Patent US3428345A successfully refreshed from Google Patents.
EP0351318A2
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EP
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Meltblown polymeric dispersions
Assignee: Fitesa Simpsonville Inc
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Filing: 1989-07-13
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Granted: —
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Expires: 2009-07-13
Abstract
Abstract This invention relates to the preparation and use of very thin multiconstituent synthetic fibers. In accordance with the present invention, such fibers are produced from dispersions of incompatible polymers by meltblowing said polymeric dispersions. These procedures permit the preparation of very thin and highly attenuated polymeric fibers that contain microfibrils formed of different polymers. The practice of the present invention permits the preparation of nonwoven fabric webs having "customized" properties that make them suitable in a wide variety of applications. Also, microfibrils - which can themselves be used for various purposes - can be isolated from the multicomponent fibers of the present invention.
Inventors
- 👤 John L. Allan
- 👤 Jeffrey J. Boettcher
- 👤 Leon Katz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 02:55
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4382; D04H1/43838; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/08; D01; D01D; D01D5/00; D01D5/08; D01D5/098; D01D5/0985; D01F; D01F8/00; D04H1/4282; D04H1/4291; D04H1/4326; D04H1/4334; D04H1/435; D04H1/54; D04H1/56; B01D2239/00; B01D2239/02; B01D2239/0216; B01D2239/025; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/064; B01D2239/065; B01D2239/0654; B01D2239/0663; B01D2239/12; B01D2239/1233
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
48 words
A fiber formed by meltblowing a polymeric dispersion that comprises at least two phases in which a first phase is a thermoplastic resin consisting essentially of a polymer, copolymer, or terpolymer and at least one second phase comprises a second incompatible polymer, copolymer, or terpolymer or a metal.
Claim 2
Dependent Claim
48 words
A fiber formed by meltblowing a polymeric dispersion that comprises at least two phases in which a first phase is a thermoplastic resin consisting essentially of a polymer, copolymer, or terpolymer and at least one second phase comprises a second incompatible polymer, copolymer, or terpolymer or a metal.
Claim 3
Dependent Claim
84 words
A fiber according to claim 1 wherein said polymers, copolymers, or terpolymers are selected from the groups consisting of (a) polymers, copolymers, or terpolymers formed from olefins, halogenated-olefins, sulfonated-olefins, acrylic acids and their esters, acrylamides, fumaric acid and its esters, maleic acid and its esters, maleic anhydride, vinyl acetate, vinylpyridine, vinylpyrollidone, and vinylsilanes, (b) polyesters, polyamides, polyimides, polyethers, polyurethanes, polyamines, polysulfides, polyketones, polycarbonates, polysulfones, and polysiloxanes, and (c) salts of said polymers, copolymers, or terpolymers (a) and (b) that contain acidic or basic groups.
Claim 4
Dependent Claim
55 words
A fiber according to claim 2 formed by meltblowing a two-phase polymeric dispersion in which said first phase is a resin that comprises a copolymer of an olefin with an olefinic acid or its derivatives and said second phase contains from about 1% by volume through about 99% by volume of an incompatible polyolefin resin.
Claim 5
Dependent Claim
49 words
A fiber according to claim 3 that comprises a continuous phase of a resin consisting essentially of a copolymer of an olefin with an olefinic acid or its derivatives in which has been dispersed from about 10% by volume through about 90% by volume of an incompatible polyolefin resin.
Claim 6
Dependent Claim
20 words
A fiber according to claim 4 comprising polypropylene microfibrils encapsulated in an ethylene/acrylic acid copolymer or its salts or both.
Claim 7
Dependent Claim
12 words
A nonwoven fabric comprising a web of fibers according to claim 1.
Claim 8
Dependent Claim
15 words
A microfibril produced by extracting the continuous phase resin from the fiber of claim 1.
Claim 9
Dependent Claim
14 words
A bundle of microfibrils or a web composed of microfibrils according to claim 7.
Claim 10
Dependent Claim
19 words
A polypropylene microfibril produced by extracting the ethylene/acrylic acid copolymer or its salts from the fiber of claim 5.
Claim 11
Dependent Claim
14 words
An ion exchange or absorptive medium comprising a nonwoven fabric according to claim 6.
Claim 12
Dependent Claim
17 words
A medium for the absorption of solids or liquids comprising a nonwoven fabric according to claim 6.
Claim 13
Dependent Claim
11 words
An adhesive composition comprising a nonwoven fabric according to claim 6.
Claim 14
Dependent Claim
10 words
A filter comprising a nonwoven fabric according to claim 6.
Claim 15
Dependent Claim
14 words
A filter as in claim 13 which has been treated to form an electret.
Claim 16
Dependent Claim
11 words
A filter as in claim 13 configured as a face mask.
Claim 17
Dependent Claim
14 words
A filter as in claim 15 which has been treated to form an electret.
Claim 18
Dependent Claim
32 words
A nonoriented fiber that comprises discontinuous microfibrils of at least one polymer, copolymer, or terpolymer or metal randomly distributed within a continuous phase of a second and different polymer, copolymer, or terpolymer.
Claim 19
Dependent Claim
32 words
A nonoriented fiber that comprises discontinuous microfibrils of at least one polymer, copolymer, or terpolymer or metal randomly distributed within a continuous phase of a second and different polymer, copolymer, or terpolymer.
Claim 20
Dependent Claim
81 words
A fiber according to claim 17 wherein said polymers, copolymers, or terpolymers are selected from the group consisting of (a) polymers, copolymers, or terpolymers formed from olefins, halogenated-olefins, sulfonated-olefins, acrylic acids and their esters, acrylamides, fumaric acid and its esters, maleic acid and its esters, maleic anhydride, vinyl acetate, vinylpyridine, vinylpyrollidone, and vinylsilanes, (b) polyesters, polyamides, polyimides, polyethers, polyurethanes, polyamines, polysulfides, polyketones, polycarbonates, polysulfones, and polysiloxanes, and (c) salts of said polymers, copolymers, or terpolymers that contain acidic or basic groups.
Claim 21
Dependent Claim
50 words
A fiber according to claim 18 wherein phase comprises a copolymer of an olefin with acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, styrenesulfonic acid, 2-acrylamide-2-propanesulfonic acid, 2-sulfoethylmethacrylate, or an anhydride, an ester, an amide, or a salt thereof and at least one other phase comprises a polyolefin.
Claim 22
Dependent Claim
25 words
A fiber according to claim 18 wherein one phase comprises a polyester or a copolymer thereof and at least one other phase comprises a polyolefin.
Claim 23
Dependent Claim
25 words
A fiber according to claim 18 wherein one phase comprises a polyamide or a copolymer thereof and at least one other phase comprises a polyolefin.
Claim 24
Dependent Claim
20 words
A fiber according to claim 18 wherein one phase comprises a thermotropic (that is, liquid crystal) polymer, copolymer, or terpolymer.
Claim 25
Dependent Claim
17 words
A fiber according to claim 17 wherein the dispersed phase comprises a metal or a metal alloy.
Claim 26
Dependent Claim
12 words
A nonwoven fabric comprising a web of fibers according to claim 17.
Claim 27
Dependent Claim
15 words
A microfibril produced by extracting the continuous phase resin from the fiber of claim 17.
Claim 28
Dependent Claim
14 words
A bundle of microfibrils or a web composed of microfibrils according to claim 25.
Claim 29
Dependent Claim
14 words
An ion exchange or absorptive medium comprising a nonwoven fabric according to claim 24.
Claim 30
Dependent Claim
17 words
A medium for the absorption of solids or liquids comprising a nonwoven fabric according to claim 27.
Claim 31
Dependent Claim
11 words
An adhesive composition comprising a nonwoven fabric according to claim 24.
Claim 32
Dependent Claim
10 words
A filter comprising a nonwoven fabric according to claim 24.
Claim 33
Dependent Claim
14 words
A filter as in claim 30 which has been treated to form an electret.
Claim 34
Dependent Claim
11 words
A filter as in claim 30 configured as a face mask.
Claim 35
Dependent Claim
14 words
A filter as in claim 22 which has been treated to form an electret.
References Cited (Backward Citations)
No citation records indexed.
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