EP0224435B1 - Verfahren zur Herstellung eines Vlieses aus Endlosfäden sowie Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zur Herstellung eines Vlieses aus Endlosfäden sowie Vorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0224435B1
EP0224435B1 EP86730192A EP86730192A EP0224435B1 EP 0224435 B1 EP0224435 B1 EP 0224435B1 EP 86730192 A EP86730192 A EP 86730192A EP 86730192 A EP86730192 A EP 86730192A EP 0224435 B1 EP0224435 B1 EP 0224435B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
thread
spreading
compressed air
tube
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.)
Expired - Lifetime
Application number
EP86730192A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0224435A3 (en
EP0224435A2 (de
Inventor
Kurt Mente
Gerhard Knitsch
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.)
JH Benecke GmbH
Corovin GmbH
Original Assignee
JH Benecke GmbH
Corovin GmbH
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 JH Benecke GmbH, Corovin GmbH filed Critical JH Benecke GmbH
Priority to AT86730192T priority Critical patent/ATE72681T1/de
Publication of EP0224435A2 publication Critical patent/EP0224435A2/de
Publication of EP0224435A3 publication Critical patent/EP0224435A3/de
Application granted granted Critical
Publication of EP0224435B1 publication Critical patent/EP0224435B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • the invention relates to a method for producing a nonwoven from continuous threads according to the features of the preamble of claim 1, and the invention also relates to an apparatus for performing the method.
  • the method and device of the presupposed genus are already known from DE-PS 1 785 158, GB-PS 1 282 176 and GB-PS 1 297 582. From a melt and from spinnerets, a family of threads is passed through a thread take-off device which has a thread take-off nozzle supplied with highly compressed compressed air at its upper end.
  • Laval extension At the narrowest annular gap of the thread take-off nozzle there is a so-called Laval extension, at the outlet of which a negative pressure is generated, which is also established at the inlet of the thread take-off nozzle via an inner thread-guiding tube and thus enables threading of the thread sheet.
  • the laval extension mentioned is followed by a thread draw-off tube with the inner diameter of the laval extension, into which air flows at supersonic speed.
  • a compression shock occurs with a subsequent subsonic flow, which further slows down in a subsequent thread guide tube with four to six times the cross-section.
  • the thread take-off device comprising the thread take-off tube and the thread guide tube
  • the threads are drawn, which thereby become thinner.
  • the main part of the thread pulling force for stretching the threads is applied by the thread pulling tube.
  • the thread guide tube essentially has the task of transporting the thread sheet to a spreading nozzle provided with Coanda shells in order to distribute and spread the threads before they hit or hit a base to form the fleece.
  • the spreading of the thread sheet through the spreading nozzle is of crucial importance for the quality and the structure of the fleece. The more evenly the spreading or distribution takes place, the better the fleece quality.
  • the known spreading nozzle with Coanda shells allows in principle a spreading of the thread sheet by flow technology, but it can be observed in practice again and again that the uniformity of the structure of the fleece still leaves something to be desired in the case of high demands, and that with regard to the quality of the fleece There are limits. This is due to an insufficient spreading or distribution of the thread group.
  • the invention has for its object to provide a method which a more uniform distribution or. Spreading of the thread sheet through the expanding nozzle allows to increase the quality of the fleece.
  • the invention is also intended to provide a device for carrying out the method.
  • the Spreading nozzle additionally externally a gaseous propellant with low pressure and volume compared to the inlet pressure and volume is supplied by means of a slot nozzle.
  • the invention is based on the surprising finding that the spreading effect desired for increasing the quality can be set and substantially improved by externally supplying an air quantity in the area of the expanding nozzle, as a result of which the structure of the nonwoven becomes more uniform.
  • the slot nozzles have laval extensions working in the negative pressure region, as a result of which the thread family is also broken up transversely to the longitudinal slot of the expanding nozzle by means of outward-directed shock waves in the interests of better and more uniform distribution.
  • a negative pressure is established at the outlet openings of the laval extensions of the slot nozzles located on both sides of the expansion nozzle.
  • the ambient air pressure prevails, so that as a result, the outwardly directed shock waves arise, which also dissolve and distribute the thread group transverse to the longitudinal slot of the expanding nozzle.
  • Thread draw-off nozzle is reduced, and the length / diameter ratio of the thread draw-off tube forming the thread draw-off device and the thread guide tube are chosen so that the thread draw-off force which is present at the expanding nozzle without the additional propellant supply is retained.
  • Another important advantage of the invention is that, with the thread pulling force remaining constant and with the decisively improved spreading of the thread family by the spreading nozzle, considerable energy savings can be achieved at the same time.
  • the spreading and even distribution of the thread sheet through the expanding nozzle can be further improved if, in an expedient embodiment of the invention, a further additional amount of compressed air is supplied via a thrust nozzle between the lower end of the thread take-off tube and the expanding nozzle.
  • a further additional amount of compressed air is supplied via a thrust nozzle between the lower end of the thread take-off tube and the expanding nozzle.
  • the thread pulling force, the flow resistance and the thread pulling device and the requirement that a vacuum of 0.6 to 0.8 bar should prevail at the suction mouth of the thread pulling nozzle in order to be able to thread the thread sheet into the thread pulling nozzle, and based on the fact that the thread pull-off force must not be reduced in order to achieve a specific thread titer, a length / diameter ratio of the thread pull-off tube, depending on the polymer and titer, of l / d 80 to 180 has proven successful.
  • the dimensions and dimensions of the thread guide tube can be freely selected as long as the flow resistance of 0.01 bar is not exceeded.
  • filaments 10 are in the direction of arrow A by themselves known thread draw-off nozzle 12.
  • the continuous threads 10 are obtained in a conventional manner from a melt and passed through spinnerets, not shown, from where they reach the thread take-off nozzle 12.
  • the thread take-off nozzle 12 has a compressed air connection 14 for supplying a quantity of compressed air V 1 under the pressure p 1.
  • a thread take-off tube 16 connects to the thread take-off nozzle 12, and a thread guide tube 20 is connected via a transition cone 18, which has a cone angle of less than 8 °.
  • the continuous threads 10 drawn off emerge at the bottom from an expansion nozzle 26 which adjoins the thread guide tube 20 and which is provided with Coanda shells 28.
  • the so-called Coanda effect is used to spread the threads 30 before they hit an air-permeable screen conveyor belt 32, which is under vacuum, whereby the fleece - for example a polypropylene fleece - is formed.
  • the thread take-off force is generated predominantly in the thread take-off tube 16 which is flowed through at the supersonic speed in the first half and at the subsonic speed after the compression stroke. Reach the threads speeds of 30 to 100 m / s depending on the size of the thread titer.
  • the flow resistance is kept low by the transition cone 12 located between the thread take-off tube 16 and the thread guide tube 20. The device described so far is known per se.
  • Additional slot nozzles 69 are arranged on both sides of the expansion nozzle 26, the detailed structure of which is explained below with reference to FIGS. 4-6.
  • the area of the expanding nozzle 26 there is therefore an additional supply of a compressed air quantity with the volume V3 under a pressure p3 via a compressed air connection 66.
  • the input volume V1 and possibly the input pressure p1 at the thread take-off nozzle 12 are reduced.
  • the thread guide tube 20 is dimensioned so that the flow resistance is less than 0.01 bar, and the length / diameter ratio l 1 / d 1 of the thread pulling tube 16 is dimensioned such that the thread pull-off force is retained which, without the additional feed of compressed air via the compressed air connection 66 is available.
  • the spreading effect can be influenced and adjusted to an optimal spread.
  • the threads 30 are therefore distributed more evenly, which improves the quality of the fleece.
  • the spreading angle on the Coanda shells 28 increases with the amount of air and thus the distribution of the thread group becomes more uniform.
  • a further nozzle is provided as a thrust nozzle 22 between the expanding nozzle 26 and the thread guide tube 20, and a further additional air quantity V2 with the pressure p2 is supplied at this point via a compressed air connection 24.
  • the closer structure of the thrust nozzle 22 welded to the thread guide tube 20 can be seen in FIG. 3.
  • the thrust nozzle 22 comprises a first threaded part 34 which is screwed to a second threaded part 38 and is secured against rotation by a cylindrical pin 36.
  • first threaded part 34 and the second threaded part 38 form a pipe extension 40.
  • the thrust nozzle 22 comprises a rotatable adjusting ring 42 which can be moved by rotation in the axial direction, as well as a jacket 48 and a conical transition piece 50 which is welded to a connecting tube 61 leading to the expansion nozzle 26.
  • a prechamber 52 connects to the compressed air connection 24 within the thrust nozzle 22 and is connected via bores 54 to a storage space 56.
  • the inner wall of the adjustment ring 42 forms a feed from the storage space 56 to the thread guide space 60 with a narrowest cross-section 58 and a lava extension 46 with an air outlet 44.
  • the length L of the lava extension 46 can be changed by rotating the adjustment ring 42 to the air pressure at the air outlet 44 adjust.
  • the jacket 48 and the first threaded part 34 are fixed axially and radially.
  • the compressed air V2; p2 flows through the compressed air connection 24 into the pre-chamber 52 and through the holes 54 in the storage space 56 and then through the narrowest cross section 58 to the air outlet 44.
  • the second threaded part 38 is flared at the end or outlet and the conical transition piece 50 at the inlet.
  • the expanding nozzle 26 shown in FIGS. 4-6 Connected to the connecting pipe 25 is the expanding nozzle 26 shown in FIGS. 4-6, which is held by a pipe jacket 62 and a union nut 63.
  • the expansion nozzle 26 consists of an upper part 64 and a lower part 65.
  • the inner bore in these parts changes in a manner known per se from a circular to a slit-shaped cross section at the outlet 68.
  • the Coanda shells 28 which are held by a suspension 29.
  • each compressed air connection 66 opens into a storage space 70 of the slot nozzle, which is fastened to the expansion nozzle 26 by means of screws 67.
  • the attachment of the slot nozzle body 69 by means of the screws 67 can be seen particularly clearly (for better clarity of the drawing, a compressed air connection 66 is shown in FIG. 6 only on the right side).
  • Each slot nozzle thus comprises, as an essential component, a storage space 70 arranged laterally to the expanding nozzle, which narrows down to a narrowest cross section 71, to which the outlet openings 72 with laval widening are connected.
  • a storage space 70 arranged laterally to the expanding nozzle, which narrows down to a narrowest cross section 71, to which the outlet openings 72 with laval widening are connected.
  • nozzle body 69 extends slightly beyond the outlet 68 below. It is hereby achieved that the shock waves generated as a result of the pressure jump between the air pressure at the outlet 68 of the expansion nozzle and the air pressure at the outlet openings 72 of the slot nozzles initially act from the inside out. The shock waves which only then begin to act from the outside inwards cause, together with the former, strong turbulence which, as mentioned above, also tears open and distributes the sheet of fibers transversely to the longitudinal slot or to the outlet 68.
  • the length / diameter ratios l 1 / d 1 and l 2 / d 2 can be varied.
  • the ratio l1 / d1 is approximately 110 to achieve an optimal thread pulling force.
  • the thread guide tube 20 largely determines the flow resistance, and here the ratio l2 / d2 is chosen so that the flow resistance mentioned above is less than 0.01 bar. Within the scope of the invention, other values are of course also possible for the conditions mentioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP86730192A 1985-11-21 1986-11-21 Verfahren zur Herstellung eines Vlieses aus Endlosfäden sowie Vorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP0224435B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730192T ATE72681T1 (de) 1985-11-21 1986-11-21 Verfahren zur herstellung eines vlieses aus endlosfaeden sowie vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853541127 DE3541127A1 (de) 1985-11-21 1985-11-21 Verfahren zur herstellung eines vlieses aus endlosfaeden sowie vorrichtung zur durchfuehrung des verfahrens
DE3541127 1985-11-21

Publications (3)

Publication Number Publication Date
EP0224435A2 EP0224435A2 (de) 1987-06-03
EP0224435A3 EP0224435A3 (en) 1989-03-15
EP0224435B1 true EP0224435B1 (de) 1992-02-19

Family

ID=6286442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730192A Expired - Lifetime EP0224435B1 (de) 1985-11-21 1986-11-21 Verfahren zur Herstellung eines Vlieses aus Endlosfäden sowie Vorrichtung zur Durchführung des Verfahrens

Country Status (6)

Country Link
US (1) US4818466A (enrdf_load_stackoverflow)
EP (1) EP0224435B1 (enrdf_load_stackoverflow)
JP (1) JPS62206073A (enrdf_load_stackoverflow)
AT (1) ATE72681T1 (enrdf_load_stackoverflow)
DE (2) DE3541127A1 (enrdf_load_stackoverflow)
ES (1) ES2031074T3 (enrdf_load_stackoverflow)

Families Citing this family (20)

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Publication number Priority date Publication date Assignee Title
JPH01246406A (ja) * 1988-03-28 1989-10-02 Mitsui Petrochem Ind Ltd メルトブロー法による紡糸方法並びにメルトブロー用ダイ
US5225018A (en) * 1989-11-08 1993-07-06 Fiberweb North America, Inc. Method and apparatus for providing uniformly distributed filaments from a spun filament bundle and spunbonded fabric obtained therefrom
CA2038164C (en) * 1990-03-14 1999-02-09 Keiji Kobayashi Air gun for the production of non-woven fabric and non-woven fabric producing apparatus
US5421064A (en) * 1991-04-09 1995-06-06 Mitsui Petrochemical Industries, Ltd. Filaments dispersing device
DE4312419C2 (de) * 1993-04-16 1996-02-22 Reifenhaeuser Masch Anlage für die Herstellung einer Spinnvliesbahn aus aerodynamischen verstreckten Filamenten aus Kunststoff
DE4332345C2 (de) * 1993-09-23 1995-09-14 Reifenhaeuser Masch Verfahren und Vliesblasanlage zur Herstellung von einem Spinnvlies mit hoher Filamentgeschwindigkeit
AT403483B (de) * 1993-09-30 1998-02-25 Polyfelt Gmbh Verfahren zur herstellung von spinnvliesen
US5667749A (en) * 1995-08-02 1997-09-16 Kimberly-Clark Worldwide, Inc. Method for the production of fibers and materials having enhanced characteristics
US5711970A (en) * 1995-08-02 1998-01-27 Kimberly-Clark Worldwide, Inc. Apparatus for the production of fibers and materials having enhanced characteristics
US5811178A (en) * 1995-08-02 1998-09-22 Kimberly-Clark Worldwide, Inc. High bulk nonwoven sorbent with fiber density gradient
AU1022397A (en) * 1995-12-15 1997-07-14 Kimberly-Clark Corporation High temperature, high speed rotary valve
US6013223A (en) * 1998-05-28 2000-01-11 Biax-Fiberfilm Corporation Process and apparatus for producing non-woven webs of strong filaments
JP3701837B2 (ja) 2000-03-30 2005-10-05 ユニ・チャーム株式会社 不織布の製造方法および装置
JP3658284B2 (ja) 2000-07-05 2005-06-08 ユニ・チャーム株式会社 不織布製造装置
US20030003834A1 (en) * 2000-11-20 2003-01-02 3M Innovative Properties Company Method for forming spread nonwoven webs
US7018188B2 (en) * 2003-04-08 2006-03-28 The Procter & Gamble Company Apparatus for forming fibers
DE10360845A1 (de) * 2003-12-20 2005-07-21 Corovin Gmbh Weiches Vlies auf Basis von Polyethylen
BR112012002957A2 (pt) 2009-08-14 2016-04-12 Procter & Gamble conjunto de matriz de fiação e método para formação de fibras com o uso do dito conjunto.
US20110076907A1 (en) * 2009-09-25 2011-03-31 Glew Charles A Apparatus and method for melt spun production of non-woven fluoropolymers or perfluoropolymers
CN105887334B (zh) * 2016-06-15 2019-01-25 天鼎丰非织造布有限公司 一种纺粘无纺布专用分丝器、纺丝器

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US3563838A (en) * 1968-07-09 1971-02-16 Du Pont Continuous filament nonwoven web
DE1785158C3 (de) * 1968-08-17 1979-05-17 Metallgesellschaft Ag, 6000 Frankfurt Runddiise zum Abziehen und Ablegen von Fäden zu einem Fadenvlies
DE1936354C3 (de) * 1969-07-17 1979-04-05 Metallgesellschaft Ag, 6000 Frankfurt Spreizdüse zum Ablegen von Endlosfäden zur Bildung eines Vlieses
DE1950669C3 (de) * 1969-10-08 1982-05-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Vliesherstellung
DE2053918B2 (de) * 1970-11-03 1976-09-30 Basf Farben + Fasern Ag, 2000 Hamburg Verfahren und vorrichtung zur herstellung gekraeuselter faeden aus synthetischen hochpolymeren
US3736211A (en) * 1971-09-28 1973-05-29 Allied Chem Two-planar deflector for dispersing and depositing nonwoven filamentary structures
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DE2200782A1 (de) * 1972-01-08 1973-08-02 Metallgesellschaft Ag Verfahren und vorrichtung zum herstellen eines vlieses aus endlosfaeden
DE2406321C3 (de) * 1974-02-09 1981-04-09 Fa. Carl Freudenberg, 6940 Weinheim Spinnvlies, bestehend aus wirr verteilten, endlosen Polyamid-6-Fäden
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Also Published As

Publication number Publication date
US4818466A (en) 1989-04-04
EP0224435A3 (en) 1989-03-15
ES2031074T3 (es) 1992-12-01
DE3541127C2 (enrdf_load_stackoverflow) 1989-08-10
ATE72681T1 (de) 1992-03-15
EP0224435A2 (de) 1987-06-03
JPS62206073A (ja) 1987-09-10
DE3683927D1 (de) 1992-03-26
JPH02463B2 (enrdf_load_stackoverflow) 1990-01-08
DE3541127A1 (de) 1987-05-27

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