, said coating comprising a fine pattern of continuous areas which lie between and interconnect discontinuous areas, wherein the polymer in the continuous areas comprises an at least substantially continuous coating on the surface of said first web, and wherein most of the polymer in the discontinuous areas is coated on individual fibers underlying said discontinuous areas; and (d) cooling the coated web thus formed to cool said polymer below its forming temperature.
Claim 3
Dependent Claim
19 words
Process of claim 1 wherein step (b) includes contacting said other face with a heated, continuously moving, uniform surface.
Claim 4
Dependent Claim
39 words
Process of claims 1 or 2 wherein step (c) includes contacting said one face with a continuously moving resilient surface having a pattern of continuously arranged recessed areas and discontinuously arranged raised areas disposed uniformly over said resilient surface.
Claim 5
Dependent Claim
92 words
Process of claim 1 wherein said process includes passing said second web through the nip between a pair of counter-rotating rolls, the first roll of said pair being in contact with said one face and having a resilient surface that has a pattern of continuously arranged recessed areas and discontinuously arranged raised areas disposed uniformly over said resilient surface, and the second roll of said pair being in contact with said other face, wherein said second roll has a smooth, uniform surface, and wherein at least one of said rolls is heated.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein said first roll is moving at a slightly higher peripheral speed than said second roll.
Claim 7
Dependent Claim
28 words
The process of claims 4 or 5 wherein the pressure at said nip is within the range of from about 5 to about 90 pounds per linear inch.
Claim 8
Dependent Claim
12 words
The process of claim 4 wherein the polymer is an olefin polymer.
Claim 9
Dependent Claim
22 words
The process of claim 7 whrein the polymer film has a thickness of from about 1/4 mil to about 1 1/4 mils.
Claim 10
Dependent Claim
13 words
The process of claim 4 wherein the first web comprises absorbent papermaking fibers.
Claim 11
Dependent Claim
13 words
The process of claim 7 wherein the first web comprises absorbent papermaking fibers.
Claim 12
Dependent Claim
13 words
The absorbent facing material produced by the process of claims 1 or 4.
Claim 13
Dependent Claim
24 words
An absorbent product having an absorbent core and an absorbent facing material, wherein said absorbent facing material is the absorbent facing of claim 11.
Claim 14
Dependent Claim
13 words
The absorbent product of claim 12 wherein said product is a surgical dressing.
Claim 15
Dependent Claim
13 words
The absorbent product of claim 12 wherein said product is a sanitary napkin.
Claim 16
Dependent Claim
13 words
The absorbent product of claim 12 wherein said product is a disposable diaper.
References Cited (Backward Citations)
US2862251A
Cited
US3221738A
Cited
US3331728A
Cited
US3307545A
Cited
US3441021A
Cited
US3825007A
Cited
US3911186A
Cited
US3888248A
Cited
US4115176A
Cited
US3994299A
Cited
US5703897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |