Nonwovens produced from multicomponent fibers
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D02G-003/00
D04H-001/00
D04H-013/00
출원번호
US-0053615
(2011-03-22)
등록번호
US-8178199
(2012-05-15)
발명자
/ 주소
Gupta, Rakesh Kumar
Mitchell, Melvin Glenn
Klosiewicz, Daniel William
출원인 / 주소
Eastman Chemical Company
대리인 / 주소
Owen, Polly C.
인용정보
피인용 횟수 :
13인용 특허 :
341
초록▼
A water non-dispersible polymer microfiber is provided comprising at least one water non-dispersible polymer wherein the water non-dispersible polymer microfiber has an equivalent diameter of less than 5 microns and length of less than 25 millimeters. A process for producing water non-dispersible po
A water non-dispersible polymer microfiber is provided comprising at least one water non-dispersible polymer wherein the water non-dispersible polymer microfiber has an equivalent diameter of less than 5 microns and length of less than 25 millimeters. A process for producing water non-dispersible polymer microfibers is also provided, the process comprising: a) cutting a multicomponent fiber into cut multicomponent fibers; b) contacting a fiber-containing feedstock with water to produce a fiber mix slurry; wherein the fiber-containing feedstock comprises cut multicomponent fibers; c) heating the fiber mix slurry to produce a heated fiber mix slurry; d) optionally, mixing the fiber mix slurry in a shearing zone; e) removing at least a portion of the sulfopolyester from the multicomponent fiber to produce a slurry mixture comprising a sulfopolyester dispersion and water non-dispersible polymer microfibers; and f) separating the water non-dispersible polymer microfibers from the slurry mixture. A process for producing a nonwoven article is also provided.
대표청구항▼
1. A water non-dispersible short-cut polymer microfiber comprising at least one water non-dispersible polymer wherein said water non-dispersible short-cut polymer microfiber has a fineness of 0.5 d/f or less and a length of 12 millimeters or less. 2. A water non-dispersible short-cut polymer microfi
1. A water non-dispersible short-cut polymer microfiber comprising at least one water non-dispersible polymer wherein said water non-dispersible short-cut polymer microfiber has a fineness of 0.5 d/f or less and a length of 12 millimeters or less. 2. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said water non-dispersible short-cut polymer microfiber has a fineness of 0.1 d/f or less. 3. A water non-dispersible short-cut polymer microfiber according to claim 1 or 2 produced by the process comprising: a) providing a short-cut multicomponent fiber having a shaped cross section, said multicomponent fiber comprising: at least one water dispersible sulfopolyester; anda plurality of microfiber domains comprising one or more water non-dispersible polymers immiscible with said sulfopolyester, wherein said microfiber domains are substantially isolated from each other by said sulfopolyester intervening between said microfiber domains; andb) separating the water non-dispersible short-cut polymer microfiber from said water dispersible sulfopolyester. 4. A water non-dispersible short-cut polymer microfiber according to claim 3 wherein said short-cut multicomponent fiber has a shaped cross section, comprising: (A) at least one water dispersible sulfopolyester; and(B) a plurality of microfiber domains comprising one or more water non-dispersible polymers immiscible with the sulfopolyester, wherein the microfiber domains are substantially isolated from each other by the sulfopolyester intervening between the microfiber domains, wherein the water dispersible sulfopolyesters exhibits a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, and wherein the sulfopolyester comprises less than about 25 mole % of residues of at least one sulfomonomer, based on the total moles of diacid or diol residues. 5. A water non-dispersible short-cut polymer microfiber according to claim 3 wherein said short-cut multicomponent fiber has a shaped cross section, comprising: (A) a water dispersible sulfopolyester having a glass transition temperature (Tg) of at least 57° C., the sulfopolyester comprising: (i) residues of one or more dicarboxylic acids;(ii) about 4 to about 40 mole %, based on the total repeating units, of residues of at least one sulfomonomer having 2 functional groups and one or more sulfonate groups attached to an aromatic or cycloaliphatic ring wherein the functional groups are hydroxyl, carboxyl, or a combination thereof;(iii) one or more diol residues wherein at least 25 mole %, based on the total diol residues, is a poly(ethylene glycol) having a structure H—(OCH2—CH2)n—OHwherein n is an integer in the range of 2 to about 500; and (iv) 0 to about 25 mole %, based on the total repeating units, of residues of a branching monomer having 3 or more functional groups wherein the functional groups are hydroxyl, carboxyl, or a combination thereof; and(B) a plurality of microfiber domains comprising one or more water non-dispersible polymers immiscible with the sulfopolyester, wherein the microfiber domains are substantially isolated from each other by the sulfopolyester intervening between the microfiber domains. 6. A water non-dispersible short-cut polymer microfiber according to claim 3 wherein said short-cut multicomponent fiber has a shaped cross section, comprising: (A) at least one water dispersible sulfopolyester; and(B) a plurality of microfiber domains comprising one or more water non-dispersible polymers immiscible with the sulfopolyester, wherein the microfiber domains are substantially isolated from each other by the sulfopolyester intervening between the microfiber domains,wherein the multicomponent fiber has an as-spun denier of less than about 6 denier per filament; andwherein the water dispersible sulfopolyesters exhibit a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, and wherein the sulfopolyester comprises less than about 25 mole % of residues of at least one sulfomonomer, based on the total moles of diacid or diol residues. 7. A nonwoven article comprising said water non-dispersible short-cut polymer microfiber of claim 1 or 2. 8. A nonwoven article of claim 7 wherein said nonwoven article is produced by a dry-laid process or wet-laid process. 9. A nonwoven article of claim 8 wherein at least 1% of said water non-dispersible short-cut polymer microfiber is contained in the nonwoven article. 10. A nonwoven article of claim 8 where at least 25% of said water non-dispersible short-cut polymer microfiber is contained in the nonwoven article. 11. A nonwoven article of claim 8 wherein at least 50% of said water non-dispersible short-cut polymer microfiber is contained in the nonwoven article. 12. A nonwoven article according to claim 7 wherein said water non-dispersible short-cut polymer microfiber comprises at least one polymer selected from the group consisting of polyolefins, polyesters, polyamides, polylactides, polycaprolactone, polycarbonate, polyurethane, and polyvinyl chloride. 13. A nonwoven article according to claim 7 wherein said nonwoven article is an article selected from the group consisting of filter media for air filtration, filter media for water filtration, filter media for bodily fluid filtration, filter media for solvent filtration, filter media for hydrocarbon filtration, filter media for paper making processes, nonwoven fabrics, nonwoven webs, wet-laid webs, dry-laid webs, melt blown webs, spunbonded webs, thermobonded webs, hydroentangled webs, artificial leathers, suedes, cleaning wipes, multilayer nonwovens, laminates, composites, gauzes, bandages, diapers, training pants, tampons, surgical gowns, surgical masks, feminine napkins, replacement inserts for personal hygiene products, replacement inserts for cleaning products, filter media for food preparation, filter media for medical applications, and paper products. 14. A nonwoven article according to claim 7 further comprising at least one other fiber. 15. A nonwoven article according to claim 7 further comprising at least one additive. 16. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said short-cut polymer microfiber is a monocomponent microfiber. 17. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said short-cut polymer microfiber is cut to a length of ⅛ inch or less. 18. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said short-cut polymer microfiber is cut to a length of about ⅛ inch. 19. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said short-cut polymer microfiber is cut to a length of ⅛ inch. 20. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said water non-dispersible polymer microfiber comprises at least one polymer selected from the group consisting of polyolefins, polyesters, polyamides, polylactides, polycaprolactone, polycarbonate, polyurethane, and polyvinyl chloride. 21. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said water non-dispersible polymer microfiber comprises at least one polymer selected from the group consisting of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), homo- and copolymers of polyethylene, homo- and copolymers of polypropylene, and nylon-6. 22. A water non-dispersible short-cut polymer microfiber according to claim 1 wherein said water non-dispersible polymer microfiber comprises polyethylene terephthalate (PET). 23. A water non-dispersible polymer short-cut microfiber according to claim 1 produced by the process comprising: (A) forming a multicomponent fiber comprising a water dispersible component and a water non-dispersible component,(B) cutting said multicomponent fiber to short-cut length to thereby produce a short-cut multicomponent fiber, wherein said short-cut length is 12 millimeters or less; and(C) removing said water dispersible component from said short-cut multicomponent fiber to thereby release said water non-dispersible short-cut polymer microfiber having said short-cut length. 24. A water non-dispersible short-cut polymer microfiber according to claim 23 wherein said water non-dispersible component comprises a plurality of individual segments that are substantially isolated from one another by said water dispersible component. 25. A water non-dispersible short-cut polymer microfiber according to claim 23 wherein said multicomponent fiber has an islands-in-the-sea, sheath core, side-by-side, or segmented pie configuration. 26. A water non-dispersible short-cut polymer microfiber according to claim 23 wherein said multicomponent fiber has an islands-in-the-sea configuration. 27. A water non-dispersible short-cut polymer microfiber according to claim 23 wherein said water dispersible component comprises a sulfopolyester. 28. A water non-dispersible short-cut polymer microfiber according to claim 27 wherein said sulfopolyester exhibits a glass transition temperature of at least 40° C. 29. A water non-dispersible short-cut polymer microfiber according to claim 28 wherein said sulfopolyester exhibits a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec. 30. A nonwoven article according to claim 7 wherein said water non-dispersible short-cut polymer microfiber comprises cellulose ester. 31. A nonwoven article according to claim 9 wherein said water non-dispersible short-cut polymer microfiber has an equivalent diameter of less than 5 microns and a length of 12 millimeters or less. 32. A nonwoven article according to claim 9 wherein said water non-dispersible short-cut polymer microfiber has an equivalent diameter of less than 3 microns and a length of less than 10 millimeters. 33. A nonwoven article according to claim 9 wherein said water non-dispersible short-cut polymer microfiber has a length of less than 6.5 millimeters. 34. A nonwoven article according to claim 9 wherein said water non-dispersible short-cut polymer microfiber has a length of less than 3.5 millimeters.
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이 특허에 인용된 특허 (341)
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Clark, Mark Dwight; Dema, Keh; Sohn, Sungkyun; Smith, Ernest Phillip; Anderson, Chris Delbert; Everett, Charles Stuart, Paper and nonwoven articles comprising synthetic microfiber binders.
Clark, Mark Dwight; Dema, Keh; Sohn, Sungkyun; Smith, Ernest Phillip; Anderson, Chris Delbert; Everett, Charles Stuart, Process for making paper and nonwoven articles comprising synthetic microfiber binders.
Gupta, Rakesh Kumar; George, Scott Ellery; Klosiewicz, Daniel William; Seo, Kab Sik; Fleenor, Coralie McKenna; Crain, Allen Lynn, Process of making water-dispersible multicomponent fibers from sulfopolyesters.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J.; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, David J.; Tremaine, Dustin A., Processes to produce short-cut microfibers.
Gupta, Rakesh Kumar; Mitchell, Melvin Glenn; Klosiewicz, Daniel William; Clark, Mark Dwight; Anderson, Chris Delbert; Mitchell, Marvin Lynn; Mitchell, Paula Hines; Wolfe, Amber Layne, Wet-Laid process to produce a bound nonwoven article.
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