DE19722713C1 - Flüssiges Leitgummi - Google Patents

Flüssiges Leitgummi

Info

Publication number
DE19722713C1
DE19722713C1 DE1997122713 DE19722713A DE19722713C1 DE 19722713 C1 DE19722713 C1 DE 19722713C1 DE 1997122713 DE1997122713 DE 1997122713 DE 19722713 A DE19722713 A DE 19722713A DE 19722713 C1 DE19722713 C1 DE 19722713C1
Authority
DE
Germany
Prior art keywords
carbon
mats
conductive liquid
containing conductive
liquid rubber
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 - Fee Related
Application number
DE1997122713
Other languages
English (en)
Inventor
Ruediger Vortriede
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1997122713 priority Critical patent/DE19722713C1/de
Application granted granted Critical
Publication of DE19722713C1 publication Critical patent/DE19722713C1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/785—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • C09J9/02—Electrically-conducting adhesives
    • 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
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • 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
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/24—Reinforcing the conductive pattern
    • H05K3/245—Reinforcing conductive patterns made by printing techniques or by other techniques for applying conductive pastes, inks or powders; Reinforcing other conductive patterns by such techniques
    • H05K3/247—Finish coating of conductors by using conductive pastes, inks or powders
    • H05K3/249—Finish coating of conductors by using conductive pastes, inks or powders comprising carbon particles as main constituent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/032—Conductive polymer; Rubber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2207/00—Connections
    • H01H2207/008—Adhesive means; Conductive adhesive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/062—Maintenance or repair facilities
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/03—Conductive materials
    • H05K2201/0302—Properties and characteristics in general
    • H05K2201/0314—Elastomeric connector or conductor, e.g. rubber with metallic filler

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Contacts (AREA)

Description

I. Problematik
Die Problematik ist die nachlassende Leitfähigkeit der Schaltkontakte von Tastenmatten (wie sie in Fernbedienungen, Codesendern, Handytastaturen etc. vorkommen) durch Rekristallisation oder starke Beanspruchung.
II. Aufgabe
Die Aufgabe bestand in der Bereitstellung einer Flüssigkeit, die sich mit der Kontaktfläche verbindet, und die es möglich macht, die Schaltkontakte von Tastenmatten wieder funktionsfähig zu machen.
III. Anforderungen
Die Anforderungen an die Flüssigkeit sollen wie folgend aufgezählt sein.
  • 1. Gute Leitfähigkeit
  • 2. Dünnflüssig
  • 3. Gut haftbar und schnell trocken
  • 4. Flexibel
  • 5. Hohe Schaltzahl (min. 20000 Schaftvorgänge)
  • 6. Geringer Abrieb der Schalt.- und Kontaktfläche
IV. Versuche
Versuchsbeginn mit verschiedenen Trägermaterialien wie z. B. Kleber-Metallpulver- Gemische.
V. Lösung
Eine Mischung aus einer Speziallösung, Kohlenstoff und seinen Modifikationen. Genaues Mischungsverhältnis der einzelnen Komponenten:
Die Zusammensetzung des flüssigen Leitgummi sind jeweils gleiche Volumenanteile von:
  • - Gummilösung (Vulkanisationsmittel)
  • - Benzin
  • - Kohlenstoff und seinen Modifikationen (Graphit)
VI. Dauertest
Bau einer elektronisch gesteuerten Schaltmechanik mit Impulszähler, zur Überprüfung der vorgegebenen Schaltzahl und Abriebsstabilität.
VII. Ergebnis
Das Ergebnis ist eine Flüssigkeit, die alle Anforderungen erfüllt, zusätzlich sehr schnell verarbeitbar und trocken ist und im Dauertest eine mindestens dreimal so hohe Schaltanzahl hat (bei 60000 abgebrochen).
Mit dieser Flüssigkeit ist also eine dauerhafte Reparatur von Schaltmatten aller Art schnell und preiswert möglich.

Claims (2)

1. Verwendung von sich mit der Kontaktfläche von Schaltmatten haftend verbin­ dendem flüssigem Leitgummi aus jeweils gleichen Volumenanteilen von Gummi­ lösung (Vulkanisationsmittel), Benzin sowie Kohlenstoff und seinen Modifikationen (Graphit) zur dauerhaften Reparatur von Schaltmatten mit nachlassender Leitfähig­ keit der Schaltkontakte.
2. Verwendung von flüssigem Leitgummi nach Anspruch 1, wobei die Schaltmatten Tastenmatten von Fernbedienungen, Codesendern oder Handytastaturen sind.
DE1997122713 1997-05-30 1997-05-30 Flüssiges Leitgummi Expired - Fee Related DE19722713C1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997122713 DE19722713C1 (de) 1997-05-30 1997-05-30 Flüssiges Leitgummi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997122713 DE19722713C1 (de) 1997-05-30 1997-05-30 Flüssiges Leitgummi

Publications (1)

Publication Number Publication Date
DE19722713C1 true DE19722713C1 (de) 1998-10-29

Family

ID=7830956

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997122713 Expired - Fee Related DE19722713C1 (de) 1997-05-30 1997-05-30 Flüssiges Leitgummi

Country Status (1)

Country Link
DE (1) DE19722713C1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715235A (en) * 1985-03-04 1987-12-29 Asahi Kasei Kogyo Kabushiki Kaisha Deformation sensitive electroconductive knitted or woven fabric and deformation sensitive electroconductive device comprising the same
WO1991011493A2 (en) * 1990-01-31 1991-08-08 Adhesives Research, Inc. Electrically conductive pressure sensitive adhesive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715235A (en) * 1985-03-04 1987-12-29 Asahi Kasei Kogyo Kabushiki Kaisha Deformation sensitive electroconductive knitted or woven fabric and deformation sensitive electroconductive device comprising the same
WO1991011493A2 (en) * 1990-01-31 1991-08-08 Adhesives Research, Inc. Electrically conductive pressure sensitive adhesive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Derwent-Abstract 89-189563/26 *

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee