DE1015081B - Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics - Google Patents

Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics

Info

Publication number
DE1015081B
DE1015081B DEM25951A DEM0025951A DE1015081B DE 1015081 B DE1015081 B DE 1015081B DE M25951 A DEM25951 A DE M25951A DE M0025951 A DEM0025951 A DE M0025951A DE 1015081 B DE1015081 B DE 1015081B
Authority
DE
Germany
Prior art keywords
plastics
transparent
electrically conductive
graphite
production
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.)
Pending
Application number
DEM25951A
Other languages
German (de)
Inventor
Dipl-Phys Erich Unger
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.)
Metrawatt AG
Original Assignee
Metrawatt 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
Application filed by Metrawatt AG filed Critical Metrawatt AG
Priority to DEM25951A priority Critical patent/DE1015081B/en
Publication of DE1015081B publication Critical patent/DE1015081B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/043Improving the adhesiveness of the coatings per se, e.g. forming primers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/06Coating with compositions not containing macromolecular substances
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04Coating
    • C08J7/044Forming conductive coatings; Forming coatings having anti-static properties
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20Conductive material dispersed in non-conductive organic material
    • H01B1/24Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Laminated Bodies (AREA)

Description

Verfahren zur Herstellung einer durchsichtigen, elektrisch leitenden, festhaftenden Schicht zur Ableitung elektrostatischer Aufladungen von hochisolierenden und stark polarisierbaren Kunststoffen Die Verwendung von Kunstharzglas als Skalenglas einfacher Meßinstrumente bietet gegenüber gewöhnlichem Glas die bekannten Vorteile einer wesentlich erhöhten Bruchsicherheit, einer einfacheren Bearbeitbarkeit und vielseitigere Gestaltungsmöglichkeiten. Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating ones and highly polarizable plastics The use of synthetic resin glass as a graduated glass simple measuring instruments offers the known advantages over ordinary glass a significantly increased break resistance, easier machinability and more versatile design options.

Jedoch scheitert die Verwendung von gewöhnlichem Kunstharzglas häufig an der bei Berührung dieses Glases auftretenden elektrostatischen Aufladung. Versucht man z.B., das Kunstharzglas abzuwischen, so treten elekfrostatische Kräfte zwischen Glas und Zeiger auf, welche eine brauchbare Messung oft für viele Stunden unmöglich machen. Meist wirken schon bei einfacher Berührung, infolge des hohen Isolationswiderstandes und der hohen Polarisierbarkeit, Kräfte in der Größenordnung von einigen Milligramm auf den Zeiger. However, the use of ordinary synthetic resin glass often fails the electrostatic charge that occurs when this glass is touched. Tries For example, if you wipe the synthetic resin glass, electrostatic forces intervene Glass and pointer on which a usable measurement is often impossible for many hours do. Most of the time they work with a simple touch, due to the high insulation resistance and the high polarizability, forces on the order of a few milligrams on the pointer.

Es ist seit langem bekannt, diese Aufladungen durch Aufbringen von Glyzerin oder anderen schwer verdampfbaren und leitenden Flüssigkeiten zu unterbinden. Verschiedene solcher Produkte sind auch im Handel erhältlich. Diese Stoffe haben den Vorzug, daß sie die Transparenz des Skalenglases auch bei relativ großen Schichtdicken kaum beeinträchtigen, da hier Ionen die Leitungsträger sind. Ein entscheidender Nachteil dieser Schichten ist jedoch der Umstand, daß sie spätestens nach einigen Monaten infolge der Verdunstung der Flüssigkeit unwirksam werden. It has long been known to produce these charges by applying To prevent glycerine or other difficult to evaporate and conductive liquids. Various such products are also commercially available. These substances have the advantage that they maintain the transparency of the scale glass even with relatively large layer thicknesses hardly affect, since ions are the conduction carriers here. A crucial one The disadvantage of these layers, however, is the fact that they are at the latest after a few Months due to evaporation of the liquid.

Ein anderer Lösungsweg ist der Beschuß des Ixunstharzes mit energiereichen Strahlen, welche Störstellen als Leitungszentren bilden. Die Leitfähigkeit des Kunstharzes nimmt jedoch auch bei sehr starkem Beschuß nur wenig zu, so daß sich die Aufladung vermindern, jedoch nicht beseitigen läßt. Another approach is to bombard the synthetic resin with high-energy Rays which form imperfections as conduction centers. The conductivity of the synthetic resin however, increases only a little even with very strong bombardment, so that the charge can be reduced, but not eliminated.

Schließlich ist es auch noch bekannt, durch Aufdampfen einer dünnen Metallschicht einen leitenden Üheriug herzustellen. Diese Schichten beheben bei geeigneter Dimensionierung die elektrostatischen Aufladungen vollständig und dauerhaft. Eine große Schwierigkeit besteht jedoch in der fabrikatorischen Dosierung der Schichtdicke. Ist die Schicht zu dick, so ist infolge der Elektronenleibung die Lichtabsorption zu groß. Bei einer zu dünnen Schicht tritt infolge von Inselbildung keine elektrische Leitung ein. Außerdem sind solche Aufdampfschichten nicht sehr wischfest. Finally it is also known by vapor deposition of a thin Metal layer to produce a conductive Üheriug. These layers fix at suitably dimensioned the electrostatic charges completely and permanently. A great difficulty, however, is the metering of the layer thickness in the factory. If the layer is too thick, the light absorption is due to the electron exposure too large. If the layer is too thin, no electrical occurs due to island formation Line on. In addition, such vapor-deposited layers are not very resistant to wiping.

Sie erfordern eine kostspielige Hochvakuumanlage und geschultes Bedienungspersonal. They require an expensive high vacuum system and trained operating personnel.

Diese Nachteile werden bei einem Verfahren zur Herstellung einer durchsichtigen, elektrisch leitenden, festhaftenden Schicht zur Ableitung elektrostatischer Aufladungen von hochisolierenden und stark polarisierbaren Kunststoffen dadurch vermieden, daß erfindungsgemäß diese Schicht durch Auftragen von -Graphit hergestellt wird. These disadvantages are in a method for making a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic Charging of highly insulating and strongly polarizable plastics as a result avoided that, according to the invention, this layer is produced by applying graphite will.

Das hohe Gleitvermögen der hexagonalen Kristall- netzehene erzeugt beim Auftragen des z.B. pulverförmigen Graphits eine drahtzaunähnliche, mehrlagige leitende Schicht, welche nur einen geringen Bruchteil der Fertigungskosten verursacht wie etwa das Aufdampfen. The high sliding properties of the hexagonal crystal netzehene generated When applying the e.g. powdery graphite a wire fence-like, multi-layer conductive layer, which causes only a small fraction of the manufacturing costs such as vapor deposition.

Beispiel für die praktische Anwendung bei Kunstharzgläsern: Die zu belegende Seite des Kunstharzglases wird mit kolloidalem Graphit bestreut. Diese Schicht wird mit einem Wollappen unter großem Druck »eingerieben«. Man schüttelt danach den überschüssigen Graphit ab und poliert die anfänglich. graue Scheibe so lange, bis das Glas etwa 98°/o seiner ursprünglichen Transparenz erreicht hat. Example of practical use in synthetic resin glasses: The zu The covering side of the synthetic resin glass is sprinkled with colloidal graphite. These The layer is "rubbed in" with a woolen cloth under great pressure. One shakes then the excess graphite and polish the initially. gray disk like that long until the glass has reached about 98% of its original transparency.

Natürlich ist die Anwendung einer so hergestellten antistatischen Schicht nicht nur auf die im Beispiel beschriebene Verwendung bei Kunstharzgläsern beschränkt. Zum Beispiel bedingen die elektrostatischen Aufladungen auch die Anziehung von Staub bei Kunststoffen im allgemeinen und bei verschiedenen Lacksoften. Auch hier läßt sich die Störung durch Auftragen einer Graphitschicht beseitigen. Of course, the application of such a manufactured antistatic Layer not only on the use described in the example for synthetic resin glasses limited. For example, the electrostatic charges also cause attraction of dust in plastics in general and in various paint softeners. Even here the disturbance can be eliminated by applying a graphite layer.

Claims (5)

PATENTANSPR0CJIE 1. Verfahren zur Herstellung einer durchsichtigen, elektrisch leitenden, festhaftenden Schicht zur Ableitung elektrostatischer Aufladungen von hochisolierenden und stark polarisierbaren Kunststoffen, dadurch gekennzeichnet, daß diese Schicht durch Auftragen von Graphit hergestellt wird. PATENT APPLICATION 1. Process for the production of a transparent, electrically conductive, firmly adhering layer for dissipating electrostatic charges of highly insulating and strongly polarizable plastics, characterized by that this layer is made by applying graphite. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß hierzu kolloidaler Graphit verwendet wird. 2. The method according to claim 1, characterized in that this colloidal graphite is used. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Graphit unter großem Druck aufgetragen wird. 3. The method according to claim 1 or 2, characterized in that the graphite is applied under great pressure. 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Graphit durch Einreiben aufgetragen wird. 4. The method according to claim 1 to 3, characterized in that the Graphite is applied by rubbing. 5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß der überschüssige Graphit von dem zu belegenden Kunststoff abpoliert wird, bis etwa 90... 99 0/o der ursprünglichen Transparenz bzw. Sichtbarkeit des Stoffes erreicht sind. 5. The method according to claim 1 to 4, characterized in that the Excess graphite is polished off the plastic to be covered until about 90 ... 99 0 / o of the original transparency or visibility of the substance is achieved are.
DEM25951A 1955-01-31 1955-01-31 Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics Pending DE1015081B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM25951A DE1015081B (en) 1955-01-31 1955-01-31 Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM25951A DE1015081B (en) 1955-01-31 1955-01-31 Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics

Publications (1)

Publication Number Publication Date
DE1015081B true DE1015081B (en) 1957-09-05

Family

ID=7299687

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM25951A Pending DE1015081B (en) 1955-01-31 1955-01-31 Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics

Country Status (1)

Country Link
DE (1) DE1015081B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223910B (en) * 1960-09-28 1966-09-01 Siemens Ag Process for the production of printed circuits on insulating carriers
DE2211115A1 (en) * 1972-03-08 1973-09-20 Auergesellschaft Gmbh ANTISTATIC TRANSPARENT SCALE CAP MADE OF PLASTIC FOR MEASURING INSTRUMENTS
DE2706475A1 (en) * 1977-02-16 1978-08-17 Kabel Metallwerke Ghh Graphite layer application on cable insulation - involves series of rotating drums containing powder and several smoothing devices
DE102022119490A1 (en) 2022-08-03 2024-02-08 Ingo Schneider Production of carbon-coated plastic films and plastic films

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223910B (en) * 1960-09-28 1966-09-01 Siemens Ag Process for the production of printed circuits on insulating carriers
DE2211115A1 (en) * 1972-03-08 1973-09-20 Auergesellschaft Gmbh ANTISTATIC TRANSPARENT SCALE CAP MADE OF PLASTIC FOR MEASURING INSTRUMENTS
DE2706475A1 (en) * 1977-02-16 1978-08-17 Kabel Metallwerke Ghh Graphite layer application on cable insulation - involves series of rotating drums containing powder and several smoothing devices
DE102022119490A1 (en) 2022-08-03 2024-02-08 Ingo Schneider Production of carbon-coated plastic films and plastic films

Similar Documents

Publication Publication Date Title
CH625054A5 (en)
DE1015081B (en) Process for the production of a transparent, electrically conductive, firmly adhering layer for the dissipation of electrostatic charges from highly insulating and strongly polarizable plastics
DE2538331C3 (en) Liquid crystal display element
DE1464870A1 (en) Process for the production of electrical capacitors
DE2434889B2 (en) LIQUID CRYSTAL DISPLAY ELEMENT
DE2437636A1 (en) Nematic liquid crystal indicator cell - has soda glass electrodes coated with silica to reduce cost and improve stability
DE2613924B2 (en) Process for manufacturing a field effect liquid crystal display cell
DE1923645A1 (en) Coating process for optical lenses and the like.
EP0278021A2 (en) Resistance strain gauges with a thin discontinuous metal-film
DE2050556C3 (en) Process for the production of a highly refractive, optically homogeneous and absorption-free oxide layer
DE69206843T2 (en) Process for producing a color filter and color electro-optical device
DE69300762T2 (en) Antistatic film and manufacturing method.
DE2003802B2 (en) Process for the production of an electroluminescent body and electroluminescent body produced thereafter
DE102018109337A1 (en) Method for producing a TCO layer and article with a TCO coating
DE2137968A1 (en) Method of manufacturing an electro-optical switch
DE921719C (en) Instrument glass with conductive layer
DE1621246C3 (en)
DE883481C (en) Process for the production of photoelectric cells
DE949724C (en) Process for generating characters that only become visible when breathing on
DE2211115C3 (en) Transparent scale cap made of plastic for measuring instruments
DE841625C (en) Process for the production of reflection-reducing layers, e.g. B. on glass
DE2028089A1 (en) Electronic screen device
DE834003C (en) Coating layers on optical surfaces, in particular glass surfaces
DE1696111A1 (en) Plastic objects with an antistatic layer
DE816909C (en) Eye-catching glass and process for its manufacture