DE3044285A1 - Rubber with pressure dependent electrical conductivity - contains metal particles and conducting fibres giving better long term performance - Google Patents
Rubber with pressure dependent electrical conductivity - contains metal particles and conducting fibres giving better long term performanceInfo
- Publication number
- DE3044285A1 DE3044285A1 DE19803044285 DE3044285A DE3044285A1 DE 3044285 A1 DE3044285 A1 DE 3044285A1 DE 19803044285 DE19803044285 DE 19803044285 DE 3044285 A DE3044285 A DE 3044285A DE 3044285 A1 DE3044285 A1 DE 3044285A1
- Authority
- DE
- Germany
- Prior art keywords
- electrical conductivity
- metal particles
- long term
- rubber
- contains metal
- 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.)
- Withdrawn
Links
- 239000002923 metal particle Substances 0.000 title claims abstract description 5
- 229920001971 elastomer Polymers 0.000 title claims description 7
- 230000007774 longterm Effects 0.000 title abstract 2
- 230000001419 dependent effect Effects 0.000 title description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 238000004132 cross linking Methods 0.000 claims abstract 2
- 239000000835 fiber Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 5
- 239000000806 elastomer Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/10—Adjustable resistors adjustable by mechanical pressure or force
- H01C10/12—Adjustable resistors adjustable by mechanical pressure or force by changing surface pressure between resistive masses or resistive and conductive masses, e.g. pile type
Abstract
Description
Gummielastisches Material mit druckab- Elastic material with pressure-resistant
hängiger elektrischer Leitfähigkeit Die Erfindung betrifft ein gummielastisches Material mit darin eingelagerten Metallpartikeln mit der besonderen Eigenschaft der druckabhängigen elektrischen Leitfähigkeit. pendent electrical conductivity The invention relates to a rubber-elastic Material with embedded metal particles with the special property the pressure-dependent electrical conductivity.
Natürliche oder synthetische Kautschuke verhalten sich dielektrisch, d. h. sie sind elektrisch nicht leitend. Werden jedoch in dieses Dielektrikum elektrisch leitfähige Partikel in genügendem Ausmaße eingelagert, so kommen bei Druckbelastung infolge der elastischen Verformung diese Partikel zur gegenseitigen Berührung, wodurch eine elektrische Leitfähigkeit erzeugt wird, die mit der Druckhöhe ansteigt.Natural or synthetic rubbers behave dielectrically, d. H. they are not electrically conductive. However, they become electrical in this dielectric Conductive particles are stored in sufficient quantities, so come under pressure due to the elastic deformation these particles come into mutual contact, whereby an electrical conductivity is generated, which increases with the pressure height.
Derart elektrisch leitend gemachte Elastomere haben ein weites Anwendungsgebiet als Druckschalter, Bremslichtschalter, Fahrzeugkupplungen oder als elektrisch leitfähige Abdichtungen. Von den Elastomeren hat sich besonders luftvernetzender Silikonkautschuk als geeignet erwiesen, in den bis zu 40% Metallpartikel eingelagert sind.Elastomers made electrically conductive in this way have a wide range of applications as pressure switches, brake light switches, vehicle clutches or as electrically conductive ones Waterproofing. Among the elastomers, silicone rubber that cross-links with air is particularly popular proved to be suitable, in which up to 40% metal particles are embedded.
Als nachteilig hat sich jedoch herausgestellt, daß aufgrund des rheologischen Verhaltens der Elastomere der Grad der elektrischen Leitfähigkeit bei gleichbleibendem Druck im Laufe der Zeit abnimmt. Dieser zeitabhängige Abfall der elektrischen Leitfähigkeit ist dort jedoch von erheblichem Nachteil, wo sie funkw -snsbedingt über einen rel.. langen Zeitraum erhalten bleiben muß, z. B. bei elektrisch leitfähigen Abdichtungen.However, it has been found to be disadvantageous that due to the rheological Behavior of the elastomers the degree of electrical conductivity with constant Pressure decreases over time. This time-dependent drop in electrical conductivity is There, however, a considerable disadvantage, where they have funkw -sns via a rel. must be maintained for a long period of time, e.g. B. with electrically conductive seals.
Es ist daher Aufgabe der vorliegenden Erfindung, druckabhängiges leitfähiges Material aus Elastomeren zu schaffen, das seine Leitfähigkeit auch über eine längere Zeitdauer ohne nennenswerten Abfall beibehält.It is therefore an object of the present invention to provide pressure-dependent conductive To create material made of elastomers, that its conductivity also over a longer period of time Maintains duration without significant drop.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß dem noch nicht ausgehärteten Elastomer außer den elektrisch leitfähigen Partikeln aus z. B. Aluminium noch ein bestimmter Anteil gleichmäßig verteilter elektrisch leitender Fasern, vorzugsweise Grafitfasern zugesetzt werden.According to the invention this object is achieved in that not yet cured elastomer except for the electrically conductive particles of z. B. aluminum a certain proportion of evenly distributed electrically conductive fibers, preferably Graphite fibers are added.
Umfangreiche Versuche und Zeitdauermessungen haben gezeigt, daß das erfindungsgemäße Material in seinem rheologischen Verhalten derart stabilisiert wurde, daß auch über eine längere Zeitdauer der Druckeinwirkung kein meßbarer Abfall der elektrischen Leitfähigkeit auftritt.Extensive tests and measurements over time have shown that the Material according to the invention stabilized in its rheological behavior in this way it became clear that no measurable drop was observed even over a longer period of time under the influence of pressure electrical conductivity occurs.
Als besonders "elektrisch zeitstandfest" hat sich ein Material aus luftvernetztem Silikonkautschuk erwiesen mit ca. 30 Vol.% Aluminiumpartikeln und ca. 10 Vol.One material has proven to be particularly "electrically resistant to creep" air-crosslinked silicone rubber has been shown to contain approx. 30% by volume of aluminum particles and approx. 10 vol.
Grafitfasern mit einer Faserlänge von 1-6 mm, vorzugsweise 3 mm und einem mittleren Durchmesser von 14 .Graphite fibers with a fiber length of 1-6 mm, preferably 3 mm and a mean diameter of 14.
Der Erfindungsgedanke umfaßt sinngemäß auch andere faserähnliche Gebilde, wie Späne, Metallwolle u.The idea of the invention also includes other fiber-like structures, such as chips, metal wool, etc.
Das Diagramm Fig. 1 zeigt in schematischer Darstellung den Verlauf der elektrischen Leitfähigkeit über der Zeitdauer bei konstantem Druck.The diagram in FIG. 1 shows the course in a schematic representation the electrical conductivity over time at constant pressure.
Die Kurve a entspricht dem Verhalten von erfindungsgemäßem elektrisch leitfähig gemachtem Material, während Kurve b den Verlauf der elektrischen Leitfähigkeit von bekanntem Material darstellt.The curve a corresponds to the behavior of electrical according to the invention made conductive material, while curve b shows the course of the electrical conductivity of known material.
L e e r s e i t eL e r s e i t e
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803044285 DE3044285A1 (en) | 1980-11-25 | 1980-11-25 | Rubber with pressure dependent electrical conductivity - contains metal particles and conducting fibres giving better long term performance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803044285 DE3044285A1 (en) | 1980-11-25 | 1980-11-25 | Rubber with pressure dependent electrical conductivity - contains metal particles and conducting fibres giving better long term performance |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3044285A1 true DE3044285A1 (en) | 1982-06-16 |
Family
ID=6117481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803044285 Withdrawn DE3044285A1 (en) | 1980-11-25 | 1980-11-25 | Rubber with pressure dependent electrical conductivity - contains metal particles and conducting fibres giving better long term performance |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3044285A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3386067A (en) * | 1967-04-24 | 1968-05-28 | Raphael J. Costanzo | Pressure-sensitive electrical switch and application therefor |
DE2652638A1 (en) * | 1976-11-19 | 1978-05-24 | Extraktionstechnik Gmbh | DEVICE FOR THE CONTINUOUS EXTRACTION OF PERCOLATION-CAPABLE PROCESSED GOODS BY USING LIQUID SOLVENTS |
-
1980
- 1980-11-25 DE DE19803044285 patent/DE3044285A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3386067A (en) * | 1967-04-24 | 1968-05-28 | Raphael J. Costanzo | Pressure-sensitive electrical switch and application therefor |
DE2652638A1 (en) * | 1976-11-19 | 1978-05-24 | Extraktionstechnik Gmbh | DEVICE FOR THE CONTINUOUS EXTRACTION OF PERCOLATION-CAPABLE PROCESSED GOODS BY USING LIQUID SOLVENTS |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0050231B1 (en) | Switching component with variable resistance | |
DE2907975C2 (en) | Method of manufacturing a synthetic resin insulator | |
DE2444847A1 (en) | PACKING FOR SEALING MOVING MACHINE PARTS | |
US4033800A (en) | Method of making an electric cable | |
DE3301635A1 (en) | MANUFACTURE OF CONDUCTIVE PLASTICS | |
DE2401038A1 (en) | BRAKE CONTROL DEVICE FOR TRAILER VEHICLES | |
DE3044285A1 (en) | Rubber with pressure dependent electrical conductivity - contains metal particles and conducting fibres giving better long term performance | |
DE2441517B2 (en) | ||
ATE355594T1 (en) | MOISTURE RESISTANT ELECTRICALLY CONDUCTIVE CEMENTS AND METHOD FOR THE PRODUCTION AND USE OF THE SAME | |
DE2302236A1 (en) | CABLE END CLOSURE | |
DE1515531B1 (en) | Long stabilizer | |
JPS57147573A (en) | Friction material composition | |
DE1669732A1 (en) | Electrically insulating materials and structures made from them | |
DE2131539C3 (en) | Sealant for sets of electrical cables | |
JPS57147572A (en) | Friction material composition | |
DE655589C (en) | Contact detector for converting light intensity fluctuations of a frequency in the audible range or above into electrical voltage fluctuations | |
DE2220278C3 (en) | Insulating material for an electrical system containing a very electronegative gas | |
DE942751C (en) | material | |
DE3150911C1 (en) | Filling substance for longitudinal sealing of electrical and / or optical cables and wires | |
DE6916274U (en) | WATERPROOF KINK PROTECTION | |
DE918334C (en) | Flexible non-metallic electrical conductor | |
SU120099A1 (en) | The method of obtaining antifriction textolite, for example, for bearings | |
DE437913C (en) | Positive pole electrode for electrical collectors | |
DE2602920A1 (en) | Electric, heat-storage plates - contg. heat conductor in ceramic compsn. admixed with hydraulic binder and silicone cpd. | |
DE7420596U (en) | Threaded coupling |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8130 | Withdrawal |