US20160265141A1 - Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers - Google Patents

Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers Download PDF

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Publication number
US20160265141A1
US20160265141A1 US15/028,022 US201415028022A US2016265141A1 US 20160265141 A1 US20160265141 A1 US 20160265141A1 US 201415028022 A US201415028022 A US 201415028022A US 2016265141 A1 US2016265141 A1 US 2016265141A1
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US
United States
Prior art keywords
hollow
opening
fiber
segment
crimping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/028,022
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English (en)
Inventor
Erwin Glawion
Horst Finder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Truetzschler GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Truetzschler GmbH and Co KG filed Critical Truetzschler GmbH and Co KG
Assigned to TRüTZSCHLER GMBH & CO. KG reassignment TRüTZSCHLER GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GLAWION, ERWIN, FINDER, HORST
Assigned to OERLIKON TEXTILE GMBH & CO. KG reassignment OERLIKON TEXTILE GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRUETZSCHLER GMBH & CO. KG
Publication of US20160265141A1 publication Critical patent/US20160265141A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/32—Side-by-side structure; Spinnerette packs therefor

Definitions

  • the invention relates to a spinneret for extruding hollow fibers, a self-crimping hollow fiber, and a method for producing self-crimping hollow fibers.
  • self-crimping hollow fibers which are extruded by means of a spinneret.
  • spinnerets comprising capillaries, wherein each capillary comprises a C-shaped opening. From said C-shaped opening, a hollow fiber profile will be extruded. After exiting from the opening, the ends of the extruded C-shaped hollow-fiber profile will become bonded to each other in the form of a hollow-fiber wall portion by fusion and will form a hollow fiber having a hollow-fiber wall. After the drafting of the hollow fibers, these will become crimped three-dimensionally under the effect of the spin orientations that have been generated. Further, such self-crimping hollow fibers can be generated by additional introduction of two melt flows which again will result in spin orientations. These fibers have a distinctly higher crimping intensity but require systems engineering of a distinctly more complex type and, thus, higher investment.
  • the invention provides, according to one embodiment, a spinneret, wherein the spinneret comprises at least one capillary having a segmented opening, which has at least two opening segments spaced apart from each other in cross-section, wherein a first opening segment of said at least two opening segments has a first opening-segment width and a second opening segment of said at least two opening segments has a second opening-segment width, the second opening-segment width being wider than the first opening-segment width.
  • melt flows of different magnitudes will flow through the capillaries, thus generating a hollow fiber having asymmetrically shaped hollow-fiber walls with different wall thicknesses and curvatures and with different spin orientations.
  • the hollow fibers produced in this manner have a very high crimping intensity after drafting.
  • the opening-segment width of the second opening segment may be at least 10% and at least 20% wider than the opening-segment width of the first opening segment.
  • the opening-segment width of the second opening segment may be 10% to 50% and in particular 20% to 40% wider than the opening-segment width of the first opening segment. Differences in the opening-segment width in these ranges have the advantage that there will be produced hollow fibers with particularly high crimping intensities.
  • the opening segments can be round in an arcuate shape but can also be oval or angled.
  • the at least two opening segments can each have a substantially semicircular shape.
  • the respective opening segments can comprise two longitudinal sides and two transverse sides, wherein the distance between the transverse sides of the mutually adjacent opening segments is selected in such a manner that the hollow-fiber wall portions extruded from the opening segments will be fused to each other on the transverse sides after exiting from the opening segments.
  • the opening-segment width of the respective opening segments may be constant, i.e. it will remain the same.
  • segmented openings comprising at least three or at least four opening segments, wherein, in such a case, there are provided at least a first and a second opening segment which have different opening-segment widths.
  • a hollow fiber comprising a hollow-fiber wall extruded by a spinneret, wherein the hollow-fiber wall in cross section comprises at least two hollow-fiber wall portions
  • a first one of said at least two hollow-fiber wall portions has a first wall thickness
  • a second one of said at least two hollow-fiber wall portions has a second wall thickness, the second wall thickness being larger than the first wall thickness
  • a produced hollow fiber of the above type is a self-crimping hollow fiber.
  • the at least two hollow-fiber wall portions can each have a constant wall thickness across the respective hollow-fiber wall portion, i.e. they each have an unvarying wall thickness.
  • the first hollow-fiber wall portion can have a constant wall thickness.
  • the second hollow-fiber wall portion can have a constant wall thickness.
  • the first hollow-fiber wall portion and the second hollow-fiber wall portion may be connected to each other by fusion. This means that the at least two hollow-fiber wall portions are respectively connected by fusion with the adjacent hollow-fiber wall portions.
  • the wall thickness of the second hollow-fiber wall portion can be by at least 10% and preferably at least 20% larger than the wall thickness of the first hollow-fiber wall portion.
  • the wall thickness of the second hollow-fiber wall portion can be by 10% to 50% and preferably by 20% to 40% larger than the wall thickness of the first hollow-fiber wall portion. With such wall thickness ratios, the hollow-fiber wall portions have particularly good crimping intensities.
  • the first hollow-fiber wall portion and the second hollow-fiber wall portion can be made of the same material.
  • the hollow fiber can thus be a mono-component hollow fiber.
  • the first hollow-fiber wall portion and the second hollow-fiber wall portion can be made of different materials.
  • the hollow fiber can thus also be a bi-component hollow fiber.
  • the hollow-fiber wall portions can be curved, wherein the second hollow-fiber wall portion can have a stronger curvature than the first hollow-fiber wall portion.
  • a hollow fiber comprising two hollow-fiber wall portions may have a “D”-shaped cross section.
  • hollow fibers comprising three or at least four hollow-fiber wall portions can be provided.
  • a method for producing hollow fibers by a spinneret comprising the following method steps:
  • the hollow fiber can be heated whereby the crimping intensity will be further enhanced by post-shrinkage.
  • the fusion-connected hollow fiber can be cooled and drafted.
  • the undrafted hollow fiber preferably is still straight while, after drawing or drafting, the hollow fibers will be crimped.
  • FIG. 1 shows a device for producing spinning fibers
  • FIG. 2 is a bottom view of a spinneret
  • FIG. 3 shows a segmented opening of the capillary
  • FIG. 4 a is a cross-sectional view of a furnished hollow fiber
  • FIG. 4 b is a cross-sectional view of a hollow fiber
  • FIGS. 5 a -5 d are comparative views illustrating crimping intensities of different hollow fibers.
  • FIG. 1 shows a device for producing spinning fibers.
  • polymeric material can be arranged in a container 8 .
  • the polymeric material can be molten in a melting device 4 .
  • this molten material will be pressed through capillaries.
  • the melt will be pressed through the capillaries and be withdrawn in the form of filaments and respectively fibers.
  • the filaments will be cooled in a blow-out hopper, not shown, in the region 12 and then can be wound onto drums or placed in vessels at a constant speed.
  • the filaments can then directly or later be drafted in drafting devices 12 , 14 .
  • the filaments are hollow fibers 2 .
  • the spinneret 1 is shown in greater detail from below.
  • the spinneret comprises a plurality of capillaries 18 .
  • the capillaries 18 are the nozzle holes.
  • the capillary 18 comprises at least one segmented opening 16 .
  • the segmented opening 16 comprises, when seen in cross section, at least two mutually spaced opening segments 20 , 22 .
  • the spinneret comprises a plurality of capillaries, each of them adapted to extrude hollow fibers from it.
  • the respective capillaries are of identical design so that a plurality of identical hollow fibers can be extruded.
  • the segmented opening 16 of capillary 18 as shown in detail in FIG. 3 comprises mutually spaced opening segments 20 , 22 .
  • the first opening segment 22 of the at least two opening segments 20 , 22 has a first opening-segment width 32 .
  • the opening-segment width is preferably determined in the radial direction of opening 16 .
  • the second opening segment 20 of the at least two opening segments 20 , 22 has a second opening-segment width 34 .
  • the second opening-segment width 34 is wider than the first opening-segment width 32 .
  • the opening-segment width 34 of the second opening segment 20 is by at least 10%, preferably at least 20% wider than the opening-segment width 32 of the first opening segment 22 .
  • the opening-segment width 34 of the second opening segment 20 is by 10% to 50%, preferably 20% to 40% wider than the opening-segment width 32 of the first opening segment 22 .
  • the opening segments 20 , 22 may be of an arcuate shape. Further, the opening segments 20 , 22 may be curved concentrically. Also, the opening segments 20 , 22 may be curved concentrically around the center 24 of opening 16 . Further, the opening segments 20 , 22 may be designed in a semicircular shape.
  • the respective opening segments 20 , 22 each comprise longitudinal sides 28 and transverse sides 30 . Between the transverse sides 30 , respective webs 26 are arranged.
  • a polymeric material is extruded from the opening 16 , segmented in cross section, of the capillary 18 of spinneret 1 . From the opening segments 20 , 22 , there is extruded respectively one hollow-fiber wall portion 40 , 42 . Since the first opening segment 22 and the second opening segment 20 have different opening-segment widths 32 , 34 , also the hollow-fiber wall portions 40 , 42 extruded from the respective opening segments 20 , 22 will have different wall thicknesses.
  • the extruded hollow-fiber wall portions 40 , 42 will fuse to each other, wherein those regions will fuse to each other which are arranged in the area of the transverse sides 30 of the opening segments 20 , 22 .
  • the hollow-fiber wall portions 40 , 42 will thus fuse to each other also in the area of their lateral sides, so that there will be formed a hollow fiber 2 having a hollow-fiber wall which, in cross section, comprises two hollow-fiber wall portions 40 , 42 with different wall thicknesses.
  • the distance between the transverse sides 30 of the opening segments 20 , 22 is selected so that the hollow-fiber wall portions 40 , 42 after exiting from the opening can fuse to each other.
  • the extruded hollow-fiber wall portions 40 , 42 become connected to each other by fusion.
  • FIG. 4 a Shown in FIG. 4 a is a macroscopic picture of cross sections of hollow fibers 2 according to the invention.
  • FIG. 4 b shows an enlarged representation of a cross section of a hollow fiber 2 according to the invention.
  • the hollow fiber comprises a hollow-fiber wall 48 .
  • said hollow-fiber wall 48 comprises at least two hollow-fiber wall portions 40 , 42 .
  • a hollow-fiber wall 48 comprising two hollow-fiber wall portions 40 , 42 .
  • more than two hollow-fiber wall portions can be provided.
  • the first hollow-fiber wall portion 40 has a first wall thickness 44
  • the second hollow-fiber wall portion 42 has a second wall thickness 46 .
  • the second wall thickness 46 of the second hollow-fiber wall portion 42 is larger than the first wall thickness 42 of the first hollow-fiber wall portion.
  • Both the wall thickness 44 of the first hollow-fiber wall portion 40 and the second wall thickness 46 of the second hollow-fiber wall portion 42 are preferably constant and respectively unvarying.
  • the hollow-fiber wall 48 of the illustrated exemplary embodiment consisting of two hollow-fiber wall portions 40 , 42 , preferably has a D-shaped cross section.
  • the second hollow-fiber wall portion 42 which has the larger wall thickness 46 is curved more than the first hollow-fiber wall portion 40 having the smaller wall thickness 44 . Thereby, a D-shaped hollow-fiber cross section is generated. This is of particular advantage for the self-crimping properties of the hollow fiber.
  • the first hollow-fiber wall portion 40 and the second hollow-fiber wall portion 42 are connected to each other by fusion. This is the precondition for the crimping intensity of the hollow fiber.
  • the hollow fibers 2 produced by means of a spinning method will receive their crimping preferably after the drafting performed e.g. by the drafting devices 12 , 14 .
  • FIGS. 5 a to 5 d shown the hollow fibers after drafting.
  • the fibers were glued onto black panels and compared to each other under the aspect of quality. Of relevance are only the crimped portions.
  • the straight portions are undrafted fibers because the samples were drafted by hand.
  • FIG. 5 a a hollow fiber is shown that was produced by a spinneret, wherein the capillary of the spinneret comprised a segmented opening with opening segments spaced apart from each other in cross section.
  • the opening-segment widths of the respective opening segments were identical.
  • FIG. 5 b a hollow fiber is shown that was produced under the same test conditions as the hollow fiber according to FIG. 5 a , however, with the difference that a spinneret according to the invention was used whose capillaries comprised segmented openings having different opening-segment widths.
  • the second opening-segment width of the second opening segment was by 20% wider than the opening-segment width of the first opening segment.
  • FIG. 5 c a hollow fiber is shown that was produced under the same test conditions as the hollow fibers according to FIGS. 5 a and 5 b , however, with the difference that the segmented opening of the respective capillary comprises, in cross section, a first opening segment and a second opening segment wherein the opening-segment width of the second opening segment was by 40% wider than the opening-segment width of the first opening segment.
  • the crimping intensities of the hollow fibers produced by spinnerets of the invention whose opening segments had different widths are substantially stronger than the crimping intensity according to FIG. 5 a , as evident from the numerous small crimping arcs.
  • the hollow fiber according to FIG. 5 c had a slightly higher crimping intensity than the hollow fiber according to FIG. 5 b .
  • the hollow fibers according to FIGS. 5 b and 5 c both comprised a respective hollow-fiber wall having at least two hollow-fiber wall portions wherein the wall thickness of the first hollow-fiber wall portion and the wall thickness of the second hollow-fiber wall portion were different from each other.
  • the crimping intensity was especially good.
  • the crimping intensity was advantageous.
  • the wall thickness of the second hollow-fiber wall portion was by at least 5% and preferably by at least 20% larger than the wall thickness of the first hollow-fiber wall portion, the crimping intensity was again advantageous.
  • the hollow fibers had particularly good crimping intensities.
  • the present invention has the advantage that, even in case of mono-component hollow fibers, particularly good self-crimping properties were obtained.
  • a hollow fiber preferably has a D-shaped cross section.
  • Each of the hollow-fiber wall portions has a different spin orientation, which will lead to a different drafting and shrinking behavior. After drafting, this asymmetry will lead to a self-crimping of the fibers.
  • the above mentioned ratios of opening-segment widths and the different ratios of wall thicknesses were of particular advantage.
  • FIG. 5 d there is shown a C-shaped self-crimping hollow fiber under identical spinning conditions. While this C-shaped self-crimping hollow fiber of FIG. 5 d has large and relatively flat crimping arcs, the hollow fibers according to FIGS. 5 b and 5 c having the small and high arcs are crimped much more intensely. This will result in a higher wad, which—conversely—in applications as filling fibers will allow for a reduced filling weight for a given volume and thus will reduce the costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US15/028,022 2013-10-08 2014-10-02 Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers Abandoned US20160265141A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013016628.4 2013-10-08
DE102013016628.4A DE102013016628A1 (de) 2013-10-08 2013-10-08 Spinndüse zum Extrudieren von selbstkräuselnden Holfasern sowie selbstkräuselnde Hohlfasern und Verfahren zum Herstellen von selbstkräuselnden Hohlfasern
PCT/EP2014/071141 WO2015052070A1 (de) 2013-10-08 2014-10-02 Spinndüse zum extrudieren von selbstkräuselnden hohlfasern sowie selbstkräuselnde hohlfasern und verfahren zum herstellen von selbstkräuselnden hohlfasern

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US20160265141A1 true US20160265141A1 (en) 2016-09-15

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US15/028,022 Abandoned US20160265141A1 (en) 2013-10-08 2014-10-02 Spinneret for extruding self-crimping hollow fibers, self-crimping hollow fibers, and method for producing self-crimping hollow fibers

Country Status (6)

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US (1) US20160265141A1 (de)
EP (1) EP3055450A1 (de)
CN (1) CN105637128A (de)
DE (1) DE102013016628A1 (de)
RU (1) RU2016117271A (de)
WO (1) WO2015052070A1 (de)

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CN114540966A (zh) * 2022-03-01 2022-05-27 江苏恒科新材料有限公司 一种高中空度仿羊毛卷曲长丝的制备方法
CN115807271A (zh) * 2022-12-21 2023-03-17 江苏恒科新材料有限公司 喷丝板、非对称双中空卷曲涤纶及其制备方法

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
CH364582A (de) * 1958-01-18 1962-09-30 Inst Textiltechnologie Der Che Verfahren zum Kühlen von länglichen Formgebilden beim Spinnen aus der Schmelze sowie Anwendung des Verfahrens und Vorrichtung zur Durchführung des Verfahrens
JPS61108707A (ja) * 1984-10-26 1986-05-27 Toray Ind Inc 偏心中空繊維の溶融紡糸方法
KR100231196B1 (ko) * 1997-07-07 1999-11-15 김윤 압축회복력이 우수한 단성분 중공자발 권축섬유의 제조방법
US6454989B1 (en) * 1998-11-12 2002-09-24 Kimberly-Clark Worldwide, Inc. Process of making a crimped multicomponent fiber web
JP3696421B2 (ja) * 1998-11-12 2005-09-21 帝人ファイバー株式会社 複合繊維の製造方法
JP2001115339A (ja) * 1999-10-05 2001-04-24 Nippon Ester Co Ltd 太繊度ポリエステル中空複合繊維及びその製造方法
US6446691B1 (en) * 2000-12-21 2002-09-10 Kimberly-Clark Worldwide, Inc. Dual capillary spinneret for production of homofilament crimp fibers
JP2003227037A (ja) * 2002-02-01 2003-08-15 Teijin Ltd ストレッチ性織編物用ポリエステル複合中空繊維
CN1328422C (zh) * 2004-12-23 2007-07-25 天津工业大学 一种复合纺丝所用的喷头及其用途
WO2007042311A2 (de) * 2005-10-14 2007-04-19 Oerlikon Textile Gmbh & Co. Kg Verfahren und vorrichtung zur herstellung von stapelfasern aus schmelzgesponnenen hohlfasern
DK2216435T3 (en) * 2007-11-12 2019-03-18 Mitsui Chemicals Inc LONG FIBER NON-WOVEN FABRICS MANUFACTURED BY Eccentric HOLE COMPOSITION LONG FIBER AND APPLICATION THEREOF

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EP3055450A1 (de) 2016-08-17
WO2015052070A1 (de) 2015-04-16
DE102013016628A1 (de) 2015-04-09
RU2016117271A (ru) 2017-11-13
CN105637128A (zh) 2016-06-01

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GLAWION, ERWIN;FINDER, HORST;SIGNING DATES FROM 20160419 TO 20160421;REEL/FRAME:038672/0363

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