EP0002453A1 - Dispositif de traitement en surface de feuilles en bande par décharge électrique à effet corona - Google Patents

Dispositif de traitement en surface de feuilles en bande par décharge électrique à effet corona Download PDF

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Publication number
EP0002453A1
EP0002453A1 EP78101428A EP78101428A EP0002453A1 EP 0002453 A1 EP0002453 A1 EP 0002453A1 EP 78101428 A EP78101428 A EP 78101428A EP 78101428 A EP78101428 A EP 78101428A EP 0002453 A1 EP0002453 A1 EP 0002453A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
electrode
tube
roller
generator
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
EP78101428A
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German (de)
English (en)
Other versions
EP0002453B1 (fr
Inventor
Andreas Kolbe
Peter Dinter
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.)
Hoechst AG
Original Assignee
Hoechst AG
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Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0002453A1 publication Critical patent/EP0002453A1/fr
Application granted granted Critical
Publication of EP0002453B1 publication Critical patent/EP0002453B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T19/00—Devices providing for corona discharge
    • 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
    • Y10S422/00—Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
    • Y10S422/907—Corona or glow discharge means

Definitions

  • the present invention relates to an AC corona device for treating the surfaces of plastic or metal foils.
  • the method of operation of these methods is to guide the film to be treated over an electrically grounded support surface, e.g. a roller, a drum or an endless belt and the application of an electrical corona discharge to the side of the film facing away from the support surface, which is generated by supplying an electrode arranged at a distance from the support surface with a high-frequency alternating current of high voltage.
  • an electrically grounded support surface e.g. a roller, a drum or an endless belt
  • the known methods and devices working according to this basic principle differ more or less only in the embodiment of the support surface serving as counter electrode, such as a central roller with several electrodes, several support rollers with corresponding electrodes, etc., and the dielectric used to isolate the counter electrode Materials such as mica, glass, ceramics, plastic films, special rubber qualities, in the con Structural design of the electrode used, such as plate, wire, comb, knife, half-shell, spring or spindle electrode and the type of generator, such as low, medium or high frequency type.
  • the support surface serving as counter electrode such as a central roller with several electrodes, several support rollers with corresponding electrodes, etc.
  • the dielectric used to isolate the counter electrode Materials such as mica, glass, ceramics, plastic films, special rubber qualities, in the con Structural design of the electrode used, such as plate, wire, comb, knife, half-shell, spring or spindle electrode and the type of generator, such as low, medium or high frequency type.
  • roller or roll electrodes coated with a dielectric may certainly have given rise to the development of the alternative method, in which, as already mentioned, it is preferred to use roller or roll electrodes coated with a dielectric.
  • the use of small electrode rollers has several advantages. In addition to the simpler design and easier handling during installation and removal, there is also a reduction in repair costs. The latter has been achieved by replacing the vulcanizable, non-detachable insulating layers with replaceable dielectric coatings in the form of hose materials which can be drawn on or shrunk on. As for effectiveness, i.e.
  • the electrode described in DE-OS 25 56 228 represents a practically optimal device within the category of roller or roller electrodes.
  • the significantly improved power utilization compared to conventional electrodes however, even at high treatment speeds, several electrodes are still required, which is in consideration the once required higher technical and financial expenditure can be regarded as a certain disadvantage.
  • a device for the surface treatment of film webs by means of electrical corona discharge consisting of at least one roller electrode, at least one grounded counter electrode assigned to the latter, and a generator connected to the electrode for generating an AC voltage, preferably in high-frequency form
  • the roller electrode being made of a central axis, two cylindrical end pieces centrally attached to the axle, which are rotatably connected to the axle via bearings, a tube made of dielectric material supported by the end pieces, a feed line between the electrode and transformer / generator, and at least one bearing arm which holds the axle , Is, whose characteristic feature is that an inner tube is fitted in the tube, which carries the electrodes, which are connected via a slip ring and via the supply line to the transformer and generator and that the ge grounded counter electrodes in a conventional manner as tip electrodes in the form of combs, knives, teeth, but preferably thin wires, are formed.
  • the device according to the invention can also be seen in the use for the pretreatment of metal foils.
  • the device according to the invention is extremely valuable, especially for use in coating or printing machines. While in the conventional corona systems moisture introduced into the pretreatment station, e.g. in the event of tears, rollover immediately and thus lead to the dielectric burning out, the device according to the invention does not react in any way to such faults. Even puddles of liquid that were deliberately created on the film to be treated did not lead to breakdown or interruption of the discharge.
  • the corona device also contains additional positive features. Among other things This may undoubtedly also include the electrically safe design by relocating all live parts to the inside of the roller electrode.
  • the electrodes can be fitted to the inner tube in different ways.
  • Thin wires or wire mesh which preferably have a thickness of 0.2 to 0.3 mm, can be glued onto the inner tube.
  • the wires or wire mesh are preferably accommodated in correspondingly milled grooves in the inner tube.
  • the groove depth preferably corresponds almost to the thickness of the wires or wire mesh. This embodiment ensures that damage to the electrode when fitting the inner tube is absolutely avoided.
  • the electrodes are printed, i.e. they are in the form of printed circuits.
  • the axis of the roller electrode is designed as a hollow axis, which preferably has bores.
  • the hollow axis has connections for introducing and discharging, or if there are corresponding bores in the end pieces, to pass a cooling medium through the device during the corona treatment in order to remove any heat that arises.
  • the counter electrodes of the roller electrode can largely be assigned as desired, however, it has proven to be particularly expedient to attach them according to the radius of curvature of the roller electrode.
  • the counter electrodes are preferably connected with springs.
  • the outer and inner tubes of the device are preferably made of the same dielectric material, e.g. in particular from glass, paper soaked in phenol or melamine resin, glass fiber reinforced epoxy or silicone resins, polyesters or polycarbonates, all of which have a relatively scratch-resistant surface and are therefore not damaged, for example, by the necessary knife cuts in roll winders.
  • an elastic dielectric in the form of a tube can also be used instead of the mechanically dimensionally stable outer tube.
  • the corona system essentially consists first of all of a cylindrical roller body W, which acts as an electrode and at the same time serves to guide the substrate S to be treated, and consists of dielectric material, which is pushed through two tightly fitted tubes 5 and 6 is formed as well as a frame R arranged above the pivot point D and receiving the grounded counter electrodes 14.
  • a cylindrical roller body W which acts as an electrode and at the same time serves to guide the substrate S to be treated
  • dielectric material which is pushed through two tightly fitted tubes 5 and 6 is formed as well as a frame R arranged above the pivot point D and receiving the grounded counter electrodes 14.
  • the roller electrode consists of a fixed axle 1 mounted in the bearing arms 2.
  • Two cylindrical end pieces 4 rotatably mounted in ball bearings 3 about the axle 1 are mounted on the axle 1, which have a cylindrical pipe 5 made of a dielectric material wear.
  • cylindrical tube 6 is so closely fitted that both tubes have intimate contact with one another over the entire circumference.
  • the electrodes 7 are arranged in their cross-section corresponding grooves machined into the tube 6 on the entire circumference.
  • the electrodes 7, preferably thin metallic wires approximately 0.2 to 0.3 mm thick, are acted upon by a generator G with a high-frequency alternating current, which is high-voltage in the transformer T, above the segment-shaped slip ring 8 and the feed line 9.
  • the complete roller body is secured against axial displacement by clamping rings 10.
  • the slip ring 8 is pressed against the electrodes by a spring 19.
  • a gaseous medium in the simplest case air, is supplied through the axis 1 for the controllable temperature control of the entire unit by the fan V, which flows through the radial distribution bores 11 into the roller electrode and this in turn through the bores 12 machined in the end pieces 4.
  • the temperature control for the roller electrode can optionally be improved by combination with temperature-controlled steel or rubber rollers, as indicated in FIG. 1 in the form of the rollers 13, especially since there is no longer any electrical voltage in the contact area.
  • a liquid is also practical. internal temperature control using electrically non-conductive substances such as distilled water, transformer or silicone oils. In this case, the holes 12 of the end pieces must be closed.
  • the necessary counter electrode is arranged above the roller electrode described.
  • the wires 14 are fixed in their position in relation to the roller electrode by the segment disks 15 which are adapted to the radius of the roller body.
  • the compression springs 16 generate the required pretension and compensate for the thermal expansion and sagging.
  • the counter electrodes are suspended in a frame part; 17, which can be pivoted or pivoted about the pivot point D for the purpose of better insertion of the substrate to be treated.
  • the frame part 18, however, is firmly connected to the axis 1.
  • FIGS. 3, 4 and 5 show which design options are available when the electrodes 7 are designed on the inner tube 6, for example.
  • the former figure 4 and 5 represent modified manufacturing examples, the technically simplest version of the electrode arrangement on the carrier cylinder 6 in an axially parallel form.
EP78101428A 1977-12-02 1978-11-22 Dispositif de traitement en surface de feuilles en bande par décharge électrique à effet corona Expired EP0002453B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2753750A DE2753750C2 (de) 1977-12-02 1977-12-02 Vorrichtung zur Oberflächenbehandlung von Folienbahnen mittels elektrischer Coronaentladung
DE2753750 1977-12-02

Publications (2)

Publication Number Publication Date
EP0002453A1 true EP0002453A1 (fr) 1979-06-27
EP0002453B1 EP0002453B1 (fr) 1981-05-13

Family

ID=6025185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101428A Expired EP0002453B1 (fr) 1977-12-02 1978-11-22 Dispositif de traitement en surface de feuilles en bande par décharge électrique à effet corona

Country Status (4)

Country Link
US (1) US4239973A (fr)
EP (1) EP0002453B1 (fr)
DE (2) DE2753750C2 (fr)
DK (1) DK157959C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274043A1 (fr) * 1986-12-02 1988-07-13 Hoechst Aktiengesellschaft Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona

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US4484809B1 (en) * 1977-12-05 1995-04-18 Plasma Physics Corp Glow discharge method and apparatus and photoreceptor devices made therewith
FR2477950A1 (fr) * 1980-03-11 1981-09-18 Electricite De France Procede et dispositif de traitement de bandes de materiau polymere par decharge electrique
DE8022613U1 (de) * 1980-08-25 1980-11-27 Leeuwen, Peter Van, 8060 Dachau Aus einer Mehrzahl von in einer Reihe liegenden Einzelelektroden bestehende Hochspannungselektrode für eine Funkentladungseinrichtung
DE3039951A1 (de) * 1980-10-23 1982-05-27 Andreas Dipl.-Ing. 6420 Lauterbach Ahlbrandt Vorrichtung zum behandeln der oberflaeche von gegenstaenden durch elektrische spruehentladung
DE3203806A1 (de) * 1982-02-04 1983-08-11 Hoechst Ag, 6230 Frankfurt Verfahren und vorrichtung zur oberflaechenbehandlung von folienbahnen mittels elektrischer coronaentladung
US4533523A (en) * 1984-01-09 1985-08-06 Andreas Ahlbrandt Corona treater for plastic film
DE3416405A1 (de) * 1984-05-04 1985-11-07 Hoechst Ag, 6230 Frankfurt Verfahren und vorrichtung zur oberflaechenbehandlung von folienbahnen
US5192470A (en) * 1986-02-27 1993-03-09 Raytheon Company Method of stretching and polarizing polymer materials
DE3631584C2 (de) * 1986-09-17 1995-12-21 Hoechst Ag Vorrichtung zur Oberflächenbehandlung von Folienbahnen mittels elektrischer Koronaentladung
DE3735001A1 (de) * 1987-10-16 1989-04-27 Reifenhaeuser Masch Vorrichtung fuer die elektrostatische fixierung einer schmelzefahne aus thermoplastischem kunststoff auf einer kuehlwalze
US4940894A (en) * 1987-12-10 1990-07-10 Enercon Industries Corporation Electrode for a corona discharge apparatus
US5051586A (en) * 1990-04-18 1991-09-24 Sabreen Scott R Corona charging of plastic and apparatus therefor
US5169450A (en) * 1991-04-18 1992-12-08 American Roller Company Corona treatment roller electrode
CA2079647A1 (fr) * 1991-10-11 1993-04-12 Grover L. Farrar Pellicule de polyester enduite de silicone en ligne et procede d'induction
CH685004A5 (de) * 1992-04-21 1995-02-28 Sutter Apparatebau Ag Jurmin V Dielektrikumbildende Ummantelung für Elektroden von Coronavorbehandlungsanlagen.
US5401446A (en) * 1992-10-09 1995-03-28 The University Of Tennessee Research Corporation Method and apparatus for the electrostatic charging of a web or film
US5686050A (en) * 1992-10-09 1997-11-11 The University Of Tennessee Research Corporation Method and apparatus for the electrostatic charging of a web or film
US5592357A (en) * 1992-10-09 1997-01-07 The University Of Tennessee Research Corp. Electrostatic charging apparatus and method
US6238788B1 (en) 1993-04-19 2001-05-29 E. I. Du Pont De Nemours And Company Multi-layer film having self limiting heat seal and methods relating thereto
US5888599A (en) * 1993-04-19 1999-03-30 E. I. Du Pont De Nemours And Company Multi-layer lidding film having improved heat seal properties and methods relating thereto
US6852402B2 (en) 1994-08-12 2005-02-08 Emfitech Oy Dielectric cellular electret film and procedure for its manufacture
FI95039C (fi) * 1994-08-12 1995-12-11 Messet Ab Oy Itsekiinnittyvä kalvo ja menetelmä sen aikaansaamiseksi
US5558843A (en) * 1994-09-01 1996-09-24 Eastman Kodak Company Near atmospheric pressure treatment of polymers using helium discharges
DE19503718A1 (de) * 1995-02-04 1996-08-08 Leybold Ag UV-Strahler
US5955174A (en) * 1995-03-28 1999-09-21 The University Of Tennessee Research Corporation Composite of pleated and nonwoven webs
EP0801809A2 (fr) 1995-06-19 1997-10-22 The University Of Tennessee Research Corporation Procedes et electrodes de decharge pour la generation de plasmas sous pression d'une atmosphere et materiaux traites selon ces procedes
US5869188A (en) * 1997-02-26 1999-02-09 Eastman Kodak Company Electrostatographic member and system for electrostatographic reproduction and method for preparing same
US5965226A (en) * 1997-03-11 1999-10-12 Mitsubishi Polyester Film, Llc In-line method for laminating silicone-coated polyester film to paper, and laminate produced thereby
US6165422A (en) * 1999-03-01 2000-12-26 Modern Hard Chrome Service Company Apparatus for electric-discharge texturing of a roll
US6514324B1 (en) 2001-08-10 2003-02-04 Rick L. Chapman High efficiency active electrostatic air filter and method of manufacture
DE102005001158B4 (de) * 2005-01-10 2016-11-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Barrierenentladungselektroden mit Kühlung und Vorrichtung mit einer solchen Barrierenentladungselektrode
DE102005052441C5 (de) 2005-11-03 2013-05-16 Treofan Germany Gmbh & Co. Kg Verfahren zur Erhöhung der Oberflächenspannung einer biaxial orientierten Folie aus thermoplastischen Polymeren, sowie Verfahren zur Herstellung von bedruckten, metallisierten, laminierten, kaschierten oder beschichteten Folien, hergestellt nach diesem Verfahren zur Erhöhung der Oberflächenspannung
JP2008132723A (ja) * 2006-11-29 2008-06-12 Komori Corp 液体転移装置
DE102008016851B4 (de) * 2008-04-02 2010-04-15 Coatec Gesellschaft für Oberflächenveredelung mbH Verfahren zum Herstellen einer Koronawalze mit einem zylindrischen Grundkörper und einem Walzenbezug aus dielektrischem Werkstoff
WO2014085720A1 (fr) 2012-11-27 2014-06-05 Clearsign Combustion Corporation Bruleur à jets multiples doté d'interaction de charge
US20140170576A1 (en) * 2012-12-12 2014-06-19 Clearsign Combustion Corporation Contained flame flare stack
US20140170575A1 (en) * 2012-12-14 2014-06-19 Clearsign Combustion Corporation Ionizer for a combustion system, including foam electrode structure
US10571124B2 (en) 2013-02-14 2020-02-25 Clearsign Combustion Corporation Selectable dilution low NOx burner
WO2015057740A1 (fr) 2013-10-14 2015-04-23 Clearsign Combustion Corporation Commande de visualisation de flamme pour commande de combustion électrodynamique
DE102015010406A1 (de) * 2015-08-14 2017-02-16 Sig Technology Ag Elektrostatisch unterstütztes Bedrucken eines Packstofflaminats für formstabile Nahrungsmittelbehälter beinhaltend das gefaltete Packstofflaminat

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DE1195165B (de) * 1963-04-30 1965-06-16 Fotoclark F Gruen K G Aufladegeraet fuer mit einer photoleitenden Schicht versehene Folien
US3684364A (en) * 1971-06-24 1972-08-15 Xerox Corp Lift off electrode
DE2556228A1 (de) * 1975-12-13 1977-06-16 Hoechst Ag Coronaeinrichtung
DE2643772A1 (de) * 1976-09-29 1978-03-30 Hoechst Ag Coronaeinrichtung

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US3111471A (en) * 1960-07-05 1963-11-19 Dow Chemical Co Electrical treatment of polyethylene film
DE1779023C3 (de) * 1968-06-28 1973-09-20 Klaus 4801 Kuensebeck Kalwar Vorrichtung zum Behandeln von Folien bahnen aus thermoplastischem-Kunststoff mittels Koronaentladungen
DE6948579U (de) * 1969-12-15 1970-04-02 Klaus Kalwar Walzenelektrode zum elektrischen vorbehandeln von folien
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Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
DE1195165B (de) * 1963-04-30 1965-06-16 Fotoclark F Gruen K G Aufladegeraet fuer mit einer photoleitenden Schicht versehene Folien
US3684364A (en) * 1971-06-24 1972-08-15 Xerox Corp Lift off electrode
DE2556228A1 (de) * 1975-12-13 1977-06-16 Hoechst Ag Coronaeinrichtung
FR2335074A1 (fr) * 1975-12-13 1977-07-08 Hoechst Ag Dispositif a effet corona pour le traitement de materiaux, notamment thermoplastiques
DE2643772A1 (de) * 1976-09-29 1978-03-30 Hoechst Ag Coronaeinrichtung
FR2366720A1 (fr) * 1976-09-29 1978-04-28 Hoechst Ag Dispositif a effet corona, notamment pour le traitement de surface de feuilles thermoplastiques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274043A1 (fr) * 1986-12-02 1988-07-13 Hoechst Aktiengesellschaft Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona
US4839517A (en) * 1986-12-02 1989-06-13 Hoechst Aktiengesellschaft Roll electrode and device for pretreating the surfaces of film webs by means of electrical corona discharge

Also Published As

Publication number Publication date
DE2753750A1 (de) 1979-06-07
DK157959C (da) 1990-08-13
US4239973A (en) 1980-12-16
DK157959B (da) 1990-03-05
DE2753750C2 (de) 1982-12-23
DE2860704D1 (en) 1981-08-20
DK539878A (da) 1979-06-03
EP0002453B1 (fr) 1981-05-13

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