EP0274043B1 - Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona - Google Patents

Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona Download PDF

Info

Publication number
EP0274043B1
EP0274043B1 EP87117347A EP87117347A EP0274043B1 EP 0274043 B1 EP0274043 B1 EP 0274043B1 EP 87117347 A EP87117347 A EP 87117347A EP 87117347 A EP87117347 A EP 87117347A EP 0274043 B1 EP0274043 B1 EP 0274043B1
Authority
EP
European Patent Office
Prior art keywords
electrode
layer
roll
fibres
synthetic resin
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
EP87117347A
Other languages
German (de)
English (en)
Other versions
EP0274043A1 (fr
Inventor
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6315294&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0274043(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0274043A1 publication Critical patent/EP0274043A1/fr
Application granted granted Critical
Publication of EP0274043B1 publication Critical patent/EP0274043B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a roller electrode for surface treatment of film webs by means of an electrical corona discharge, which has an electrode arrangement and at least one dielectric insulating layer applied thereon, the dielectric insulating layer fiber being reinforced
  • the plastic film to be treated or the film to be treated is passed over an electrically grounded support surface, usually a roller, and the side of the film facing away from the support surface is exposed to an electrical corona discharge which is caused by the application of a high-frequency alternating current of high voltage to a spaced apart area to the support surface arranged electrode is generated.
  • the known devices working according to this basic principle differ more or less only in the design and the materials of the support surface serving as counterelectrode, such as e.g. a single central roller with peripherally arranged electrodes compared to several electrode rollers with associated electrodes, the dielectric materials used to isolate the counterelectrode, the structural design of the electrode used and the type of the respective generator.
  • the simplest and therefore preferred embodiment has been metallic carrier rollers made of solid material, in particular those made of steel or aluminum, with layers of insulation materials applied thereon. such as glass, ceramics, enamel, rubber, or glass fiber reinforced plastics.
  • insulation materials such as glass, ceramics, enamel, rubber, or glass fiber reinforced plastics.
  • the disadvantages of this design principle are on the one hand that the installation costs increase considerably due to the provision of expensive steel rollers and on the other hand due to weight problems, especially in large plants. technical difficulties in storage, deflection. the concentricity and the drive of the rollers occur.
  • EP-PS 0 002 453 and EP-PS 0 086 977 describe corona devices which use hollow roller bodies in the form of fiber-reinforced synthetic resin pipes.
  • these fiber-reinforced tubular bodies not only meet the mechanical requirements, but also through the embedded wire winding in the synthetic resin matrix of course also the electrode function.
  • the production of this glass fiber reinforced roller body is fully under control, but it turns out that when a wire winding or a wire helix is inserted into the plastic matrix to make it electrically conductive, the interlaminar shear strength, that is the adhesive property between the plastic matrix and the metal wire, is too leaves a lot to be desired.
  • GB-A 2.065.982 discloses a roller electrode for surface treatment of film webs by means of an electrical corona discharge, which consists of an electrically conductive carrier roller and at least one dielectric layer applied thereon.
  • the roller electrode has a shaft and a housing as a dielectric layer. The cavity between the shaft and the housing is completely filled with a pourable gypsum mass, carbon particles being dispersed in this gypsum mass, which bring about the conductivity of the gypsum mass. A wire mesh is inserted into the gypsum mass to reinforce it.
  • the insulating layer of this roller electrode consists of glass fiber, ceramic, hard rubber or the like material.
  • This roller electrode has a similar weight as a roller electrode, which is made of solid steel material. This high weight causes technical difficulties in the storage, deflection, concentricity and drive of the roller electrode. Compared to the roller electrode made of solid steel material, the only advantage is that it is cheaper to manufacture.
  • a roller electrode according to the preamble of claim 1 is known from EP-A 0 086 977. It consists of two dielectric tubes that are manufactured by a winding process.
  • the dielectric material of the tubes consists of glass fibers, glass fiber reinforced resins,
  • Polyester or polycarbonates all of which are not electrically conductive. Between the two tubes there are wire electrodes which are subjected to high-frequency AC voltage as electrodes of a corona device.
  • the object of the invention is to improve the roller electrode described above in such a way that the adhesive properties of the electrode material embedded in the plastic matrix and thus the interlaminar shear strength are increased and the mechanical strength of the composite body made of insulating layer and plastic matrix with embedded electrode material of the roller electrode is increased.
  • the electrode arrangement is an electrode layer made of synthetic resin, which forms a closed matrix, in which metallized fibers for increasing the bond strength and as electrode material are embedded, and in that the matrix of the layer and the insulating layer contain the same synthetic resin.
  • the fibers of the electrically conductive layer can be made of metallized electrically conductive glass, Aramid or carbon fibers. Glass fibers are expediently embedded in the insulating layer. Furthermore, the electrically conductive layer is embedded between two insulating layers.
  • the synthetic resins for the electrode layer and the insulating layers are preferably unsaturated polyester, epoxy, polyimide or silicone resins.
  • the invention relates to a device according to claim 9, with a roller electrode according to the invention, the first part of claim 9 being known from EP-A-0086977.
  • the metallization of different fibers with the aid of an electroless or chemogalvanic process is known, with these processes applying a metallic coating of nickel, cobalt, alloys of these metals to one another, including iron, for example nickel-iron, onto the fibers.
  • Gold, silver, copper and other chemically separable metals can also be chemically deposited on the surface of plastic fibers or their semi-finished products or textile fabrics after appropriate activation.
  • This metallization of electrical nonconductors, but also of conductive carbon fibers, can be carried out by various methods known in the art, this metallization not being the subject of the present invention.
  • the fiber surface is generally activated with heavy metal catalysts, and after the activation, the fiber material is placed in a metal salt solution and with the aid of a chemical reducing agent, the elemental metal is deposited on the fiber surface in the purest possible form (DE-OS 27 43 768).
  • the electrode materials can be processed using the machines and manufacturing processes introduced in the manufacture of composite materials. such as. the filament winding technology, easy to process.
  • the incorporation of high-strength fibers, which are impregnated, for example, with the same synthetic resin that is used to manufacture the plastic matrix of the base roll body results in a more homogeneous composite structure of the finished roll body, which has increased mechanical strength properties that are comparable to those of metals.
  • the metal layers deposited on the fibers have an adhesion-promoting effect on the fiber / resin component system, which leads to an increase in the interlaminar shear strength and ultimately to an improved bond strength of the molded body.
  • the known winding processes also allow the incorporation of a completely closed electrode layer in the synthetic resin matrix.
  • Such efforts e.g. Forming a full-surface conductive layer by intermediate winding of metal bandages, for example made of aluminum foil, has so far failed because the metal foil acted as a separating layer which interferes with the bond strength with respect to the inner and outer winding layers of the glass-fiber-reinforced roller body.
  • the impregnation of the metallized fiber rovings provided for the construction of the electrode layer with the matrix resin overcomes this disadvantage.
  • roller electrode according to the invention is explained in more detail with reference to the figures.
  • the device for corona pretreatment of film webs consists of a roller electrode 1 according to the invention, above which a metallic discharge electrode 2 is arranged, which is connected to a high-voltage generator 3.
  • a high-frequency alternating current of medium to high voltage to the discharge electrode 2
  • the air gap between the roller electrode 1 and the discharge electrode 2 is ionized, and a corona discharge is formed.
  • a film web 7 guided over the roller electrode 1 undergoes corresponding physical-chemical changes on its surface as it passes through the discharge zone, which increase its printability or bond strength with layer materials.
  • the roller electrode shown in Fig. 1 consists of an inner, electrically conductive. full-surface layer 4 as an electrode layer, an overlying insulating layer 5 made of glass fiber reinforced material and an outer protective layer 6 based on a silicone lacquer.
  • Metallized glass, aramid or carbon fibers which are embedded in a matrix of epoxy, silicone, unsaturated polyester or polyimide resins are suitable for forming the electrically conductive electrode layer 4.
  • metallic layer thicknesses of less than 1 mm. preferably by 0.5 mm, fully meets the requirements for the electrical conductivity of the metallized fibers.
  • the insulating layer 5 is an approximately 2.5 to 3.5 mm thick layer of glass fibers which, like the electrode layer 4, are embedded in a matrix of epoxy, silicone, unsaturated polyester or polyimide resins.
  • the protective layer 6 based on a silicone lacquer, which is only a few, prevents the abrasion and thus the destruction of the insulating layer 5 by the corona discharge.
  • the embodiment of the roller electrode 1 according to FIG. 2 differs from FIG. 1 in that the electrode layer 4 is embedded between two insulating layers 5, an inner carrier layer and an outer dielectric layer.
  • This embodiment allows various configurations of the electrode layer 4, such as they will be explained with reference to Figures 3, 4 and 5.
  • the inner insulating layer 5 exclusively fulfills the support function for the electrode layer 4.
  • An advantage of this roller construction is that the electrode layer 4, which is formed from expensive material, has to be wound, neglecting its mechanical strength properties, only as thinly as is required by the electrical requirement, while the inner backing layer is generally only designed according to strength criteria. Since the resin components of both the insulating layers 5, 5 and the electrode layer 4 are identical, there are no difficulties with regard to the interlaminar bond between the individual layers.
  • the electrically conductive layer 4 is designed as a tube which has an axially parallel fiber arrangement 10 in the synthetic resin matrix.
  • the electrically conductive layer 4 forms a homogeneous closed layer in the form of a tube, which is enclosed on each side by an insulating layer 5.
  • the fibers are embedded as a single- or multi-start helix 8 in the electrically conductive layer 4, which, as in FIG. 3, is designed as a homogeneous, closed tube.
  • FIG. 5 shows a further embodiment of the electrically conductive layer 4, in which the fibers form a network 9 in the synthetic resin matrix of the conductive layer 4, which is shaped as a homogeneous, closed tube.
  • the metallized fibers in the electrically conductive layer 4 can be incorporated into the synthetic resin matrix as scrims, woven fabrics, knitted fabrics, knitted fabrics, nonwovens or in any other form.
  • the embodiments shown in FIGS. 3 to 5 are exemplary of the large number of possible fiber arrangements in the synthetic resin matrix.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Laminated Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Reinforced Plastic Materials (AREA)

Claims (9)

  1. Electrode en rouleau pour le traitement de surface de bandes en forme de feuilles à l'aide d'une décharge électrique par effet couronne, qui comporte un dispositif formant électrode et au moins une couche isolante diélectrique disposée sur ce dispositif, la couche isolante diélectrique étant renforcée par des fibres, caractérisée en ce que le dispositif formant électrode est une couche formant électrode (4) en résine synthétique, qui forme une matrice fermée, dans laquelle sont noyées des fibres métallisées servant à accroître la solidité d'adhérence et utilisées comme matériau d'électrode, et que la matrice de la couche formant électrode (4) et la couche isolante (5) contiennent la même résine synthétique.
  2. Electrode en rouleau selon la revendication 1, caractérisée en ce que les fibres de la couche formant électrode (4) sont des fibres de Verre, d'aramide ou de carbone rendues électriquement conductrices par métallisation.
  3. Electrode en rouleau selon la revendication 1, caractérisée en ce que des fibres de verre sont insérées dans la couche isolante (5).
  4. Electrode en rouleau selon la revendication 1, caractérisée en ce que la couche formant électrode (4) est insérée entre deux couches isolantes (5, 5).
  5. Electrode en rouleau selon les revendications 1 à 4, caractérisée en ce que les résines synthétiques pour la couche formant électrode (4) et au moins une couche isolante (5) sont des résines de polyester insaturées, des résines époxy, des résines de polyimide ou des résines silicone.
  6. Electrode en rouleau selon les revendications 1 à 4, caractérisée en ce qu'une couche (6) à base de résines silicone est déposée sur la surface de l'électrode en rouleau (1), pour réaliser la protection vis-à-vis de l'abrasion suscitée par une décharge par effet couronne.
  7. Electrode en rouleau selon la revendication 1 ou 2, caractérisée en ce que les fibres de la couche formant électrode (4) sont incorporées, en tant que produits semi-finis ou bandes, sous la forme de mats, de tissus, de tricots, de treillis, de nappes, dans la matrice de résine synthétique.
  8. Electrode en rouleau selon les revendications 2 et 6, caractérisée en ce que la couche formant électrode (4) est réalisée sous la forme d'un tube et possède, en tant que couche homogène fermée, des fibres sous la forme d'une hélice (8) à un seul pas ou à pas multiples, d'un réseau (9) ou d'un ensemble (7) de fibres dont les axes sont parallèles, dans la matrice de résine synthétique.
  9. Dispositif pour le traitement de surface de bandes en forme de feuilles à l'aide d'une décharge électrique par effet couronne, constitué par une électrode chargée avec une tension alternative à haute fréquence par un générateur, et une contre-électrode, caractérisé en ce que la contre-électrode est constituée par une électrode en rouleau selon une ou plusieurs des revendications 1 à 7, la couche formant électrode (4) étant raccordée à la terre.
EP87117347A 1986-12-02 1987-11-25 Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona Expired - Lifetime EP0274043B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863641169 DE3641169A1 (de) 1986-12-02 1986-12-02 Walzenelektrode und vorrichtung zur oberflaechenvorbehandlung von folienbahnen mittels elektrischer koronaentladung
DE3641169 1986-12-02

Publications (2)

Publication Number Publication Date
EP0274043A1 EP0274043A1 (fr) 1988-07-13
EP0274043B1 true EP0274043B1 (fr) 1994-05-11

Family

ID=6315294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117347A Expired - Lifetime EP0274043B1 (fr) 1986-12-02 1987-11-25 Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona

Country Status (4)

Country Link
US (1) US4839517A (fr)
EP (1) EP0274043B1 (fr)
DE (2) DE3641169A1 (fr)
DK (1) DK631087A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2901838B2 (ja) * 1992-05-20 1999-06-07 プラクスエア・エス・ティー・テクノロジー・インコーポレイテッド コロナ装置
US6142409A (en) * 1997-12-01 2000-11-07 Eastman Kodak Company Corona discharge treatment roller and surface finishing process
DE202004016083U1 (de) * 2004-10-15 2006-02-23 Softal Electronic Erik Blumenfeld Gmbh & Co. Kg Vorrichtung zur Koronabehandlung von elektrisch isolierenden Materialien, insbesondere Kunststofffolien
US8545599B2 (en) 2010-10-28 2013-10-01 Tessera, Inc. Electrohydrodynamic device components employing solid solutions
US20120103568A1 (en) * 2010-10-28 2012-05-03 Tessera, Inc. Layered Emitter Coating Structure for Crack Resistance with PDAG Coatings

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024038A (en) * 1972-01-18 1977-05-17 Jane Luc Adhesive processes
DE2643772C2 (de) * 1976-09-29 1985-01-17 Hoechst Ag, 6230 Frankfurt Coronaeinrichtung
DE2743768C3 (de) * 1977-09-29 1980-11-13 Bayer Ag, 5090 Leverkusen Metallisiertes Textilmaterial
DE2753750C2 (de) * 1977-12-02 1982-12-23 Hoechst Ag, 6000 Frankfurt Vorrichtung zur Oberflächenbehandlung von Folienbahnen mittels elektrischer Coronaentladung
DE2754425A1 (de) * 1977-12-07 1979-06-13 Klaus Kalwar Verfahren und vorrichtung zum kontinuierlichen herstellen von zwei- oder mehrlagigen bahnfoermigen verbundwerkstoffen
US4281247A (en) * 1979-11-05 1981-07-28 Schuster Samuel J Roller electrode for use in apparatus for treating plastic film with high voltage corona discharge
DE3203806A1 (de) * 1982-02-04 1983-08-11 Hoechst Ag, 6230 Frankfurt Verfahren und vorrichtung zur oberflaechenbehandlung von folienbahnen mittels elektrischer coronaentladung
CA1190593A (fr) * 1983-02-01 1985-07-16 Paul E. Plasschaert Dispositif a effet de couronne

Also Published As

Publication number Publication date
DK631087A (da) 1988-06-03
US4839517A (en) 1989-06-13
DK631087D0 (da) 1987-12-01
DE3789804D1 (de) 1994-06-16
DE3641169A1 (de) 1988-06-09
EP0274043A1 (fr) 1988-07-13

Similar Documents

Publication Publication Date Title
DE3029288C2 (de) Mit einem elastomeren Material bedeckte Walze
DE3341468C2 (fr)
DE3750609T2 (de) Verfahren zur Herstellung eines kohlenstoffaserverstärkten thermoplastischen Harzgegenstandes.
AT504247A1 (de) Statorstäbe
EP0379012B1 (fr) Méthode pour la fabrication de stator d'une grosse machine électrique
WO2001019599A1 (fr) Preimpregne renforce par des fibres de carbone pour composants renforces multi-axiaux
DE3333015C2 (de) Ferrit-Verbundstruktur sowie Verfahren zu deren Herstellung
WO2019158429A1 (fr) Chemise d'entrefer pour une machine électrique fabriquée à partir d'un matériau composite à fibres, machine électrique ainsi que procédé de fabrication
EP2390885B1 (fr) Procédé de fabrication d'enroulements pour un transformateur sec
DE10060653A1 (de) Elektrischer Doppelschicht-Kondensator
EP0274043B1 (fr) Electrode tambour et appareil pour traitement de surface de feuilles par décharge électrique corona
DE19949318A1 (de) Kohlenstoffaserverstärktes SMC für multiaxial verstärkte Bauteile
WO2009124862A1 (fr) Matériau composite composé d'une matrice métallique dans laquelle sont répartis des filaments de nanotube de carbone et procédé de fabrication d'un tel matériau composite
EP2113036A2 (fr) Matériau composite renforcé par des fibres et à matrice métallique et procédé de fabrication dudit matériau
DE2345366A1 (de) Faserbeschichtetes thermoplast
DE3127505C2 (de) Verfahren zum Herstellen eines Schichtstoffes
EP1813419A1 (fr) Materiau isolant
DE3012288C2 (de) Faden mit einem präparierten Kernfaden
EP0095051A1 (fr) Dispositif pour le traitement préalable électrique de feuilles non-conductrices
WO2015121002A1 (fr) Procédé de fabrication d'un demi-produit en matériau synthétique thermoplastique servant au blindage contre le rayonnement électromagnétique et demi-produit en matériau synthétique thermoplastique servant au blindage contre le rayonnement électromagnétique
EP3607564B1 (fr) Bande d'isolation électrique, machine électrique haute tension et procédé de fabrication d'une bande d'isolation électrique et machine électrique haute tension
DE102014104266A1 (de) Multiaxiales textiles Gelege zur Herstellung eines elektrisch leitfähigen Faserverbundbauteils
DE3631584C2 (de) Vorrichtung zur Oberflächenbehandlung von Folienbahnen mittels elektrischer Koronaentladung
DE3421123A1 (de) Verbundmaterial
EP2952338B1 (fr) Procédé destiné à la fabrication d'un composant en matière composite renforcée par des fibres, préforme et dispositif de fabrication

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19881122

17Q First examination report despatched

Effective date: 19900103

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940511

REF Corresponds to:

Ref document number: 3789804

Country of ref document: DE

Date of ref document: 19940616

ET Fr: translation filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19940511

EAL Se: european patent in force in sweden

Ref document number: 87117347.2

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19951026

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19961126

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970619

Year of fee payment: 10

EUG Se: european patent has lapsed

Ref document number: 87117347.2

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980801

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990528

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000731

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: RN

REG Reference to a national code

Ref country code: FR

Ref legal event code: IC

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO