CH645823A5 - Process for producing an electroconductive coating on an at least superficially insulating body - Google Patents
Process for producing an electroconductive coating on an at least superficially insulating body Download PDFInfo
- Publication number
- CH645823A5 CH645823A5 CH881879A CH881879A CH645823A5 CH 645823 A5 CH645823 A5 CH 645823A5 CH 881879 A CH881879 A CH 881879A CH 881879 A CH881879 A CH 881879A CH 645823 A5 CH645823 A5 CH 645823A5
- Authority
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- Switzerland
- Prior art keywords
- dispersion
- solvent
- electrically conductive
- plastic
- conductor particles
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 17
- 238000000576 coating method Methods 0.000 title claims description 11
- 239000011248 coating agent Substances 0.000 title claims description 8
- 239000006185 dispersion Substances 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 16
- 239000004033 plastic Substances 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 4
- 239000012799 electrically-conductive coating Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims 1
- 230000001680 brushing effect Effects 0.000 claims 1
- 238000007598 dipping method Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000002791 soaking Methods 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 210000003298 dental enamel Anatomy 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/18—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being embedded in an insulating material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
- H05K1/095—Dispersed materials, e.g. conductive pastes or inks for polymer thick films, i.e. having a permanent organic polymeric binder
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
- H05K3/188—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by direct electroplating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Conductive Materials (AREA)
- Surface Heating Bodies (AREA)
- Resistance Heating (AREA)
- Manufacturing Of Electric Cables (AREA)
- Paints Or Removers (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines elektrisch leitenden Belages auf einem mindestens oberflächlich isolierenden Körper, bei welchem auf die Körperoberfläche eine Dispersion von Leiterpartikeln und einer Trägermittelflüssigkeit aufgetragen und zur Trocknung gebracht wird. The invention relates to a method for producing an electrically conductive covering on an at least superficially insulating body, in which a dispersion of conductor particles and a carrier liquid is applied to the body surface and brought to drying.
Verfahren der soeben kurz beschriebenen, allgemeinen Art sind aus der deutschen Patentschrift 2 151 626 bekannt. Methods of the general type just described are known from German Patent 2,151,626.
Bei dem an sich sehr vorteilhaften Verfahren nach dem Stande der Technik tritt mitunter die Schwierigkeit auf, dass die Dispersion aus Leiterpartikeln und der Trägerflüssigkeit nicht beständig ist, da als Trägerflüssigkeit wiederum eine Dispersion, nämlich eine wässrige Kunstharzdispersion ver- The very advantageous method according to the prior art sometimes has the difficulty that the dispersion of conductor particles and the carrier liquid is not stable, since the carrier liquid is again a dispersion, namely an aqueous synthetic resin dispersion.
2 2nd
wendet wird. Ausserdem müssen nach dem bekannten Verfahren aufgetragene, leitende Beläge zur Trocknimg erhitzt oder gebacken werden und benötigen eine vergleichsweise lange Trocknungszeit, was die Herstellung komplizieren und 5 verteuern kann, insbesondere dann, wenn eine grössere Dik-ke der Beläge gewünscht wird. Schliesslich kann es vorkommen, dass die bekannten Beläge hart oder spröde werden und eine schlechte Haftfähigkeit gegenüber ihrer Unterlage besitzen. Dies führt, wenn ein elektrischer Strom durch die io Beläge geführt werden soll, zu heissen Stellen wegen örtlicher Querschnittseinschnürungen durch Risse. is applied. In addition, conductive coatings applied according to the known method have to be heated or baked to dry and require a comparatively long drying time, which can complicate the manufacture and make it more expensive, especially if a larger thickness of the coatings is desired. Finally, it can happen that the known coverings become hard or brittle and have poor adhesion to their base. If an electric current is to be passed through the io pads, this leads to hot spots due to local cross-sectional constrictions due to cracks.
Durch die Erfindung soll die Aufgabe gelöst werden, ein Verfahren zur Herstellung eines elektrisch leitenden Belages auf einem mindestens oberflächlich isolierenden Körper so 15 auszugestalten, dass ohne besondere Vorrichtungen auch Leitbeläge grösserer Dicke unter Verwendung einer beständigen Leiterpartikeldispersion gebildet werden können, wobei die Herstellungszeit gegenüber den Verhältnissen bei bekannten Herstellungsverfahren stark verringert ist. 20 Es sei hier ausdrücklich erwähnt, dass das Anwendungsgebiet der Erfindung die Herstellung verhältnismässig ausgedehnter Körper, beispielsweise die Herstellung von Heizelementen für die Raumheizung oder von Abschirmschalen oder Antennenschalen oder dergleichen ist, so dass eine Ver-25 kürzung der Herstellungsdauer in der Serienfertigung zu einer Verringerung des Raumbedarfs führt. The object of the invention is to achieve a method for producing an electrically conductive coating on an at least superficially insulating body in such a way that conductive coatings of greater thickness can also be formed without special devices using a constant conductor particle dispersion, the production time compared to the conditions is greatly reduced in known manufacturing processes. It should be expressly mentioned here that the field of application of the invention is the production of relatively extensive bodies, for example the production of heating elements for space heating or of shielding shells or antenna shells or the like, so that a shortening of the production time in series production leads to a reduction of space requirements.
Die angegebene Aufgabe wird erfindungsgemäss dadurch gelöst, dass als Trägermittelflüssigkeit eine Lösung eines Thermoplast- und/oder Duroplastkunststoffes in einem 30 Lösungsmittel verwendet wird. The stated object is achieved according to the invention in that a solution of a thermoplastic and / or thermoset plastic in a solvent is used as the carrier liquid.
Zur Vorbereitung der Dispersion können zunächst die Leiterpartikel in dem Lösungsmittel dispergiert werden und in dieser Dispersion wird dann der Kunststoff gelöst. Es ist jedoch auch möglich, zur Vorbereitung der Dispersion zu-35 nächst den Kunststoff in dem Lösungsmittel zu lösen und in der Lösung dann die Leiterpartikel zu dispergieren. To prepare the dispersion, the conductor particles can first be dispersed in the solvent and the plastic is then dissolved in this dispersion. However, it is also possible to first dissolve the plastic in the solvent to prepare the dispersion and then to disperse the conductor particles in the solution.
Es zeigt sich, dass das Lösungsmittel nach Auftragen des Belages ausserordentlich rasch verdampft, auch wenn verhältnismässig dicke Beläge hergestellt werden, wobei solche 40 Beläge gut durchtrocknen, ohne dass die Trocknungszeit durch eine sogenannte Hautbildung unzuträglich verlängert wird. Nach dem Verdampfen des Lösungsmittels bleibt der leitende Belag gut haftend auf dem betreffenden Körper zurück und enthält durch den Thermoplastkunststoff oder 45 Duroplastkunststoff miteinander verklebte oder in diesem Kunststoff gehalterte Leiterpartikel in hochgleichmässiger Verteilung. It turns out that the solvent evaporates extremely quickly after application of the covering, even if comparatively thick coverings are produced, such coverings drying thoroughly without the drying time being lengthened unreasonably by a so-called skin formation. After the evaporation of the solvent, the conductive coating remains firmly adhering to the body in question and contains conductor particles bonded to one another or held in this plastic by the thermoplastic or 45 thermoset in a highly uniform distribution.
Soll der elektrisch leitende Belag ein Flächenheizbelag sein, so wird als Thermoplastkunststoff oder Duroplast-50 kunststoff selbstverständlich ein Material gewählt, das bei den zu erwartenden Betriebstemperaturen beständig ist. Eine beginnende Erweichung eines Thermoplastkunststoff-Matrixbelages ist durchaus erwünscht, da etwa auftretende Wärmedehnungen ausgeglichen und thermische Spannungen 55 vermieden werden können. If the electrically conductive covering is to be a surface heating covering, a material that is resistant to the expected operating temperatures is of course chosen as the thermoplastic or thermoset 50 plastic. Beginning softening of a thermoplastic matrix coating is absolutely desirable, since any thermal expansions that occur can be compensated for and thermal stresses 55 can be avoided.
Im übrigen sei bezüglich weiterer, vorteilhafter Merkmale des hier vorgeschlagenen Verfahrens auf die anliegenden Ansprüche verwiesen, deren Inhalt hierdurch ausdrücklich zum Bestandteil der Beschreibung gemacht wird, ohne den 60 Wortlaut an dieser Stelle zu wiederholen, um die Beschreibung zu verkürzen und zu vereinfachen. In addition, with regard to further advantageous features of the method proposed here, reference is made to the appended claims, the contents of which are hereby expressly made part of the description without repeating the text at this point in order to shorten and simplify the description.
Nachfolgend werden einige praktische Ausführungsbeispiele beschrieben. Some practical embodiments are described below.
65 Beispiel I 65 Example I
Bei der Herstellung eines tafelförmigen oder plattenför-migen Flächenheizelementes verfährt man zweckmässig fol-gendermassen: Auf einer Metalltafel oder Metallplatte, wel In the manufacture of a sheet-like or plate-shaped surface heating element, the following procedure is expediently carried out: on a metal plate or plate, which
che mit einer isolierenden Emailleschicht versehen ist, werden mit einem Klebebelag versehene Metallstreifen als Anschlusselektroden im Abstand von einander parallel laufend befestigt und mit Anschlussleitungen in Verbindung gebracht, die an den Metallstreifen festgelötet werden. Unter Verwendung einer entsprechend geformten Maske wird dann der elektrisch leitende Belag als Heizleiterbelag aufgespritzt. Das mittels einer Spritzeinrichtung aufgetragene Material ist eine Dispersion aus Leiterpartikeln in Form von Graphit und einer Methylenchlorid-Polystyrol-Lösung. Bei der Vorbereitung der Suspension wird zunächst das Polystyrol im Methylenchlorid gelöst und dann das Graphit in der Flüssigkeit dispergiert. surface is provided with an insulating enamel layer, metal strips provided with an adhesive coating are attached as connecting electrodes running parallel and at a distance from one another and connected to connecting lines which are soldered to the metal strips. Using an appropriately shaped mask, the electrically conductive covering is then sprayed on as a heating conductor covering. The material applied by means of a spray device is a dispersion of conductor particles in the form of graphite and a methylene chloride-polystyrene solution. When preparing the suspension, the polystyrene is first dissolved in methylene chloride and then the graphite is dispersed in the liquid.
Man lässt nun den hergestellten Belag trocknen, was innerhalb weniger Minuten geschieht. Sodann wird eine Isolationsschicht in Form einer Polyurethan-Schaumstoffschicht aufgebracht, um eine bevorzugte Wärmeabgabe an der Me-tallplattenoberfläche zu erhalten. Es sei erwähnt, dass der elektrisch leitende Belag in mehreren Schichten aufeinanderfolgend aufgebracht werden kann, da der Lösungsmittelgehalt der verwendeten Dispersion die jeweils darunterliegende, bereits getrocknete Belagschicht anlöst und dadurch zu einer innigen Verbindung zwischen den Schichten führt. Auch können Teile eines bereits gebildeten Belages zur Justierung des elektrischen Widerstandes oder zur Erzielung einer bestimmten Energieverteilung auf der mit dem Belag versehenen Oberfläche unter Verwendung des Lösungsmittels wieder entfernt werden. Allow the manufactured topping to dry, which happens within a few minutes. An insulation layer in the form of a polyurethane foam layer is then applied in order to obtain a preferred heat emission on the metal plate surface. It should be mentioned that the electrically conductive covering can be applied in several layers in succession, since the solvent content of the dispersion used dissolves the already dried covering layer underneath and thereby leads to an intimate connection between the layers. Parts of an already formed coating can also be removed again using the solvent in order to adjust the electrical resistance or to achieve a certain energy distribution on the surface provided with the coating.
In Abwandlung des soeben beschriebenen Ausführungsbeispiels kann statt Graphit auch Russ in feiner Verteilung verarbeitet werden. In a modification of the embodiment just described, carbon black can also be processed in a fine distribution instead of graphite.
In weiterer Abwandlung kann der Belag aufgestrichen oder aufgerollt oder durch Tauchung oder Tränkung gebildet werden. In jedem Falle zeichnet sich der Belag aufgrund der hohen Beständigkeit der verarbeiteten Dispersion durch gleichförmige Verteilung der Leiterpartikel und gute Abrieb- In a further modification, the covering can be spread on or rolled up or formed by immersion or impregnation. In any case, due to the high resistance of the processed dispersion, the covering is characterized by uniform distribution of the conductor particles and good abrasion resistance.
3 645 823 3,645,823
festigkeit aus. Der Belag ist wasserabweisend und durch eine gute Haftfähigkeit gegenüber Holz, Kunststoff, Metall, Emaille, Keramik, Porzellan, Stein, Glas usw. gekennzeichnet. strength from. The covering is water-repellent and characterized by good adhesion to wood, plastic, metal, enamel, ceramic, porcelain, stone, glass, etc.
s Als zur Bildung der Trägermittelflüssigkeit aufzulösende Kunststoffe eignen sich neben dem bereits erwähnten Polystyrol beispielsweise Polytetrafluoräthylen oder Duroplaste wie Acrylharz, Polyester oder dergleichen oder aber Mischkunststoffe wie Polystyrol-Polyesterharzgemische. s In addition to the polystyrene already mentioned, suitable plastics for dissolving the carrier liquid are, for example, polytetrafluoroethylene or thermosets such as acrylic resin, polyester or the like, or mixed plastics such as polystyrene-polyester resin mixtures.
10 10th
Beispiel II Example II
Zur Herstellung eines mit einem metallischen Abschirmbelag versehenen Kunststoffgehäuses wird auf dieses ein Leiterbelag ähnlich wie bei dem zuvor beschriebenen Beispiel 15 aufgespritzt. Die verarbeitete Dispersion zeichnet sich durch einen hohen Gehalt an Leiterpartikeln im Verhältnis zu dem gelösten Kunststoff aus. Allgemein liegt das Verhältnis von Leiterpartikeln zu Kunststoffanteil im Bereich von 7 : 1 bis 2: 1. Im vorliegenden Ausführungsbeispiel wird ein Verhält-20 nis nahe 2 :1 von Leiterpartikel zu Kunststoffanteil verwendet. Bezüglich des Lösungsmittelgehaltes ergibt es sich, dass 5%ige bis 10%ige Suspersion eine gute Verarbeitbarkeit ergeben. In order to produce a plastic housing provided with a metallic shielding covering, a conductor covering similar to that in Example 15 described above is sprayed onto this. The processed dispersion is characterized by a high content of conductor particles in relation to the dissolved plastic. In general, the ratio of conductor particles to plastic content is in the range from 7: 1 to 2: 1. In the present exemplary embodiment, a ratio of 20 nis close to 2: 1 of conductor particles to plastic content is used. With regard to the solvent content, it follows that a 5% to 10% dispersion gives good processability.
25 Beispiel III 25 Example III
Zur Herstellung eines Flächenheizelementes wird entsprechend verfahren wie bei Beispiel I. Als Kunststoff in der Leiterpartikel-Trägermittelflüssigkeit-Dispersion kommt jedoch ein Duroplastkunststoff zur Anwendimg, welcher in 30 seiner noch nicht vollständig vernetzten Form gelöst ist. The procedure for producing a surface heating element is the same as in Example I. However, a thermosetting plastic is used as plastic in the conductor particle carrier medium liquid dispersion, which is dissolved in its not yet fully cross-linked form.
Nach dem Auftragen des Belages wird dieser durch An-schluss der Elektroden an eine Stromquelle erhitzt. Bei der Erhitzung vernetzt sich der Duroplast und geht in die «Re-sit»-Form über. Der fertige Heizbelag zeichnet sich durch 35 hohe mechanische Widerstandsfähigkeit über nahezu unbegrenzte Zeitdauer hinweg aus. After the coating has been applied, it is heated by connecting the electrodes to a power source. When heated, the thermoset crosslinks and changes to the “re-sit” shape. The finished heating surface is characterized by 35 high mechanical resistance over an almost unlimited period of time.
Claims (11)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782842519 DE2842519C2 (en) | 1978-09-29 | 1978-09-29 | Process for coating electrically insulating surfaces with an electrically conductive plastic layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH645823A5 true CH645823A5 (en) | 1984-10-31 |
Family
ID=6050896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH881879A CH645823A5 (en) | 1978-09-29 | 1979-10-01 | Process for producing an electroconductive coating on an at least superficially insulating body |
Country Status (7)
| Country | Link |
|---|---|
| AU (1) | AU5128879A (en) |
| CH (1) | CH645823A5 (en) |
| DE (1) | DE2842519C2 (en) |
| FR (1) | FR2437250A1 (en) |
| GB (1) | GB2035843A (en) |
| NL (1) | NL7907129A (en) |
| SE (1) | SE7908011L (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58143170A (en) * | 1982-02-19 | 1983-08-25 | Mitsubishi Electric Corp | Distributor for restraining noise wave in internal-combustion engine |
| CH659908A5 (en) * | 1982-05-26 | 1987-02-27 | Bbc Brown Boveri & Cie | METHOD FOR INCREASING THE ELECTRICAL SURFACE CONDUCTIVITY OF A BODY. |
| FR2539245A1 (en) * | 1983-01-06 | 1984-07-13 | Bruguet Jean Louis | Earth screen based on composite materials |
| FR2540537B1 (en) * | 1983-02-07 | 1985-08-16 | Sofrelop | METHOD FOR COMBATING MOISTURE OF WALLS SUBJECT TO AN ELECTRIC FIELD |
| EP0117269B1 (en) * | 1983-02-26 | 1988-05-25 | General Electric Company | Coating composition |
| GB2144138B (en) * | 1983-07-30 | 1986-10-15 | T & N Materials Res Ltd | Electrically conductive layer |
| GB8320607D0 (en) * | 1983-07-30 | 1983-09-01 | T & N Materials Res Ltd | Housing for electrical/electronic equipment |
| US4515830A (en) * | 1983-11-29 | 1985-05-07 | Rca Corporation | Solvent-cast capacitive high density information disc |
| US4644092A (en) * | 1985-07-18 | 1987-02-17 | Amp Incorporated | Shielded flexible cable |
| BG41887A1 (en) * | 1985-12-24 | 1987-09-15 | Krstev | Electric resistance matter |
| GB8700966D0 (en) * | 1987-01-17 | 1987-02-18 | Waddingtons Cartons Ltd | Receptor films |
| DE4422133A1 (en) * | 1994-06-28 | 1996-01-04 | Hoffmann Josef | Anti static protection for vehicle |
| US6218624B1 (en) | 1994-07-05 | 2001-04-17 | Belden Wire & Cable Company | Coaxial cable |
| ATE378802T1 (en) * | 2003-08-14 | 2007-11-15 | Doerken Ewald Ag | REFLECTION LAYER |
| FR2875369B1 (en) * | 2004-09-15 | 2006-11-24 | Thermor Ind Soc Par Actions Si | DEVICE FORMING HEAT BODY |
| DE102006001639A1 (en) * | 2006-01-11 | 2007-07-12 | Degussa Gmbh | Coating of substrates, useful as wallpaper, comprises supplying a substrate, applying a composition on one side of the substrate, drying the applied composition and applying a coating on the coated side of the substrate |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3412358A (en) * | 1966-09-09 | 1968-11-19 | Gulton Ind Inc | Self-regulating heating element |
| FR2217895A1 (en) * | 1973-02-14 | 1974-09-06 | Donetsu Kogyo Kk | Electrical heating element prodn. - by coating heat-resistant non-conductive support with mixt of organopolysiloxane, graphite powder and organic solvent |
| US4070200A (en) * | 1976-04-12 | 1978-01-24 | E. I. Du Pont De Nemours And Company | Compositions containing diethylene glycol ether |
-
1978
- 1978-09-29 DE DE19782842519 patent/DE2842519C2/en not_active Expired
-
1979
- 1979-09-19 GB GB7932492A patent/GB2035843A/en not_active Withdrawn
- 1979-09-25 NL NL7907129A patent/NL7907129A/en not_active Application Discontinuation
- 1979-09-27 SE SE7908011A patent/SE7908011L/en not_active Application Discontinuation
- 1979-09-28 AU AU51288/79A patent/AU5128879A/en not_active Abandoned
- 1979-09-28 FR FR7924332A patent/FR2437250A1/en active Pending
- 1979-10-01 CH CH881879A patent/CH645823A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU5128879A (en) | 1980-04-03 |
| SE7908011L (en) | 1980-03-30 |
| NL7907129A (en) | 1980-04-01 |
| DE2842519A1 (en) | 1980-04-17 |
| FR2437250A1 (en) | 1980-04-25 |
| GB2035843A (en) | 1980-06-25 |
| DE2842519C2 (en) | 1983-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |