US5069970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibers and filters containing said fibers
Assignee: Honeywell International Inc
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Filing: 1989-12-18
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Granted: 1991-12-03
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Expires: 2009-12-18
Abstract
Abstract This invention relates to a fiber comprising a major amount of a continuous phase comprising one or more melt processible polyesters of fiber forming molecular weight, and a minor amount of one or more polyolefins non-uniformly dispersed in said continuous phase such that the concentration of polyolefins at or near the surface of said fiber is greater than the concentration of polyesters at or near the surface of said fiber, and a process for preparing said fiber.
Inventors
- 👤 Theodore Largman
- 👤 Frank Mares
- 👤 Clarke A. Rodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:20
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; D01F6/00; D01F6/88; D01F6/92; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2964; Y10T428/2965; Y10T428/2973; Y10T428/2978
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
79 words
A fiber comprising a continuous phase of one or more melt processible polyesters of fiber forming molecular weight and one or more melt processible polyolefins selected from the group consisting of polypropylene, polybutylene and polyisobutylene non-uniformly dispersed therein, wherein the weight percent of polyolefin within 50 Å of the surface of said fiber is at least about 50 weight percent based on the total weight of said fiber within said about 50 Å of the surface of the fiber.
Claim 2
Dependent Claim
79 words
A fiber comprising a continuous phase of one or more melt processible polyesters of fiber forming molecular weight and one or more melt processible polyolefins selected from the group consisting of polypropylene, polybutylene and polyisobutylene non-uniformly dispersed therein, wherein the weight percent of polyolefin within 50 Å of the surface of said fiber is at least about 50 weight percent based on the total weight of said fiber within said about 50 Å of the surface of the fiber.
Claim 3
Dependent Claim
25 words
A fiber according to claim 1 wherein said polyester is formed from the condensation of an aliphatic or cycloaliphatic diol, and an aromatic dicarboxylic acid.
Claim 4
Dependent Claim
25 words
A fiber according to claim 2 wherein said aromatic dicarboxylic acid is selected from the group consisting of terephthalic acid, isophthalic acid and orthophthalic acid.
Claim 5
Dependent Claim
14 words
A fiber according to claim 3 wherein said aromatic dicarboxylic acid is terephthalic acid.
Claim 6
Dependent Claim
13 words
A fiber according to claim 2 wherein said diol is an aliphatic diol.
Claim 7
Dependent Claim
24 words
A fiber according to claim 1 wherein said polyester is selected from the group consisting of poly(ethylene terephthalate), poly(butylene terephthalate) and poly(1,4-cyclohexane dimethylene terephthalate).
Claim 8
Dependent Claim
12 words
A fiber according to claim 6 wherein said polyester is poly(ethylene terephthalate).
Claim 9
Dependent Claim
11 words
A fiber according to claim 1 wherein said polyolefin is polypropylene.
Claim 10
Dependent Claim
32 words
A fiber according to claim 1 wherein the amount of said polyolefins in said fiber is from about 0.5 to about 25 weight percent based on the total weight of the fiber.
Claim 11
Dependent Claim
24 words
A fiber according to claim 9 wherein the amount of said polyolefins in said fiber is from about 1 to about 15 weight percent.
Claim 12
Dependent Claim
24 words
A fiber according to claim 10 wherein the amount of said polyolefins in said fiber is from about 2.5 to about 10 weight percent.
Claim 13
Dependent Claim
24 words
A fiber according to claim 11 wherein the amount of said polyolefins in said fiber is from about 3 to about 8.5 weight percent.
Claim 14
Dependent Claim
31 words
A fiber according to claim 1 wherein the amount of said polyolefin within said about 50 Å of the surface of said fiber is at least about 80 percent by weight.
Claim 15
Dependent Claim
31 words
A fiber according to claim 13 wherein the amount of said polyolefin within said about 50 Å of the surface of said fiber is at least about 85 percent by weight.
Claim 16
Dependent Claim
15 words
A fiber according to claim 1 wherein said polyolefin is of fiber forming molecular weight.
Claim 17
Dependent Claim
36 words
The fiber according to claim 14 wherein the amount of said polyolefin within said about 50 Å of the surface of said fiber is from about 85 percent by weight to about 98 percent by weight.
Claim 18
Dependent Claim
17 words
A fiber according to claim 1 wherein said fiber is a filament or a plurality of filaments.
Claim 19
Dependent Claim
17 words
A fiber according to claim 17 wherein said fiber is a filament of substantially circular cross section.
Claim 20
Dependent Claim
16 words
A fiber according to claim 17 wherein said fiber is a filament of multilobal cross section.
Claim 21
Dependent Claim
29 words
A fiber according to claim 19 wherein said multilobal fiber has at least about 3 irregular or regular lobes or vanes projecting from the longitudinal axis of said fiber.
Claim 22
Dependent Claim
18 words
A fiber according to claim 20 wherein said fiber has at least about 4 projecting lobes or vanes.
Claim 23
Dependent Claim
18 words
A fiber according to claim 19 wherein the mod ratio of the fiber is at least about 1.8.
Claim 24
Dependent Claim
20 words
A fiber according to claim 22 wherein the mod ratio of the fiber is from about 2.0 to about 7.0.
Claim 25
Dependent Claim
20 words
A fiber according to claim 23 wherein the mod ratio of the fiber is from about 2.2 to about 5.
Claim 26
Dependent Claim
101 words
A fiber which comprises a major amount of a continuous phase comprising one or more melt processible polyesters of fiber forming molecular weight and a minor amount of one or more melt processible polyolefins non-uniformly dispersed in said continuous phase such that the concentration of said polyolefins within at least 50 Å of the surface of said fiber is greater than the concentration of said polyesters within at least 50 Å of the surface of said fiber, wherein said fiber is multi-lobal having at least 4 irregular or regular shaped lobes or vanes projecting from the longitudinal axis of said fiber.
Claim 27
Dependent Claim
101 words
A fiber which comprises a major amount of a continuous phase comprising one or more melt processible polyesters of fiber forming molecular weight and a minor amount of one or more melt processible polyolefins non-uniformly dispersed in said continuous phase such that the concentration of said polyolefins within at least 50 Å of the surface of said fiber is greater than the concentration of said polyesters within at least 50 Å of the surface of said fiber, wherein said fiber is multi-lobal having at least 4 irregular or regular shaped lobes or vanes projecting from the longitudinal axis of said fiber.
Claim 28
Dependent Claim
83 words
A fiber according to claim 25 wherein: said polyolefin is polypropylene and said polyester is poly(ethylene terephthalate); and said polyolefin in said fiber is from about 0.5 to about 25 weight percent based on the total weight of the fiber and wherein the weight percent of polyolefin within said about 50 Å of the surface of the fiber is at least about 85 percent by weight based on the total weight of said fiber within 50 Å of the surface of the fiber.
Claim 29
Dependent Claim
11 words
A fiber according to claim 25 wherein said fiber is hexalobal.
Claim 30
Dependent Claim
31 words
A fiber according to claim 26 wherein the amount of polypropylene within said about 50 Å of the surface of said fiber is from about 85% to about 98% by weight.
Claim 31
Dependent Claim
23 words
A fiber according to claim 28 wherein the amount of polypropylene in said fiber is from about 1 to about 15% by weight.
Claim 32
Dependent Claim
23 words
A fiber according to claim 29 wherein the amount of in said fiber polypropylene is from about 2.5 to about 10% by weight.
Claim 33
Dependent Claim
23 words
A fiber according to claim 30 wherein the amount of in said fiber polypropylene is from about 3 to about 8.5% by weight.
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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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |