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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0975484 (2010-12-22) |
등록번호 | US-8691130 (2014-04-08) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 0 인용 특허 : 423 |
Disclosed are multicomponent fibers derived from a blend of a sulfopolyester with a water non-dispersible polymer wherein the as-spun denier is less than about 6 and wherein the water dispersible sulfopolyester exhibits a melt viscosity of less than 12,000 poise measured at 240° C. at a strain rate
Disclosed are multicomponent fibers derived from a blend of a sulfopolyester with a water non-dispersible polymer wherein the as-spun denier is less than about 6 and wherein the water dispersible sulfopolyester exhibits a melt viscosity of less than 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, and wherein the sulfopolyester comprising less than about 25 mole % of residues of at least one sulfomonomer, based on the total moles of diacid or diol residues. The multicomponent fiber is capable of being drawn at a relatively high fiber speed, particularly at least about 2000 m/min, and may be used to produce microdenier fibers. Fibrous articles may be produced from the multicomponent fibers and microdenier fibers. Also disclosed is a process for multicomponent fibers, nonwoven fabrics, and microdenier webs.
1. A process for making at least one multicomponent fiber comprising: spinning at least one water dispersible sulfopolyester and at least one water non-dispersible polymer immiscible with said sulfopolyester to produce said multicomponent fiber, wherein said multicomponent fiber has a side by side c
1. A process for making at least one multicomponent fiber comprising: spinning at least one water dispersible sulfopolyester and at least one water non-dispersible polymer immiscible with said sulfopolyester to produce said multicomponent fiber, wherein said multicomponent fiber has a side by side cross section; wherein said water dispersible sulfopolyester exhibits a glass transition temperature (Tg) of at least 40° C. and a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, and wherein said sulfopolyester comprises less than about 25 mole % of residues of at least one sulfomonomer, based on the total moles of diacid or diol residues. 2. The process according to claim 1 wherein said multicomponent fiber comprises a plurality of segments comprising at least one water-nondispersible polymer immiscible with said sulfopolyester; wherein said segments are substantially isolated from each other by said sulfopolyester intervening between said segments. 3. The process according to claim 1 wherein said sulfopolyester comprises: (A) residues of one or more dicarboxylic acids;(B) about 5 to about 20 mole % 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 said functional groups are hydroxyl, carboxyl, or a combination thereof;(C) 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(D) 0 to about 20 mole %, based on the total repeating units, of residues of at least one branching monomer having 3 or more functional groups wherein said functional groups are hydroxyl, carboxyl, or a combination thereof. 4. The process according to claim 1 comprising contacting said multicomponent fiber with water having a temperature of at least about 45° C. 5. The process according to claim 1 wherein said water non-dispersible polymer is selected from polyolefins, polyesters, polyamides, polylactides, polycaprolactones, polycarbonates, polyurethanes, polyvinyl chlorides, cellulose esters, and combinations thereof. 6. The process according to claim 1 wherein said water non-dispersible polymer is biodistintegratable as determined by DIN Standard 54900 or biodegradable as determined by ASTM Standard Method, D6340-98. 7. The process according to claim 1 wherein said water non-dispersible polymer is an aliphatic-aromatic polyester.
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