US4415388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making absorbent bearing products
Assignee: Johnson and Johnson
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Filing: 1981-08-05
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Granted: 1983-11-15
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Expires: 2001-08-05
Abstract
Abstract Particulate absorbents of a water-insoluble water-swellable polymer having a gel capacity of at least 10 are immobilized with a composition comprising the absorbent in a liquid polyhydroxy organic compound. The composition may be employed by applying to an appropriate surface and subjecting the liquid film to solidifying conditions. The solidified film product has high absorptive capacity and is free of undesirable movement when positioned in absorbent articles. A foam product having both absorptive and cushioning properties is prepared from a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound.
Inventors
- 👤 Ralf Korpman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:06
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61L; A61L15/00; A61L15/16; A61L15/20; A61L15/42; A61L15/425; A61L15/60; A61F13/20; A61F2013/15008; A61F2013/15048; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/530802; Y; Y10; Y10S; Y10S604/00; Y10S604/904; Y10T; Y10T156/00; Y10T156/11; Y10T156/1111; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A process for producing an absorbent bearing foam product comprising: (1) feeding into a cold extruder the components of a liquid foam-forming composition comprising a particulate water-insoluble, water-swellable absorbent polymer having a gel capacity of at least 10, a liquid polyhydroxy organic compound, and a blowing agent, wherein the amounts of the components are from about 25 to about 125 parts by weight of the absorbent polymer and from about 2 to about 30 parts by weight of blowing agent for every 100 parts by weight of liquid polyhydroxy organic compound; (2) passing the components through an extruder barrel at ambient temperature to intimately mix the components; (3) forcing the resulting mixture into a die maintained at temperatures in the range of about 200° to 400° F. to cause foam formation; (4) expelling the foam through the orifice of the heated die onto a temporary or permanent substrate; and (5) allowing the foam to solidify into an absorbent bearing solidified structure.
Claim 2
Dependent Claim
161 words
A process for producing an absorbent bearing foam product comprising: (1) feeding into a cold extruder the components of a liquid foam-forming composition comprising a particulate water-insoluble, water-swellable absorbent polymer having a gel capacity of at least 10, a liquid polyhydroxy organic compound, and a blowing agent, wherein the amounts of the components are from about 25 to about 125 parts by weight of the absorbent polymer and from about 2 to about 30 parts by weight of blowing agent for every 100 parts by weight of liquid polyhydroxy organic compound; (2) passing the components through an extruder barrel at ambient temperature to intimately mix the components; (3) forcing the resulting mixture into a die maintained at temperatures in the range of about 200° to 400° F. to cause foam formation; (4) expelling the foam through the orifice of the heated die onto a temporary or permanent substrate; and (5) allowing the foam to solidify into an absorbent bearing solidified structure.
Claim 3
Dependent Claim
29 words
A process according to claim 1 in which the particular absorbent is an acrylate polymer or acrylate modified polysaccharide and the polyhydroxy organic compound is glycerol or ethylene glycol.
Claim 4
Dependent Claim
26 words
A process according to claim 1 in which the foam is expelled onto a permanent substrate to obtain the product as a foam coated absorbent article.
Claim 5
Dependent Claim
32 words
A process according to claim 1 in which the foam is expelled onto a temporary substrate suitable for stripping, thereafter stripping to obtain the product as a self-supporting foam sheet or strip.
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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |