US3853977A - Method for producing mixed filaments - Google Patents

Method for producing mixed filaments Download PDF

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Publication number
US3853977A
US3853977A US00332068A US33206873A US3853977A US 3853977 A US3853977 A US 3853977A US 00332068 A US00332068 A US 00332068A US 33206873 A US33206873 A US 33206873A US 3853977 A US3853977 A US 3853977A
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filaments
polyester
polyamide
composite
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US00332068A
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English (en)
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M Matsui
S Tokura
M Yamabe
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Kanebo Ltd
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Kanebo Ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S57/00—Textiles: spinning, twisting, and twining
    • Y10S57/907—Foamed and/or fibrillated

Definitions

  • ABSTRACT Synthetic fibers having natural fiber-like touch, gloss, texture and appearance are produced by spinning a polyester and a polyamide through a common spinneret simultaneously to form mixed filaments consisting of multisegment-filaments, in each of which the polyester is divided by the polyamide into at least 3 segments, and polyester single component filaments, drawing the mixed filaments and then subjecting the drawn mixed filaments to a false twisting to fibrillate the multisegment filaments.
  • the present invention relates to a method for producing mixed filaments consisting of polyester and polyamide, which have different cross-sectional shapes.
  • polyester or polyamide fibers are excellent in dynamic properties but the fineness and cross-sectional shape of each of the single component filaments are simple and therefore the touch, gloss, texture and appearance thereof are more simple than natural fibers.
  • the filaments of an extremely fine denier and the filaments having a large denier are different in behavior in the spinning step (for example, solidification, speed, and the like), and it is difficult to find out the drawing condition suitable for any filaments in the subsequent drawing step, so that finally filaments poor in the dynamic property are formed.
  • the object of the present invention is to provide a novel method for readily producing the filaments provided with both the preferable properties of synthetic fibers and natural fibers.
  • the present invention consists in a method for producing mixed filaments (D), which comprises spinning a polyester and a polyamide through a common spinneret simultaneously to form an intermediate mixed filament product (C) consisting of multisegment filaments, in each of which the polyester is divided in cross-section by the polyamide into at least 3 segments, and (B) polyester monofilaments, so as to satisfy the following definitions,
  • the ratio of the multisegment filaments (A) to the total mixed filaments (C) is 40-70 percent by weight
  • the ratio of polyamide in each of the multisegment filaments (A) is less than 40 percent by weight, preferably less than 30 percent by weight and the ratio of polyamide in the total mixed filament product (C) is less than 30 percent by weight, preferably less than 25 percent by weight,
  • each multisegment filament (A) forms thin layers having an even thickness which diverge radially in the cross-section of said multisegment filament (A), and
  • each polyester segment in the multisegment filament (A) is less than I denier, preferably less than 0.7 denier and the polyester monofilament (B) is more than 2 deniers, preferably more than 3'deniers,
  • segment used herein means that portion constituting the multisegment filament, which substantially extends evenly along the longitudinal direction of the filament.
  • the term forming the thin layers having an even thickness diverging radially means a thin layer structure extending in ,at least three directions radially from one point, such as the Y-shape as shown in FIG. 1, the X-shape as shown in FIG. 2, and the six branches as shown in FIG. 3.
  • Such radial thin layer structure can be easily formed as mentioned hereinafter and such multisegment filaments can be efficiently separated by a false twisting and easily fibrillated.
  • the inventors have found that when the multisegment filaments polyester single component filaments are simultaneously spun, the features of the above described multisegment filament are maintained and further a moderate resiliency can be obtained.
  • the weight ratio of the multisegment filaments in the total mixed filaments simultaneously spun is 40-70 percent by weight.
  • the ratio of the multisegment filaments is less than 40 percent by weight, the excellent natural fiber-like properties cannot be obtained and when the rate is more than percent by weight, the resulting fibers are too soft and deficient in the dimensional stability. That is, the ratio of the multisegment filaments must be selected within the above range depending upon the object.
  • Polyamide and polyester are different in their shrinkability, and in general polyamide is greater in shrinkage than polyester, that is, polyamide has less dimensional stability than polyester.
  • polyamide has less dimensional stability than polyester.
  • shrinkability increases and may become the same as the shrinkability of polyamide, but yarn breakage occurs in the drawing step, and the drawing becomes unstable.
  • the multisegment filaments are more highly shrunk and cause loose filaments (floating thread) and these filaments are not only entangled on the guide or traveller in the drawing but also cause hindrance in the after-treatments, such as false twisting, warp beaming, warping and the like. Consequently, in order to solve this problem, the ratio of polyamide to the multisegment filament must be decreased.
  • the ratio of polyamide in the multisegment filaments must be less than 40 percent by weight, preferably less than 30 percent by weight and further the ratio of polyamide in the total mixed filaments must be less than 30 percent by weight, preferably less than 25 percent by weight.
  • the polyester and the polyamide are bonded in such a state that the polyamide forms thin layers having a substantially even thickness which diverge radially, in the cross-section of each of the above described multisegment filaments.
  • the filaments having the cross-sections as shown in FIGS. 1 to 4 can be produced while maintaining a very stable bonding form as explained hereinafter.
  • a filament as shown in FIG. 5 in which a component is divided with another component forming very uneven thin layers, is liable to cause aggregation of polymer in the spinning and a slight variation of the melt viscosity of both the components influences upon the bonded shape and it is difficult to produce such a filament having a uniform cross-sectional structure along the longitudinal direction and the'fibrillation of the resulting filament is not effected efficiently.
  • the number of the polyester segments in each of the multisegment filaments is preferred to be 3-8, preferably 3-6.
  • the smallest polyester segment in the multisegment filament must be less than 1 denier.
  • the extremely fine filaments obtained by fibrillation of such a filament have desirable texture, appearance and gloss similar to natural fibers.
  • the multisegment filaments composed of polyester segments having an even crosssection as shown in FIGS. 1 to 3 are useful, but in some cases, the multisegment filament as shown in'FIG. 4, wherein the area and cros-sectional shape of the poly ester segments are different, is preferable, because various forms of fibrils can be formed.
  • polyester filaments spun simultaneously with the multisegment filaments serve to provide the moderate resiliency and excellent dynamic properties, which are characteristics of synthetic fibers, to the resulting fibers and a relatively large fineness, that is more than 2 deniers, usually about 3-10 deniers, is preferred.
  • These mixed filaments can be obtained by producing the multisegment filaments and single component filaments simultaneously and when the separately produced filaments are mixed, both the filaments are not fully entangled. 1
  • FIGS. 1 to 5 show embodiments of cross-sections of filaments
  • FIG. 6 is a vertical cross-sectional view of spinneret which can produce themixed filaments of the present invention
  • FIG. 7 is a cross-sectional view of the spinneret as shown in FIG. 6 in the arrow direction on lines X-X';
  • FIG. 8 is a cross-sectional view of the spinneret as shown in FIG. 6 in the arrow direction on lines Y-Y'.
  • the mixed fibers obtained by the method of the present invention can be produced in a high evenness of the cross-sectional structure by a relatively simple apparatus.
  • an inner spinneret plate is superposed on a spinneret plate 110.
  • a part of the melted polyester is extruded from inner orifices 5 through a supplying chamber 2 and a passage 3 and the melted polyamide is extruded from channels 8 through a supplying chamber 1, passage 6 and a reservoir 7. Both the polymers are bonded at an inlet of a conduit 9 and spun from an orifice 111 through the conduit 9. On the-other hand, a part of the remaining polyester is spun from an orifice 111 through a supplying chamber 2, a passage 4 and a conduit 9.
  • Part number 120 is a supporter.
  • FIG. 7 is a cross-sectional view of the spinneret as shown in FIG. 6 in an arrow direction on lines XX' and shows the bottom of the inner spinneret 100.
  • the inner orifices 5 and the passages 4 are opened at the projecting portion of the bottom of the inner spinneret plate 100 corresponding to the spinning orifices 111 in the spinneret plate 110.
  • the inner orifices 5 consist of four small holes. At the top face of the projecting portion in the bottom of the inner spinneret plate where each of the four small holes opens, channels 8 are provided between the outlets of the adjacent small holes.
  • FIG. 8 is a cross-sectional view of the spinneret as shown in FIG. 6 in an arrow direction on lines YY' and shows the upper face of the spinneret plate provided with circular spinning orifices 111.
  • the spinneret as shown in FIGS. 6 to 8 provides the mixed filaments consisting of 3 multisegment filaments in which polyester is divided with four radially diverged polyamide thin layers into 4 segments and 3 polyester monofilaments.
  • non-circular cross-sectional filament By using a non-circular cross-sectional spinning orifice, non-circular cross-sectional filament can be easily obtained.
  • the cross-section of the filament is preferred to be substantially circular.
  • the deniers of the multisegment filaments and the polyester single component filament may be either the same or different, but when both the filaments have the same denier, thefilaments having improved dynamic properties are apt to be obtained.
  • the denier ratio of both the filaments is preferred to be about /7-7/10. A given value of the denier ratio of both the filaments can be obtained by selecting the diameter or length of the orifice 111.
  • the segments in the multisegment filaments are separated into fibrils and the polyester single component filaments and the fibrillated segments are fully entangled to form the desired mixed filaments.
  • false twisting means that the filaments are twisted and then partially untwisted.
  • the false twisting includes a usual false twisting (abbreviated to as FT process) wherein twisting and untwisting are effected continuously and a process wherein after twisting, twisting in the reverse direction is made (referred to as multi-step process).
  • FT process is preferred in view of the working efficiency and therefore an explanation will be made with respect to this process.
  • the object of the false twisting lies in fibrillation of the multisegment filament as mentioned above.
  • the multisegment filament is readily fibrillated and therefore 'it is not necessary to determine the number of twistings (when a spindle is used, rotation number of spindle/yarn velocity) exactly as in the usual twisting.
  • the twisting may be effected at room temperature (for example, 20C) or by heating (for example, 190C) and the feed ratio (velocity of feed roller/velocity of delivery roller) may be 0.8-2.0.
  • FT process may be effected more than two times and further after the false twisting by FT process, a heat-setting and conventional twisting may be effected.
  • This process may combine two steps of twisting-reverse twisting. three steps oftwisting-heat settingrcverse twisting. four steps of twisting-heat settin' g-reverse twisting-heat setting or may combine further many steps.
  • the number of twists for effecting fibrillation (usually the first step) is the same as in the above described FT process.
  • the number of twists in the reverse direction effected thereafter may be the same as or different from the original number of twists but is preferred to be at least 50, preferably at least 70 percent of the original number of twists.
  • the fibers are actually twisted and the number of actual twists and the direction thereof can be selected depending upon the object.
  • the false twisting effected in FT process may be carried out by a conventional false twisting machine provided with a false twisting portion consisting of a spindle between a feed roller and a delivery roller and a heating portion consisting of an electric heater or may be carried out by providing a false twisting portion between a delivery roller of a drawing apparatus and a winding up appartus to effect the drawing and false twisting continuously.
  • a spindle a means for applying false twists to filaments directly by contacting the filaments with a rotating roller, that is a means for applying twists directly by a friction and air jet type means which applies false twists to filaments by a rotating flow of compressed air.
  • heating portion use may be made of conventional plate-shaped or tube-shaped heating elements but as mentioned above. Any heating element may not be used depending upon the purpose.
  • conventional twisters double twister, uptwister and the like
  • the heat-setting may be effected by the following means. That is, a bobbin wound with filaments is heated with steam or hot water or the running filament is heated by a metal heater or a heater tube. By the method of the present invention, various fibers can be obtained.
  • polyesters to be used in the present invention mention may be made of polyethylene therephthalate, polyethylene oxybenzoate, polytetramethylene terephthalate, polydimethylcyclohexane terephthalate, polypivalolactone and copolyesters containing the components of these polyesters.
  • nylon 6 nylon 66
  • nylon l l polymethaxylene adipamide
  • copolymers containing the components of these polyamides mention maybe made of nylon 6, nylon 66, nylon l l, polymethaxylene adipamide and copolymers containing the components of these polyamides.
  • polyester and polyamide to be used in the present invention can be selected optionally depending upon the object but when highly crimped filaments are to be obtained by applying false twists, it is preferred to combine polyester and polyamide, which are equal in the appropriate false twisting conditions, for example, a combination of polyethylene terephthalate and nylon 66.
  • EXAMPLE 1 By using the spinneret as shown in FIG. 6, provided that 18 orifices 111 are arranged in a circumference of a spinneret plate 110 and 9 groups of inner orificies 5 and channels 8, and 9 passages 4 are opened on the bottom of the inner spinneret alternately corresponding to the orifices 111, polyethylene terephthalate (PET) having an intrinsic viscosity of 0.71 in ochlorophenol solution at 30C and polyhexamethylene adipamide (nylon 66) having an intrinsic viscosity of 1.05 in metacresol at 30C are melted separately and the melted PET and the melted nylon 66 are supplied to a supplying chamber 2 and a supplying chamber 1 in a weight ratio 7/1 by metering pump respectively.
  • PET polyethylene terephthalate
  • nylon 66 polyhexamethylene adipamide
  • the temperature of the spinneret is maintained at 290C and both the melted polymers are spun from circular orifices, each having a diameter of 0.25 mm, and cooled in air and the spun filaments are wound up at a velocity of 700 m/min, while oiling, drawn to 3.6 times on a drawing pin at C, and wound up while contacting with a metal plate at C for about 0.l sec. to obtain drawn yarns of 75 denier/l8 filament, which is referred to as yarn F
  • the yarn F is composed of 9 polyester single component filaments and 9 multisegment filaments having the cross-section as shown in FIG. 2 wherein PET is divided bythin layers of nylon 66 into 4 segments and 4 segments are uniformly dispersed (conjugate ratio of PET/nylon 66 being 3/1).
  • the multisegment filament and the polyester single component filament are separately spun and drawn.
  • PET and nylon 66 are spun and drawn in the same manner as in the production of yarn F provided that the feed ratio of PET/nylon 66 is 3/1 by weight, whereby multisegment filament of 75 denier/18 filamentare obtained, which is referred to'as yarn F
  • PET is spun in a conventional process to form PET filaments having 75 denier/l8 filament, which is referred to as yarn F
  • Yarns F F and F are false twisted and then fed into a metal tube heater having an inner diameter of 3 mm and a length of 50 cm heated at 215C and taken out at a rate of 60 m/min through a spindle rotating at 200,000 rpm and wound up at a rate of 55 m/min.
  • the yarns F and F are com- 'pletely fibrillated and in the yarn F, the fibrillated segments and the polyester single component filaments are thoroughly entangled and dispersed homogeneously, each of the above false twisted yarns is S-twisted and Z-twisted and these twisted yarns are mixed and then formed into a plain knitted goods by a circular knitting machine of gauge and these knitted goods are refined, dyed and steam set to form suit cloths.
  • the conjugate ratio is 3/1, that is when the rate of polyamide in the multisegment filament is 25 percent, the amount of the loose filaments is small and there is no hindrance in the following step.
  • the yarn ofa conjugate ratio of 4/1 wherein the rate of polyamide in the multisegment filament is 20 percent there is no loose filament.
  • EXAMPLE 3 epolycaproamide (nylon 6, intrinsic viscosity in the metacresol solution at 30C being 1.1) and PET are spun and drawn in the same manner as described in Example l in a feed ratio of PET/nylon 6 being 9/1 to obtain yarn P of 75 denier/18 filament.
  • the resulting yarn F is false twisted.
  • Thethus treated yarns are fed at a rate of 60 m/min without using a heater and taken out at a rate of 60 m/min through a false twisting spindle rotating at 1,900,000 rpm and wound up at a rate of 61.2 m/min.
  • the multisegment filaments in the yarn F after the false twisting are fibrillated.
  • the yarn F after the false twisting is not substantially crimped and is flexible and has a moderate resiliency and shows silk-like gloss.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US00332068A 1972-02-24 1973-02-13 Method for producing mixed filaments Expired - Lifetime US3853977A (en)

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US478064A US3916611A (en) 1972-02-24 1974-06-10 Mixed filament yarn

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216264A (en) * 1977-08-08 1980-08-05 Kanebo, Ltd. Conductive composite filaments
US4361609A (en) * 1978-03-03 1982-11-30 Akzona Incorporated Fiber structures of split multicomponent fibers and process therefor
US4364983A (en) * 1979-03-02 1982-12-21 Akzona Incorporated Multifilament yarn of individual filaments of the multicomponent matrix/segment type which has been falsetwisted, a component thereof shrunk, a component thereof heatset; fabrics comprising said
US4369156A (en) * 1979-02-27 1983-01-18 Akzona Incorporated Process for the preparation of fibrillated fiber structures
US4381274A (en) * 1978-01-25 1983-04-26 Akzona Incorporated Process for the production of a multicomponent yarn composed of at least two synthetic polymer components
US4460649A (en) * 1981-09-05 1984-07-17 Kolon Industries Inc. Composite fiber
WO1984003055A1 (en) 1983-02-07 1984-08-16 Univ Yale Transfer of macromolecules from a chromatographic substrate to an immobilizing matrix
US5047189A (en) * 1990-05-11 1991-09-10 Nan Ya Plastics Corporation Process for preparing partially dissolvable and splittable conjugated microfiber
US5759926A (en) * 1995-06-07 1998-06-02 Kimberly-Clark Worldwide, Inc. Fine denier fibers and fabrics made therefrom
US5783503A (en) * 1996-07-22 1998-07-21 Fiberweb North America, Inc. Meltspun multicomponent thermoplastic continuous filaments, products made therefrom, and methods therefor
US5919410A (en) * 1994-11-29 1999-07-06 Jeng; Meng-Song Method of fiber splitting for conjugated fiber
CN1105198C (zh) * 1997-11-05 2003-04-09 佩得克斯有限公司 用于和用来制造鬃毛或齿间清洁器的单丝、以及由这种鬃毛制成的鬃毛制品和齿间清洁器
US20030139110A1 (en) * 1998-01-30 2003-07-24 Kouichi Nagaoka Staple fiber non-woven fabric and process for producing the same
US6624100B1 (en) 1995-11-30 2003-09-23 Kimberly-Clark Worldwide, Inc. Microfiber nonwoven web laminates

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581221B2 (ja) * 1974-12-12 1983-01-10 帝人株式会社 シカガワヨウヘンシヨクブツノ セイゾウホウホウ
DE2858174C2 (en]) * 1978-03-03 1988-06-16 Akzo Gmbh, 5600 Wuppertal, De
DE2908101A1 (de) * 1979-03-02 1980-09-11 Akzo Gmbh Multifiler faden aus einzelfilamenten des mehrkomponenten-matrix-segmenttypus
KR920005730B1 (ko) * 1990-03-30 1992-07-16 동양나이론주식회사 분할형 복합사
US6506327B2 (en) 1997-11-05 2003-01-14 Pedex & Co. Gmbh Process of making monofilaments
DE19841974A1 (de) 1998-09-14 2000-03-23 Braun Gmbh Borste für eine Zahnbürste, insbesondere für eine elektrische Zahnbürste, sowie Verfahren zu deren Herstellung

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US3422616A (en) * 1964-12-15 1969-01-21 Rhodiaceta Manufacture of threads,cords,ropes and like articles
DE2117076A1 (de) * 1970-04-07 1971-11-04 Kanegafuchi Boseki K.K., Tokio Verfahren und Vorrichtung zur Herstellung von aus mehreren Segmenten bestehenden Fäden
US3627868A (en) * 1968-05-24 1971-12-14 Takaji Funahashi Method of producing nibs for writing instruments
US3639556A (en) * 1967-12-21 1972-02-01 Kanegafuchi Spinning Co Ltd Method for spinning composite filaments
US3672802A (en) * 1967-03-15 1972-06-27 Kanegafuchi Spinning Co Ltd Apparatus for producing multilayer filament
US3705226A (en) * 1969-07-09 1972-12-05 Toray Industries Artificial leather and a method of manufacturing the same
US3718534A (en) * 1969-03-26 1973-02-27 Toray Industries Spontaneously crimping synthetic composite filament and process of manufacturing the same
US3725192A (en) * 1967-02-25 1973-04-03 Kanegafuchi Spinning Co Ltd Composite filaments and spinneret and method for producing same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422616A (en) * 1964-12-15 1969-01-21 Rhodiaceta Manufacture of threads,cords,ropes and like articles
US3725192A (en) * 1967-02-25 1973-04-03 Kanegafuchi Spinning Co Ltd Composite filaments and spinneret and method for producing same
US3672802A (en) * 1967-03-15 1972-06-27 Kanegafuchi Spinning Co Ltd Apparatus for producing multilayer filament
US3639556A (en) * 1967-12-21 1972-02-01 Kanegafuchi Spinning Co Ltd Method for spinning composite filaments
US3627868A (en) * 1968-05-24 1971-12-14 Takaji Funahashi Method of producing nibs for writing instruments
US3718534A (en) * 1969-03-26 1973-02-27 Toray Industries Spontaneously crimping synthetic composite filament and process of manufacturing the same
US3705226A (en) * 1969-07-09 1972-12-05 Toray Industries Artificial leather and a method of manufacturing the same
DE2117076A1 (de) * 1970-04-07 1971-11-04 Kanegafuchi Boseki K.K., Tokio Verfahren und Vorrichtung zur Herstellung von aus mehreren Segmenten bestehenden Fäden

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216264A (en) * 1977-08-08 1980-08-05 Kanebo, Ltd. Conductive composite filaments
US4309479A (en) * 1977-08-08 1982-01-05 Kanebo, Ltd. Conductive composite filaments
US4381274A (en) * 1978-01-25 1983-04-26 Akzona Incorporated Process for the production of a multicomponent yarn composed of at least two synthetic polymer components
US4396366A (en) * 1978-01-25 1983-08-02 Akzona Incorporated Device for the production of a multicomponent yarn composed of at least two synthetic polymer components
US4361609A (en) * 1978-03-03 1982-11-30 Akzona Incorporated Fiber structures of split multicomponent fibers and process therefor
US4369156A (en) * 1979-02-27 1983-01-18 Akzona Incorporated Process for the preparation of fibrillated fiber structures
US4364983A (en) * 1979-03-02 1982-12-21 Akzona Incorporated Multifilament yarn of individual filaments of the multicomponent matrix/segment type which has been falsetwisted, a component thereof shrunk, a component thereof heatset; fabrics comprising said
US4460649A (en) * 1981-09-05 1984-07-17 Kolon Industries Inc. Composite fiber
WO1984003055A1 (en) 1983-02-07 1984-08-16 Univ Yale Transfer of macromolecules from a chromatographic substrate to an immobilizing matrix
US5047189A (en) * 1990-05-11 1991-09-10 Nan Ya Plastics Corporation Process for preparing partially dissolvable and splittable conjugated microfiber
US5919410A (en) * 1994-11-29 1999-07-06 Jeng; Meng-Song Method of fiber splitting for conjugated fiber
US5759926A (en) * 1995-06-07 1998-06-02 Kimberly-Clark Worldwide, Inc. Fine denier fibers and fabrics made therefrom
US6624100B1 (en) 1995-11-30 2003-09-23 Kimberly-Clark Worldwide, Inc. Microfiber nonwoven web laminates
US5783503A (en) * 1996-07-22 1998-07-21 Fiberweb North America, Inc. Meltspun multicomponent thermoplastic continuous filaments, products made therefrom, and methods therefor
CN1105198C (zh) * 1997-11-05 2003-04-09 佩得克斯有限公司 用于和用来制造鬃毛或齿间清洁器的单丝、以及由这种鬃毛制成的鬃毛制品和齿间清洁器
US20030139110A1 (en) * 1998-01-30 2003-07-24 Kouichi Nagaoka Staple fiber non-woven fabric and process for producing the same
US20060030230A1 (en) * 1998-01-30 2006-02-09 Unitika Ltd. Staple fiber non-woven fabric and process for producing the same

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GB1393351A (en) 1975-05-07
DE2307324A1 (de) 1973-09-06
JPS4887119A (en]) 1973-11-16

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