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EP0601278A1 - Centrifuge de filage - Google Patents

Centrifuge de filage Download PDF

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Publication number
EP0601278A1
EP0601278A1 EP93112923A EP93112923A EP0601278A1 EP 0601278 A1 EP0601278 A1 EP 0601278A1 EP 93112923 A EP93112923 A EP 93112923A EP 93112923 A EP93112923 A EP 93112923A EP 0601278 A1 EP0601278 A1 EP 0601278A1
Authority
EP
European Patent Office
Prior art keywords
threads
spinning rotor
particles
outlet openings
spinning
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.)
Granted
Application number
EP93112923A
Other languages
German (de)
English (en)
Other versions
EP0601278B1 (fr
Inventor
Dietrich Bernd
Christoph Dr. Josefiak
Ulrich Dr. Freudenberg
Peter Dr. Barth
Michael Dr. Hauber
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg 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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0601278A1 publication Critical patent/EP0601278A1/fr
Application granted granted Critical
Publication of EP0601278B1 publication Critical patent/EP0601278B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D01D5/18—Formation of filaments, threads, or the like by means of rotating spinnerets
    • 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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected

Definitions

  • the invention relates to a method for producing a textile fabric, in which a melt of a polymeric material is converted into the shape of threads with the aid of a spinning rotor, and in which the threads are subsequently combined and solidified to form a fabric.
  • Spunbonded processes enable the production of fine fiber nonwovens, which have different properties depending on the composition of the starting materials and the subsequent processing.
  • Centrifugal spinning processes have been known for many years. They have their origins in glass fiber production and have also been used for processing polymer materials for some time. Processes for producing nonwoven fabrics are described, for example, in the documents EP 0 071 085 A1, EP 0 168 817 A2, DE 31 05 784 A1, DE 3 215 810 C2, DE 3 801 080 A1, US 4,277,436.
  • a polymer granulate is usually melted in an extruder and conveyed under an excess pressure of up to 200 bar into a spinning rotor rotating at 3,000 to 11,000 rpm, which is electrically heated by heating elements.
  • the threads emerging radially from the spinning rotor are then deflected and consolidated on a conveyor belt to form a flat structure and deposited.
  • the processes for depositing the fine nonwoven threads as a nonwoven are often very complicated and expensive, as described, for example, in DE-PS 3 215 810 C2. If the threads are passed through a liquid cooling medium, subsequent drying of the material webs is even necessary.
  • a discharge occurs after a relatively short period of use of the filter element and thus a noticeably lower filter effect.
  • the invention has for its object to further develop a method such that filter elements made of nonwoven fabrics are still provided with filter-effective charges even after a long period of use.
  • This object is achieved in that the threads are acted upon after they emerge from the spinning rotor and while still sticky with an air flow and that solid particles are sprinkled into the air flow before they strike the threads.
  • the solid particles that are scattered into the air flow before they hit the threads enter into a connection with the still sticky surface, the threads emerging from the spinning rotor.
  • these particles consist of different materials. Barium titanate particles, for example, are dipoles that form agglomerates at room temperature and thus neutralize their charge. If the particles are heated to temperatures above 120 ° C by means of the air flow, they lose their charge. In this state, the particles reach the air flow in an even distribution facing, still plastic fiber surface and stick to the fiber.
  • This pretzel stick effect has the advantage that no separate adhesive is used which negatively influences the filtering effect of the fabric. As the size of the applied particles increases, the filter effect of the nonwoven fabric is further improved.
  • the threads are exposed to ionizing radiation immediately after their exposure to the particles. Due to the ionizing radiation, filter-effective charges form on the particle-loaded fibers, which remain effective even after long filter use.
  • the threads can be continuously and progressively deposited on a carrier fleece.
  • the suction box which can be arranged in a ring around the spinning rotor and also surrounds the carrier and cover material, ensures that the material webs are coated with the charge-carrying, particle-laden threads.
  • the fabric sheets are then laminated by pairs of rollers and can be rolled up on a winding station.
  • the invention relates to a device comprising a spinning rotor with outlet openings which can be rotated about its axis and first auxiliary means which can be moved parallel to the axis for continuously collecting the threads emerging from the outlet openings.
  • a device for producing spunbonded nonwovens should be simple in construction, work reliably and largely maintenance-free and at the same time be able to process the most varied of starting products to form as many end products as possible.
  • Centrifugal spinning devices have also been known for many years and are explained in the documents EP 0 071 085 A1, EP 0 168 817 A2, DE 3 105 784 A1, DE 3 215 810 C2, DE 3 801 080 A1, US 4,277,436.
  • the invention has for its object to further develop a device such that it can be used to produce a nonwoven fabric which is also provided with filter-effective charges even after a long period of use as a filter element.
  • a second aid for the continuous supply of a gas is assigned as well as a third aid for the continuous feeding of solid particles into the gas.
  • the second and third aids are assigned to the spinning rotor axially so close that the hot gas particle mixture is conveyed to the still sticky threads at the outlet openings by the boundary layer flow which is generated on the circumference of the spinning rotor by its rotation.
  • the spinning rotor can be preceded in the axial direction by an annular nozzle which has an exit direction facing the outer circumference of the spinning rotor.
  • the particle store according to claim 6 can also be arranged in front of the spinning rotor in the axial direction and has, for example, an outlet opening that opens into the ring nozzle.
  • This arrangement of particle storage and ring nozzle proves to be particularly advantageous. It enables compact dimensions of the device and unproblematic introduction of the particles into the hot gas stream. Acting on the gas in the boundary layer flow with particles that are added outside of the ring nozzle is structurally significantly more complex and problematic because of the required uniform distribution of the particles over the circumference of the spinning rotor.
  • the cross section of the outlet opening of the particle container is variable.
  • the amount of particles supplied to the hot gas can thus be varied at any time without great effort.
  • a wide range of particles can then be processed in terms of size and shape in the system.
  • the spinning rotor according to claim 8 is radially enclosed by corona elements for electrostatic charging of the threads, and the corona elements are the radial plane of the
  • Claims 9 and 10 relate to the corona elements which, according to claim 9, have an annular design and, based on the spinning rotor, can be fixed in place according to claim 10. Due to the annular shape and the fixed bearing, imbalances in the device are excluded even at high speeds of the spinning head. In addition, there are no rotating inertial forces in the case of stationary corona elements. Speed changes and corrections of the spinning rotor can be carried out faster and more precisely.
  • FIG. 1 shows the schematic arrangement of the device according to the invention.
  • the covering material 15 see FIG. 3
  • the upper part of the suction box 5 are not shown.
  • the rotation of the spinning head 1 exerts a centrifugal force on the polymer melt in the spinning head 1.
  • the melt accumulates on the inner circumference of the spinning head 1 in front of the nozzles 3 and is pressed through the nozzles 3 as a function of the speed 4 of the spinning head 1 (and thus as a function of the centrifugal force) and the viscosity of the melt.
  • the large number of still plastic threads 10 emerging from the nozzles 3 is greatly stretched by the braking effect of the air, the centrifugal force and the mass inertia.
  • Carrier 14 and cover material 15 move past the nozzles 3 in the axial direction of the spinning head 1.
  • the spinning head 1 is radially enclosed by the carrier 14 and cover material 15.
  • the threads are progressively brought to rest on the carrier 14 and the covering fleece 15 after they have solidified.
  • the two material webs coated with the fine fiber nonwoven 16 are laminated in the nip 6 and can be wound up by a winding station, not shown in the drawing.
  • FIG. 2 shows a spinning head 1 with an at least one-row nozzle ring 7 and the drive shaft 2.
  • a hot gas particle mixture 9 is applied to the rotating spinning rotor 1 through an annular nozzle 8, which is arranged in front of the spinning rotor 1 in the axial direction and has an outlet opening facing the outer circumference of the spinning rotor 1 blown.
  • the rotating spinning rotor 1 generates a boundary layer flow on its surface, as a result of which the hot gas particle mixture 9 arrives at the still plastic threads 10 emerging from the nozzles 3.
  • the particles of the hot gas particle mixture 9 stick to the surface of the threads 10.
  • FIG. 3 shows the structure of the filter material according to the invention.
  • a layer of fine-fiber nonwoven fabric 16 is embedded between a carrier 14 and cover material 15.
  • the particles 17 are shown on the fine-fiber nonwoven fabric 16.
  • the filter-effective charges, which remain effective even after prolonged use of the filter due to the dipole effect of the particles 17, are applied to the fine-fiber nonwoven 16, 17 which is loaded with particles.
  • FIG 4 a fiber made of polymeric material is shown schematically on a greatly enlarged scale.
  • the particles 17 located on the fiber surface bring about good usage properties over a long period of use.
  • FIG. 5 shows a greatly enlarged detail from the fiber of FIG. 4.
  • the particles 17, which are not arranged as agglomerates, but separately on the fiber surface, can be clearly seen.
  • the particles 17 are firmly adhered to the surface of the fibers without impairing the effective filter surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Filtering Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP93112923A 1992-12-10 1993-08-12 Centrifuge de filage Expired - Lifetime EP0601278B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4241514A DE4241514C2 (de) 1992-12-10 1992-12-10 Verfahren zur Herstellung eines mit Dipolen beladenen Flächengebildes und Vorrichtung zur Durchführung des Verfahrens
DE4241514 1992-12-10

Publications (2)

Publication Number Publication Date
EP0601278A1 true EP0601278A1 (fr) 1994-06-15
EP0601278B1 EP0601278B1 (fr) 1997-10-15

Family

ID=6474813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112923A Expired - Lifetime EP0601278B1 (fr) 1992-12-10 1993-08-12 Centrifuge de filage

Country Status (5)

Country Link
US (1) US5419794A (fr)
EP (1) EP0601278B1 (fr)
JP (1) JP2635924B2 (fr)
DE (1) DE4241514C2 (fr)
ES (1) ES2108793T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003013732A1 (fr) * 2001-07-30 2003-02-20 Helsa-Werke Helmut Sandler Gmbh & Co. Kg Element filtrant

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5637326A (en) * 1995-12-04 1997-06-10 Fuisz Technologies Ltd. Apparatus for making chopped amorphous fibers with an air transport system
US20070031607A1 (en) * 2000-12-19 2007-02-08 Alexander Dubson Method and apparatus for coating medical implants
EP1539326B1 (fr) * 2002-09-16 2012-04-25 TrioMed Innovations Corp. Milieu filtrant a charges electrostatiques incorporant un agent actif
KR101272425B1 (ko) * 2003-04-03 2013-06-07 이 아이 듀폰 디 네모아 앤드 캄파니 균일한 물질을 형성하기 위한 회전식 공정
CA2562274A1 (fr) * 2004-04-12 2005-10-27 Polymer Group, Inc. Procede de fabrication de substrats electroconducteurs
EP2271796A4 (fr) 2008-03-17 2012-01-04 Univ Texas Filière de création de fibres superfines et utilisations correspondantes
WO2012109240A2 (fr) * 2011-02-07 2012-08-16 Fiberio Technology Corporation Dispositifs de fabrication de fibre clivée et procédés de fabrication de microfibres et de nanofibres
US8778240B2 (en) 2011-02-07 2014-07-15 Fiberio Technology Corporation Split fiber producing devices and methods for the production of microfibers and nanofibers
DE102013007118A1 (de) * 2013-04-25 2014-10-30 Mann + Hummel Gmbh Mehrlagiges Filterelement
DE102014011443B4 (de) 2014-08-07 2021-12-16 Mann+Hummel Gmbh Filtermedium, Filterelement und Wechselfilter zur Filterung von partikulären Verunreinigungen aus einer Flüssigkeit
EP3679181A4 (fr) 2017-09-08 2021-05-12 The Board of Regents of The University of Texas System Tissus dopés par polymère mécanoluminescent et procédés
WO2020172207A1 (fr) 2019-02-20 2020-08-27 Board Of Regents, University Of Texas System Appareil portatif/portable pour la production de microfibres, de fibres submicroniques et de nanofibres
EP4301910A4 (fr) 2021-03-02 2024-08-14 Board of Regents, The University of Texas System Appareil de poche/portatif pour la production de fibres fines

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174182A (en) * 1962-06-22 1965-03-23 Edward W O Shaughnessy Spinning arrangement for spinning fibers from molten plastic or the like
JPS5218927A (en) * 1975-07-31 1977-02-12 Matsushita Electric Works Ltd Process for producing inorganic fibers coated with a protective coatin g
JPS5299324A (en) * 1976-02-14 1977-08-20 Matsushita Electric Works Ltd Apparatus for producing inorganic fibers
JPS63274641A (ja) * 1986-12-16 1988-11-11 Nippon Steel Chem Co Ltd 軽量な無機繊維の製造方法
EP0363033A2 (fr) * 1988-09-15 1990-04-11 Exxon Chemical Patents Inc. Appareil et procédé pour charger électriquement des étoffes fondues-souflées
DE4009351A1 (de) * 1989-03-28 1990-10-04 Nmi Naturwissenschaftl U Mediz Verfahren und vorrichtung zur herstellung von keramischen und/oder metallischen fasern

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Publication number Priority date Publication date Assignee Title
US3357807A (en) * 1961-12-08 1967-12-12 Owens Corning Fiberglass Corp Method and apparatus for forming and processing continuous filaments
FR1348800A (fr) * 1962-02-19 1964-01-10 Ici Ltd Filaments modifiés
JPS5043218A (fr) * 1973-08-28 1975-04-18
US4215682A (en) * 1978-02-06 1980-08-05 Minnesota Mining And Manufacturing Company Melt-blown fibrous electrets
US4277436A (en) * 1978-04-26 1981-07-07 Owens-Corning Fiberglas Corporation Method for forming filaments
NL187915C (nl) * 1981-02-16 1992-02-17 Sten Halvor Harsem Werkwijze voor het spinnen van vezels en inrichting voor het uitvoeren van deze werkwijze.
CA1155619A (fr) * 1981-02-19 1983-10-25 Leif E. Stern Methode de filature de fibres
US4440700A (en) * 1981-04-28 1984-04-03 Polymer Processing Research Institute Ltd. Process for collecting centrifugally ejected filaments
DE3128872A1 (de) * 1981-07-22 1983-02-10 Basf Ag, 6700 Ludwigshafen Verfahren zur reproduzierbaren herstellung von formteilchen unterschiedlicher geometrie aus polymerdispersionen, schmelzen oder loesungen
US4790736A (en) * 1984-07-20 1988-12-13 John E. Benoit Apparatus for centrifugal fiber spinning with pressure extrusion
JPS6176363A (ja) * 1984-08-09 1986-04-18 株式会社クラレ 加硫ゴム製品の製造法
US4797318A (en) * 1986-07-31 1989-01-10 Kimberly-Clark Corporation Active particle-containing nonwoven material, method of formation thereof, and uses thereof
DE3839956C2 (de) * 1987-11-28 1998-07-02 Toyo Boseki Elektret-Folie und Verfahren zu ihrer Herstellung
DE3801080A1 (de) * 1988-01-16 1989-07-27 Bayer Ag Verfahren zur herstellung von feinstpolymerfasern
US4865755A (en) * 1988-05-03 1989-09-12 Kimberly-Clark Corporation Method for incorporating powdered detergent ingredients into a meltblown laundry detergent sheet
US5173356A (en) * 1989-09-25 1992-12-22 Amoco Corporation Self-bonded fibrous nonwoven webs
CA2027687C (fr) * 1989-11-14 2002-12-31 Douglas C. Sundet Materiau de filtration et methode de fabrication connexe
US5123949A (en) * 1991-09-06 1992-06-23 Manville Corporation Method of introducing addivites to fibrous products

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174182A (en) * 1962-06-22 1965-03-23 Edward W O Shaughnessy Spinning arrangement for spinning fibers from molten plastic or the like
JPS5218927A (en) * 1975-07-31 1977-02-12 Matsushita Electric Works Ltd Process for producing inorganic fibers coated with a protective coatin g
JPS5299324A (en) * 1976-02-14 1977-08-20 Matsushita Electric Works Ltd Apparatus for producing inorganic fibers
JPS63274641A (ja) * 1986-12-16 1988-11-11 Nippon Steel Chem Co Ltd 軽量な無機繊維の製造方法
EP0363033A2 (fr) * 1988-09-15 1990-04-11 Exxon Chemical Patents Inc. Appareil et procédé pour charger électriquement des étoffes fondues-souflées
DE4009351A1 (de) * 1989-03-28 1990-10-04 Nmi Naturwissenschaftl U Mediz Verfahren und vorrichtung zur herstellung von keramischen und/oder metallischen fasern

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1, no. 157 (C - 032) 14 December 1977 (1977-12-14) *
PATENT ABSTRACTS OF JAPAN vol. 1, no. 59 (C - 015) 8 June 1977 (1977-06-08) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 95 (C - 573) 6 March 1989 (1989-03-06) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003013732A1 (fr) * 2001-07-30 2003-02-20 Helsa-Werke Helmut Sandler Gmbh & Co. Kg Element filtrant

Also Published As

Publication number Publication date
JP2635924B2 (ja) 1997-07-30
EP0601278B1 (fr) 1997-10-15
JPH06220761A (ja) 1994-08-09
DE4241514A1 (de) 1994-06-16
ES2108793T3 (es) 1998-01-01
US5419794A (en) 1995-05-30
DE4241514C2 (de) 1995-09-07

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