US4063558A
Expired / Lapsed
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Article and method for making high fluid-holding fiber mass
Assignee: Akzo Nobel UK PLC
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Filing: 1976-11-12
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Granted: 1977-12-20
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Expires: 1996-11-12
Abstract
Abstract Method for making alloy fibers having high fluid-holding capacity, the alloy fibers being comprised of a matrix of regenerated cellulose having alkali metal salts of alginic acid uniformly dispersed therein.
Inventors
- 👤 Frederick R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61L15/42; A61L15/60; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S604/00; Y10S604/904; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2965
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
50 words
An article of manufacture comprising a highly fluid absorbent mass of alkaline alloy fibers comprising a matrix of regenerated cellulose and an alginic acid salt of alkali-metals dispersed therein, said salt being present in an amount of at least about 5 weight percent based on the weight of the cellulose.
Claim 2
Dependent Claim
50 words
An article of manufacture comprising a highly fluid absorbent mass of alkaline alloy fibers comprising a matrix of regenerated cellulose and an alginic acid salt of alkali-metals dispersed therein, said salt being present in an amount of at least about 5 weight percent based on the weight of the cellulose.
Claim 3
Dependent Claim
37 words
The article of claim 1 wherein the alginic acid salt of alkali-metals is present in the regenerated cellulose in an amount ranging from about 5 to about 30 weight percent, based on the weight of the cellulose.
Claim 4
Dependent Claim
15 words
The article of claim 1 wherein the fibers have a lubricating finish for cellulose thereon.
Claim 5
Dependent Claim
11 words
The article of claim 1 in the form of a pad.
Claim 6
Dependent Claim
11 words
The article of claim 1 in the form of a tampon.
Claim 7
Dependent Claim
23 words
An article as in claim 3 wherein said fibers are carded staple fibers, said article comprising a compressed mass of said staple fibers.
Claim 8
Dependent Claim
59 words
An alkaline alloy fiber comprising a matrix of regenerated cellulose and alginic acid salt of alkali-metals, said fiber having a lubricating finish for cellulose thereon said salt being such, and present in such proportion, within the range of about 5 to about 30 percent based on the weight of cellulose, that the "fluid-holding capacity" is at least 4.79 cc./g.
Claim 9
Dependent Claim
59 words
An alkaline alloy fiber comprising a matrix of regenerated cellulose and alginic acid salt of alkali-metals, said fiber having a lubricating finish for cellulose thereon said salt being such, and present in such proportion, within the range of about 5 to about 30 percent based on the weight of cellulose, that the "fluid-holding capacity" is at least 4.79 cc./g.
Claim 10
Dependent Claim
33 words
Fiber as in claim 7, said fiber being in staple form, said alkali-metal being in sodium form and said salt being present in amount of at least 10% based on weight of cellulose.
Claim 11
Independent Claim
88 words
A method of preparing highly absorbent alloy fibers comprising mixing an alginic acid salt of alkali-metals with a filament-forming viscose whereby the viscose predominates in the mixture, forming the mixture into fibers, coagulating and regenerating the fibers, applying a lubricating finish for cellulose to said fibers, and drying the fibers in an alkaline state with said alginic acid salt in said fiber in the form of an alkali-metal salt, the proportion of said alginic acid salt added to said viscose being at least about 5% based on cellulose.
Claim 12
Independent Claim
88 words
A method of preparing highly absorbent alloy fibers comprising mixing an alginic acid salt of alkali-metals with a filament-forming viscose whereby the viscose predominates in the mixture, forming the mixture into fibers, coagulating and regenerating the fibers, applying a lubricating finish for cellulose to said fibers, and drying the fibers in an alkaline state with said alginic acid salt in said fiber in the form of an alkali-metal salt, the proportion of said alginic acid salt added to said viscose being at least about 5% based on cellulose.
Claim 13
Dependent Claim
30 words
Method as in claim 9 wherein said alkali-metal salt in said dried alkaline fibers is such, and present in such proportion, that the "fluid-holding capacity" is at least 4.79 cc./g.
Claim 14
Dependent Claim
16 words
Method as in claim 10 wherein said salt in said alkaline fibers is a sodium salt.
Claim 15
Dependent Claim
19 words
Method as in claim 11 and including the step of cutting the fiber tow into staple form before drying.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |