EP0223734B1 - Verfahren zur Herstellung eines Vlieses aus Endlosfäden und Vorrichtung zur Durchführung des Verfahrens - Google Patents

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

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Publication number
EP0223734B1
EP0223734B1 EP86730191A EP86730191A EP0223734B1 EP 0223734 B1 EP0223734 B1 EP 0223734B1 EP 86730191 A EP86730191 A EP 86730191A EP 86730191 A EP86730191 A EP 86730191A EP 0223734 B1 EP0223734 B1 EP 0223734B1
Authority
EP
European Patent Office
Prior art keywords
thread
nozzle
compressed air
tube
thread discharge
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
EP86730191A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0223734A2 (de
EP0223734A3 (en
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6286443&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0223734(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by JH Benecke GmbH, Corovin GmbH filed Critical JH Benecke GmbH
Priority to AT86730191T priority Critical patent/ATE67800T1/de
Publication of EP0223734A2 publication Critical patent/EP0223734A2/de
Publication of EP0223734A3 publication Critical patent/EP0223734A3/de
Application granted granted Critical
Publication of EP0223734B1 publication Critical patent/EP0223734B1/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
    • D04H3/02—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
    • D04H3/03—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 at random
    • 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
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/07—Coanda

Definitions

  • the invention relates to a method for producing a nonwoven from continuous filaments according to the preamble of claim 1.
  • the invention also relates to a device for carrying out the method.
  • Laval extension At the narrowest annular gap of the thread take-off nozzle is the so-called Laval extension, at the outlet of which a negative pressure is generated. This negative pressure is also established at the inlet of the thread take-off nozzle via an inner thread-guiding tube and enables thread threading.
  • the laval extension is followed by a thread extraction tube with the inner diameter of the laval extension, into which air flows in 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 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 only has the task of transporting the thread sheet to a spreading nozzle and, where appropriate, to so-called Coanda shells in order to distribute and spread the threads evenly before they meet a base to form the fleece.
  • the invention intervenes, which is based on the object of creating a method which, while maintaining the required thread pulling force, nevertheless enables a reduction in costs with regard to the required energy requirement.
  • the invention is intended to provide a device for carrying out such a method.
  • the method provided in the preamble of claim 1 provides that a gaseous propellant with lower pressure and volume is also supplied in the region of the outlet of the thread take-off device by means of an additional thrust nozzle, and that the inlet pressure and the inlet volume are simultaneously reduced.
  • the invention therefore takes the surprising route of additionally providing a thrust nozzle for feeding in with compressed air energy.
  • the invention is based on the knowledge that a reduction in the compressed air energy supplied to the thread draw-off nozzle can be carried out at the same time, while maintaining the original thread draw-off force.
  • the energy saving at the thread take-off nozzle is greater than the energy additionally required at the thrust nozzle, so that overall energy savings and cost savings are achieved. Experiments have shown that considerable energy savings of almost 30% can be achieved.
  • Another serious advantage of the invention is that this energy saving device is achieved in a simple manner by merely between the lower end of the thread guide tube and the expanding nozzle one component - namely a thruster - is used.
  • the dimensions and dimensions of the thread guide tube can be freely selected as long as the flow resistance of 1 kPa (0.01 bar) is not exceeded.
  • the invention enables a reduction in the compressed air pressure p 1 in front of the thread withdrawal nozzle from 2100 to 1600 kPa and a reduction in the amount of air V 1 from 72 to 52.4 m3 / h with the same thread pulling force.
  • p2 190 kPa
  • Another advantage of the invention is that the thrust nozzle enables the thread guide tube to be shortened, the flow resistance of which is thus reduced. If the total flow resistance of the take-off device is observed, the length / diameter ratios already mentioned above can be achieved by lengthening the thread take-off tube.
  • filaments 10 are drawn in in the direction of arrow A by a thread draw-off nozzle 12 known per se.
  • the continuous filaments 10 are obtained in a conventional manner from a melt and passed through spinnerets, not shown in the drawing.
  • 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.
  • the continuous threads 10 drawn off emerge at the bottom from an expansion nozzle 26 which is provided with Coanda shells 28.
  • Coanda effect is used to spread the threads 30 before they hit an air-permeable, sieve conveyor belt 32 which is under vacuum, whereby the 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.
  • the threads reach 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 18 located between the thread draw-off tube 16 and the thread guide tube 20 and having a cone angle of less than 8 °. The device described so far is known.
  • the thread guide tube 20 conveys the thread family to an existing thrust nozzle 22 in the new device, which is arranged between the thread guide tube 20 and the expanding nozzle 26 and has a compressed air connection 24, via which a quantity of air V2 is supplied at a low pressure p2.
  • the thread guide tube 20 is dimensioned so that the flow resistance is less than 1 kPa (0.01 bar).
  • Fig. 2 the detailed structure of the thrust nozzle 22 is shown, which is welded to the thread guide tube 20.
  • 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.
  • the first threaded part 34 and the second threaded part 38 form a pipe extension 40.
  • a rotatable one Adjustment ring 42 which can be moved in the axial direction by rotation, as well as a jacket 48 and a conical transition piece 50, which is welded to the inlet of the expansion nozzle 26.
  • a prechamber 52 connects to the compressed air connection 24 already shown in FIG. 1 and is connected to a storage space 56 via bores 54.
  • the inner wall of the adjustment ring 42 forms a feed in the form of a lava extension 46 with an air outlet 44 from the storage space 56 to the thread guide space 60.
  • the narrowest cross-section is designated by reference numeral 58, and L indicates the length of the Laval extension 46.
  • the length L of the Laval extension 46 can be influenced by turning the adjusting ring 42.
  • 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 or to the Laval extension 46.
  • the second threaded part 38 is flared at its end or outlet and the conical transition piece at its inlet.
  • the diameter of the thread take-off tube 16 is denoted by d 1 and the length by l 1, while d 2 and l 2 indicate the diameter or the length of the thread guide tube 20.
  • the length / diameter ratios can be varied by switching on the thrust nozzle 22.
  • the ratio l1 / d1 is about 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 results in less than 0.01 bar.
  • the ratio l2 / d2 is chosen so that the flow resistance mentioned above results in less than 0.01 bar.
  • other values are also possible for the conditions mentioned within the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP86730191A 1985-11-21 1986-11-21 Verfahren zur Herstellung eines Vlieses aus Endlosfäden und Vorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP0223734B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730191T ATE67800T1 (de) 1985-11-21 1986-11-21 Verfahren zur herstellung eines vlieses aus endlosfaeden und vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541128 1985-11-21
DE19853541128 DE3541128A1 (de) 1985-11-21 1985-11-21 Verfahren zur herstellung eines vlieses aus endlosfaeden und vorrichtung zur durchfuehrung des verfahrens

Publications (3)

Publication Number Publication Date
EP0223734A2 EP0223734A2 (de) 1987-05-27
EP0223734A3 EP0223734A3 (en) 1989-03-15
EP0223734B1 true EP0223734B1 (de) 1991-09-25

Family

ID=6286443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730191A Expired - Lifetime EP0223734B1 (de) 1985-11-21 1986-11-21 Verfahren zur Herstellung eines Vlieses aus Endlosfäden und Vorrichtung zur Durchführung des Verfahrens

Country Status (6)

Country Link
US (2) US4847035A (enrdf_load_stackoverflow)
EP (1) EP0223734B1 (enrdf_load_stackoverflow)
JP (1) JPS62206072A (enrdf_load_stackoverflow)
AT (1) ATE67800T1 (enrdf_load_stackoverflow)
DE (2) DE3541128A1 (enrdf_load_stackoverflow)
ES (1) ES2026463T3 (enrdf_load_stackoverflow)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5993943A (en) * 1987-12-21 1999-11-30 3M Innovative Properties Company Oriented melt-blown fibers, processes for making such fibers and webs made from such fibers
JP2887611B2 (ja) * 1990-01-27 1999-04-26 三井化学株式会社 不織布の製造方法及び装置
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
JP2842677B2 (ja) * 1990-08-27 1999-01-06 三井化学株式会社 不織布製造用エアガン
US5421064A (en) * 1991-04-09 1995-06-06 Mitsui Petrochemical Industries, Ltd. Filaments dispersing device
DE4414277C1 (de) * 1994-04-23 1995-08-31 Reifenhaeuser Masch Nach dem Ruhedruckprinzip arbeitende Spinnvliesanlage für die Herstellung einer Nonwoven-Spinnvliesbahn
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
US5667749A (en) * 1995-08-02 1997-09-16 Kimberly-Clark Worldwide, Inc. Method for the production of fibers and materials having enhanced characteristics
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
US7018188B2 (en) * 2003-04-08 2006-03-28 The Procter & Gamble Company Apparatus for forming fibers
EP2111487A2 (en) * 2007-01-19 2009-10-28 Oerlikon Textile GmbH & Co. KG Apparatus and method for depositing synthetic fibers to form a non-woven web
US20080217422A1 (en) * 2007-03-09 2008-09-11 Daniel Elden Near Nozzle assembly, delivery system and method for conveying insulation material
EP2464764A1 (en) * 2009-08-14 2012-06-20 The Procter & Gamble Company Spinning die assembly and method for forming fibres using said assembly
US20110076907A1 (en) * 2009-09-25 2011-03-31 Glew Charles A Apparatus and method for melt spun production of non-woven fluoropolymers or perfluoropolymers
CN102560705B (zh) * 2012-01-13 2014-12-03 常州惠明精密机械有限公司 纺粘无纺布纺丝下拉伸装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094262A (en) * 1960-11-25 1963-06-18 Du Pont Improved yarn handling sucker gun
US3485428A (en) * 1967-01-27 1969-12-23 Monsanto Co Method and apparatus for pneumatically depositing a web
DE1785158C3 (de) * 1968-08-17 1979-05-17 Metallgesellschaft Ag, 6000 Frankfurt Runddiise zum Abziehen und Ablegen von Fäden zu einem Fadenvlies
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
US3776796A (en) * 1971-09-28 1973-12-04 Allied Chem Process and apparatus for production of a nonwoven web
US3738894A (en) * 1971-09-28 1973-06-12 Allied Chem Foraminal apparatus for splaying and depositing nonwoven filamentary structures
US3734803A (en) * 1971-09-28 1973-05-22 Allied Chem Apparatus for splaying and depositing nonwoven filamentary structures
DE2200782A1 (de) * 1972-01-08 1973-08-02 Metallgesellschaft Ag Verfahren und vorrichtung zum herstellen eines vlieses aus endlosfaeden
JPS499436A (enrdf_load_stackoverflow) * 1972-05-26 1974-01-28
DE2421401C3 (de) * 1974-05-03 1982-12-09 J.H. Benecke Gmbh, 3000 Hannover Vorrichtung zum Verteilen eines Fadenbündels bei der Spinnvlies-Herstellung
US4346504A (en) * 1980-07-11 1982-08-31 Hoechst Fibers Industries Yarn forwarding and drawing apparatus
US4322027A (en) * 1980-10-02 1982-03-30 Crown Zellerbach Corporation Filament draw nozzle
JPS60151357A (ja) * 1984-01-12 1985-08-09 東レ株式会社 繊維ウェブの製造方法

Also Published As

Publication number Publication date
US4964197A (en) 1990-10-23
DE3681692D1 (de) 1991-10-31
DE3541128A1 (de) 1987-05-27
JPH0140142B2 (enrdf_load_stackoverflow) 1989-08-25
US4847035A (en) 1989-07-11
DE3541128C2 (enrdf_load_stackoverflow) 1989-08-17
EP0223734A2 (de) 1987-05-27
EP0223734A3 (en) 1989-03-15
JPS62206072A (ja) 1987-09-10
ATE67800T1 (de) 1991-10-15
ES2026463T3 (es) 1992-05-01

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