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US3708733A - Method of improving the surface activity of electrically conductive carrier strips - Google Patents

Method of improving the surface activity of electrically conductive carrier strips Download PDF

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Publication number
US3708733A
US3708733A US00118832A US3708733DA US3708733A US 3708733 A US3708733 A US 3708733A US 00118832 A US00118832 A US 00118832A US 3708733D A US3708733D A US 3708733DA US 3708733 A US3708733 A US 3708733A
Authority
US
United States
Prior art keywords
strip
electrode
roller
electrically conductive
conductive carrier
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
US00118832A
Other languages
English (en)
Inventor
H Bille
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.)
Softal Elektronik GmbH
Original Assignee
Softal Elektronik 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 Softal Elektronik GmbH filed Critical Softal Elektronik GmbH
Application granted granted Critical
Publication of US3708733A publication Critical patent/US3708733A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents

Definitions

  • ABSTRACT Primary Examiner-J. D. Miller Assistant Examiner-Harry E. Moose, Jr. Attorney-Williamson, Palmatier & Bains [5 7 ABSTRACT A method of improving the surface activity of electrically conductive carrier strips, to enhance their bonding properties.
  • the surface of the strip is subjected to a high frequency and high gradient alternating electrical field formed between two electrodes.
  • the carrier strip which forms one electrode is conducted over and in direct contact with a roller electrode which forms the other electrode and the surface of which comprises a solid dielectric material. The difficulties which occur when an air gap is present between the strip and the electrode are thereby avoided.
  • the present invention relates to methods for improving the surface activity of electrically conductive carrier strips, such as aluminum foils.
  • metal foils Before electrically conductive carrier strips, in particular metal foils can be printed on, varnished, coated and lined, they must be subjected to a preliminary treatment and degreased, in order to increase their adhering capability. A surface activation must take place which ensures that printing inks, coloring materials are accepted and are sufficiently securely joined to the metal foil.
  • the electrically conductive carrier strips which is to be activated, and which forms an electrode is generally conducted over electrically neutral and insulated transport or guiding rollers.
  • a driven rotating roller electrode which forms an opposite electrode to the carrier strip is arranged in the region of at least one of these guiding rollers, at a distance from the carrier strip to be treated.
  • at least two rollers, one transportor guiding roller and one roller electrode are required for the execution of this known process.
  • the gap between these two rollers must be set at an appropriate value, and to insert the carrier strip, it must be threaded carefully between the rollers. This operation can be decidedly difficult in the case of carrier strip activation apparatus having poor accessibility.
  • a correspondingly high degree of electrical energy must be applied in order to overcome this impedance, for the full activation of the selected surface. It has become known, in order to increase its surface activity, to subject anon-conductive synthetic plastics material foil to a preliminary treatment with roller electrodes, which are disposed in direct contact with the synthetic foil.
  • a guiding roller which forms one electrical pole, whereas a number of roller electrodes, which form the other electrical pole are applied to the other side of synthetic foil whilst it rotates around the guiding roller.
  • An electrical-spark discharge corona discharge
  • only electrically non-conductive carrier strips are treated by this other known process.
  • a method of improving the surface activity of electrically conductive carrier strips wherein the surface of the strip is subjected to a high frequency and high gradient alternating electrical field formed between two electrodes, and wherein the carrier strip which forms one electrode is conducted over and in direct contact with a roller electrode which forms the other electrode and the surface of which comprises a solid dielectric material.
  • the treated conductive carrier strip can assist in removing the heat produced in the roller electrode as a result of its direct contact with the roller electrode. This is not possible in the case of the presence of an air gap.
  • the heating of the treated carrier strip thereby produced also causes the vaporization of water and oil remnants. Therefore, the drying for example of printing inks, is assisted and no cold shock occurs in extruder coating the strip with synthetic plastics material.
  • the carrier strip to be treated may not only be treated on one of its two sides, but a process may be used in which the carrier strip is passed over and in direct contact with at least two of said roller electrodes rotating in opposite directions, in such manner that one of its surfaces contacts one roller and the other of its surfaces contacts the other roller.
  • roller electrode In order to increase the speed or degree of treatment, it is naturally possible to use more than one roller electrode to treat one surface of a carrier strip.
  • the'improvement or increase of the surface activity takes place as a result of various processes, which co-operate with one another to a greater or lesser degree, due to the effect of the high frequency alternating field namely, ion bombardment, electrode bombardment and corona discharge (spaced discharge).
  • the high frequency alternating field namely, ion bombardment, electrode bombardment and corona discharge (spaced discharge).
  • the increase in the surface activity can be mainly traced back to the ion bombardment in co-operation with the electron bombardment.
  • the high frequency alternating field also frees the foil of surface water and other impurities.
  • an electrical spark discharge takes place through the solid dielectric material, and, in fact, between the electrically conductive carrier strip, which forms one pole, and the roller electrode, which forms the other pole.
  • the carrier strip is earthed whereas the high frequency alternating field is applied to the roller electrode by means of an appropriate generator.
  • top and bottom as used herein refer to relative positions as shown in the drawing.
  • the strip is given reference 4, and is conducted over the top over at least one of the roller electrodes 1 or 2.
  • the carrier strip is given the reference 5, is shown in broken line, and is conducted over the bottom of at least one of the roller electrodes.
  • the carrier strip is given the reference 6, is shown in dashdotted line, and is conducted over at least two roller electrodes 1 and 2 in such manner that these rollers rotate in opposite directions. At least two roller electrodes are required in this last-mentioned method.
  • roller electrodes must be used.
  • the process in accordance with the invention is suitable for increasing the surface activity of the many different electrically conductive carrier strips.
  • the process may be used on conductive foils of metal, in particular of aluminum, compound foils consisting of non-metals and metals, or conductive paper, such as paper mixed with carbon.
  • the rollers are provided with a solid coating 3, having a relatively high dielectric constant.
  • a dielectric many different types of synthetic plastics materials may be used, such as epoxy resins, and polyester compounds, and also glass may be used.
  • a method of improving the surface activity of electrically conductive carrier strips wherein the surface of the strip is subjected to a high frequency and high gradient alternating electrical field formed between two electrodes, establishing the conductive carrier strip as one of said electrodes, establishing a roller as the other of said electrodes and wherein the peripheral surface of the roller comprises a solid dielectric material, and causing the conductive electrode strip to be conveyed toward and into direct contact with the dielectric surface of the electrode roller as the roller is revolved.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printing Methods (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US00118832A 1970-03-26 1971-02-25 Method of improving the surface activity of electrically conductive carrier strips Expired - Lifetime US3708733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702014646 DE2014646B1 (de) 1970-03-26 1970-03-26 Verfahren zur verbesserung der oberflaechenaktivitaet von elektrisch leitenden traegerbahnen insbesondere aluminium folien

Publications (1)

Publication Number Publication Date
US3708733A true US3708733A (en) 1973-01-02

Family

ID=5766400

Family Applications (1)

Application Number Title Priority Date Filing Date
US00118832A Expired - Lifetime US3708733A (en) 1970-03-26 1971-02-25 Method of improving the surface activity of electrically conductive carrier strips

Country Status (8)

Country Link
US (1) US3708733A (de)
CH (1) CH523741A (de)
DE (1) DE2014646B1 (de)
FI (1) FI51500C (de)
FR (1) FR2084154A5 (de)
GB (1) GB1281496A (de)
NL (1) NL7101756A (de)
SE (1) SE380740B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973132A (en) * 1974-04-27 1976-08-03 Softal Elektronik Gmbh Apparatus for the treatment of non-conductive foils or like thin sheeting
US4051044A (en) * 1974-12-30 1977-09-27 Softal Elektronik Erik Blumenfeld Kg Electric discharge surface treating apparatus
US6007784A (en) * 1997-07-11 1999-12-28 3Dt, Inc. Electric discharge surface treating electrode and system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332866C2 (de) * 1993-09-27 1997-12-18 Fraunhofer Ges Forschung Direkte Oberflächenbehandlung mit Barrierenentladung
DE10057293C1 (de) * 2000-11-17 2002-05-23 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Herstellung einer Aluminiumfolie aus einem Aluminiumwerkstoff

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483374A (en) * 1966-01-24 1969-12-09 Alusuisse Apparatus for the surface treatment of workpieces by electrical discharges

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483374A (en) * 1966-01-24 1969-12-09 Alusuisse Apparatus for the surface treatment of workpieces by electrical discharges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Guide to Corona Film Treating May 1961 Article in Plastics Engineering by Heide et al. pp 199 206. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973132A (en) * 1974-04-27 1976-08-03 Softal Elektronik Gmbh Apparatus for the treatment of non-conductive foils or like thin sheeting
US4051044A (en) * 1974-12-30 1977-09-27 Softal Elektronik Erik Blumenfeld Kg Electric discharge surface treating apparatus
US6007784A (en) * 1997-07-11 1999-12-28 3Dt, Inc. Electric discharge surface treating electrode and system

Also Published As

Publication number Publication date
CH523741A (de) 1972-06-15
GB1281496A (en) 1972-07-12
FI51500C (fi) 1977-01-10
FR2084154A5 (de) 1971-12-17
DE2014646B1 (de) 1971-07-15
SE380740B (sv) 1975-11-17
NL7101756A (de) 1971-09-28
FI51500B (de) 1976-09-30

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