{"id":2525,"date":"2026-07-19T17:25:55","date_gmt":"2026-07-19T17:25:55","guid":{"rendered":"https:\/\/www.fhysilicone.com\/?p=2525"},"modified":"2026-07-19T23:45:05","modified_gmt":"2026-07-19T23:45:05","slug":"conductive-liquid-silicone-rubber-properties-applications-and-custom-molding-considerations","status":"publish","type":"post","link":"https:\/\/www.fhysilicone.com\/de\/conductive-liquid-silicone-rubber-properties-applications-and-custom-molding-considerations\/","title":{"rendered":"Leitf\u00e4higer Fl\u00fcssigsilikonkautschuk: Eigenschaften, Anwendungsbereiche und \u00dcberlegungen zur kundenspezifischen Formgebung"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Fl\u00fcssigsilikonkautschuk wird in der Regel f\u00fcr elektrische Isolierungen, flexible Dichtungen und den Einsatz unter extremen Temperaturen verwendet. Durch die Einarbeitung elektrisch leitf\u00e4higer F\u00fcllstoffe in die Silikonformulierung k\u00f6nnen Hersteller leitf\u00e4hige LSR-Bauteile herstellen, die die Flexibilit\u00e4t eines Elastomers mit einem kontrollierten elektrischen Widerstand verbinden.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Leitf\u00e4higer Fl\u00fcssigsilikonkautschuk kann f\u00fcr die elektromagnetische Abschirmung, den antistatischen Schutz, elektrische Kontakte, Widerstandsheizungen, die Hochspannungsfeldsteuerung sowie weitere elektrische oder elektronische Anwendungen eingesetzt werden. Shin-Etsu f\u00fchrt leitf\u00e4hige Fl\u00fcssigsilikonmaterialien f\u00fcr die elektromagnetische Abschirmung, antistatische Dichtungen und Klebstoffe an, w\u00e4hrend Momentive und Dow leitf\u00e4hige LSR-Typen f\u00fcr Kabelzubeh\u00f6r und Komponenten zur Kontrolle elektrischer Spannungen anbieten. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Die Auswahl von leitf\u00e4higem LSR sollte jedoch nicht allein anhand des Aussehens oder der H\u00e4rte erfolgen. Sein elektrisches Verhalten h\u00e4ngt vom F\u00fcllstoffsystem, der F\u00fcllstoffkonzentration, der Formgeometrie, dem Anpressdruck, den Verarbeitungsbedingungen und der Einsatzumgebung ab.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations-1024x683.png\" alt=\"\" class=\"wp-image-2526\" srcset=\"https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations-1024x683.png 1024w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations-300x200.png 300w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations-768x512.png 768w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations-18x12.png 18w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations-600x400.png 600w, https:\/\/www.fhysilicone.com\/wp-content\/uploads\/2026\/07\/Conductive-Liquid-Silicone-Rubber-Properties-Applications-and-Custom-Molding-Considerations.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Eine erfolgreiche kundenspezifische Komponente muss daher ein Gleichgewicht zwischen der Leitf\u00e4higkeit und folgenden Faktoren herstellen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flexibilit\u00e4t<\/li>\n\n\n\n<li>Rei\u00dffestigkeit<\/li>\n\n\n\n<li>Kompressionsleistung<\/li>\n\n\n\n<li>Ma\u00dfgenauigkeit<\/li>\n\n\n\n<li>Formbarkeit<\/li>\n\n\n\n<li>Temperaturbest\u00e4ndigkeit<\/li>\n\n\n\n<li>Umweltvertr\u00e4glichkeit<\/li>\n\n\n\n<li>Haftung auf anderen Materialien<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In diesem Artikel werden die wichtigsten Eigenschaften, Anwendungsbereiche und fertigungstechnischen Aspekte des kundenspezifischen Formens von leitf\u00e4higem LSR erl\u00e4utert.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Was ist leitf\u00e4higer Fl\u00fcssigsilikonkautschuk?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Fl\u00fcssigsilikonkautschuk, \u00fcblicherweise mit LSR abgek\u00fcrzt, ist im Allgemeinen ein zweikomponentiges, platinvernetztes Elastomer, das f\u00fcr das Fl\u00fcssigspritzgie\u00dfen entwickelt wurde. Es erm\u00f6glicht eine schnelle Aush\u00e4rtung, eine automatisierte Fertigung und das pr\u00e4zise Formen d\u00fcnner oder komplexer Bauteile. (<a href=\"https:\/\/www.momentive.com\/en-us\/product-categories\/formulated-products\/elastomers\/liquid-silicone-rubber-lsr\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Herk\u00f6mmlicher Silikonkautschuk ist in der Regel ein elektrischer Isolator. Leitf\u00e4higes LSR wird mit Kohlenstoff oder anderen elektrisch leitf\u00e4higen Materialien modifiziert, die leitf\u00e4hige Bahnen durch das ausgeh\u00e4rtete Elastomer bilden. Shin-Etsu beschreibt leitf\u00e4hige Silikonprodukte als Silikonmischungen, die Kohlenstoff und andere leitf\u00e4hige Materialien enthalten und dabei die charakteristische Flexibilit\u00e4t und Umweltbest\u00e4ndigkeit von Silikonkautschuk beibehalten. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Die endg\u00fcltige Verbindung kann f\u00fcr folgende Zwecke konzipiert sein:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Geringer elektrischer Widerstand<\/li>\n\n\n\n<li>Ableitung statischer Elektrizit\u00e4t<\/li>\n\n\n\n<li>Abschirmung gegen elektromagnetische St\u00f6rungen<\/li>\n\n\n\n<li>Gesteuerte ohmsche Erw\u00e4rmung<\/li>\n\n\n\n<li>Steuerung des elektrischen Feldes<\/li>\n\n\n\n<li>Druckabh\u00e4ngige Kontaktschaltung<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Der Begriff <strong>leitf\u00e4higes Silikon<\/strong> ist daher zu allgemein gefasst, um als vollst\u00e4ndige Materialspezifikation zu dienen. Ein Produkt, das zur Ableitung statischer Elektrizit\u00e4t bestimmt ist, erfordert m\u00f6glicherweise einen ganz anderen spezifischen Widerstand als eine Dichtung, die Strom leiten oder empfindliche Elektronik abschirmen soll.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wie leitf\u00e4hige F\u00fcllstoffe elektrische Leitf\u00e4higkeit erzeugen<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Das Silikonpolymer selbst bleibt elektrisch isolierend. Die Leitf\u00e4higkeit wird durch die Einarbeitung leitf\u00e4higer Partikel in die gesamte Formulierung erreicht.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mit steigender F\u00fcllstoffkonzentration kommen die Partikel miteinander in Kontakt und bilden durchgehende elektrische Leitungswege. Unterhalb dieser Leitf\u00e4higkeitsschwelle kann der Widerstand extrem hoch bleiben. Im Bereich nahe der Schwelle kann bereits eine relativ geringe \u00c4nderung der F\u00fcllstoffkonzentration oder der Dispersion zu einer starken \u00c4nderung des spezifischen Widerstands f\u00fchren.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu berichtet, dass handels\u00fcbliche leitf\u00e4hige Silikonkautschuke in der Regel einen spezifischen Volumenwiderstand zwischen etwa 0,01 und 10 \u03a9\u00b7m aufweisen. Das Unternehmen weist zudem darauf hin, dass es schwierig sein kann, einen konstanten Widerstand in bestimmten Zwischenbereichen aufrechtzuerhalten, da bereits geringe \u00c4nderungen des Kohlenstoffgehalts zu erheblichen Widerstands\u00e4nderungen f\u00fchren k\u00f6nnen. (<a href=\"https:\/\/www.shinetsusilicone-global.com\/catalog\/pdf\/rubber_e.pdf\" rel=\"nofollow noopener\" target=\"_blank\">Shin-Etsu Silikon<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dies hat mehrere praktische Konsequenzen:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ein Kunde sollte einen akzeptablen Widerstandsbereich angeben, anstatt lediglich \u201cleitf\u00e4higes Silikon\u201d zu verlangen.\u201d<\/li>\n\n\n\n<li>Der Hersteller muss f\u00fcr eine gleichm\u00e4\u00dfige Verteilung und Durchmischung des F\u00fcllstoffs sorgen.<\/li>\n\n\n\n<li>Die Pr\u00fcfk\u00f6rper sollten die endg\u00fcltige Formdicke und die Verarbeitungsbedingungen widerspiegeln.<\/li>\n\n\n\n<li>Die Leitf\u00e4higkeit sollte \u00fcber mehrere Produktionschargen hinweg bewertet werden.<\/li>\n\n\n\n<li>Die elektrischen Eigenschaften des fertigen Bauteils sollten gepr\u00fcft werden und nicht allein aus den Rohstoffdaten abgeleitet werden.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Leitf\u00e4higes LSR ist nicht dasselbe wie w\u00e4rmeleitf\u00e4higes LSR<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Elektrische Leitf\u00e4higkeit und W\u00e4rmeleitf\u00e4higkeit sind unterschiedliche Materialeigenschaften.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Elektrisch leitf\u00e4higes LSR ist so formuliert, dass es elektrischen Strom leitet, statische Aufladung reguliert oder mit einem elektrischen Feld interagiert.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W\u00e4rmeleitendes LSR ist in erster Linie darauf ausgelegt, W\u00e4rme von elektronischen Bauteilen abzuleiten. Je nach F\u00fcllstoffsystem kann es dennoch elektrisch isolierend sein.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Momentive unterscheidet zwischen elektrisch leitf\u00e4higen Formulierungen und w\u00e4rmeleitf\u00e4higen, spritzgie\u00dfbaren LSR-Produkten und zeigt damit, dass f\u00fcr die beiden Funktionen unterschiedliche Kriterien bei der Materialauswahl gelten. (<a href=\"https:\/\/www.momentive.com\/en-us\/product-categories\/formulated-products\/elastomers?utm_source=chatgpt.com\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In einer Projektspezifikation sollte eindeutig angegeben werden, ob die Komponente Folgendes erfordert:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Elektrische Leitf\u00e4higkeit<\/li>\n\n\n\n<li>W\u00e4rmeleitf\u00e4higkeit<\/li>\n\n\n\n<li>Beide Immobilien<\/li>\n\n\n\n<li>W\u00e4rmeleitf\u00e4higkeit bei elektrischer Isolierung<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Werden diese Anforderungen verwechselt, kann dies zu Materialversagen oder elektrischen Sicherheitsrisiken f\u00fchren.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zu spezifizierende wesentliche elektrische Eigenschaften<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Volumenwiderstand<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Der spezifische Volumenwiderstand gibt den elektrischen Widerstand durch den gesamten K\u00f6rper eines Materials an und wird \u00fcblicherweise in \u03a9\u00b7m oder \u03a9\u00b7cm angegeben.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ein niedrigerer spezifischer Volumenwiderstand deutet im Allgemeinen auf eine h\u00f6here elektrische Leitf\u00e4higkeit hin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Der spezifische Volumenwiderstand ist wichtig f\u00fcr:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leitf\u00e4hige Dichtungen<\/li>\n\n\n\n<li>Hochspannungs-Feldsteuerungskomponenten<\/li>\n\n\n\n<li>Stromf\u00fchrende Elastomer-Bauteile<\/li>\n\n\n\n<li>Widerstandsheizelemente<\/li>\n\n\n\n<li>Leitf\u00e4hige Kontaktkomponenten<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Dow beschreibt sein leitf\u00e4higes LSR f\u00fcr Spritzgussanwendungen zur elektrischen Spannungssteuerung als Material mit niedrigem spezifischen Volumenwiderstand. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Der Kunde sollte Folgendes festlegen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zielwert<\/li>\n\n\n\n<li>Zul\u00e4ssiger Mindestwert<\/li>\n\n\n\n<li>Maximum acceptable value<\/li>\n\n\n\n<li>Test specimen thickness<\/li>\n\n\n\n<li>Pr\u00fcftemperatur<\/li>\n\n\n\n<li>Conditioning requirements<\/li>\n\n\n\n<li>Whether measurements are required before and after aging<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Surface Resistance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Surface resistance measures how easily current travels across the surface of a component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can be particularly relevant for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Static-dissipative surfaces<\/li>\n\n\n\n<li>Equipment-touch interfaces<\/li>\n\n\n\n<li>Electronic housings<\/li>\n\n\n\n<li>Dust-sensitive environments<\/li>\n\n\n\n<li>Flexible antistatic components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Surface resistance may be affected by contamination, moisture, oils and surface finish. Testing should therefore be performed under conditions representative of actual use.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Contact Resistance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Contact resistance describes the electrical resistance where the silicone touches another conductive material.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The result can depend on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Anpressdruck<\/li>\n\n\n\n<li>Kontaktbereich<\/li>\n\n\n\n<li>Oberfl\u00e4chenrauheit<\/li>\n\n\n\n<li>Electrode material<\/li>\n\n\n\n<li>Oxidation<\/li>\n\n\n\n<li>Silikonh\u00e4rte<\/li>\n\n\n\n<li>Component thickness<\/li>\n\n\n\n<li>Verunreinigung<\/li>\n\n\n\n<li>Repeated compression<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A raw-material volume-resistivity value does not automatically predict the contact resistance of a finished keypad, switch or conductive gasket.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Resistance Under Compression<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Some conductive silicone components are compressed during assembly. Compression can move conductive particles closer together and increase the effective contact area.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The development team should measure resistance at:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Minimum assembly compression<\/li>\n\n\n\n<li>Nominal compression<\/li>\n\n\n\n<li>Maximum compression<\/li>\n\n\n\n<li>Repeated compression cycles<\/li>\n\n\n\n<li>Erh\u00f6hte Temperatur<\/li>\n\n\n\n<li>End-of-life conditions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is especially important for conductive gaskets, contact pads and pressure-sensitive switching components.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">EMI Shielding Performance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For electromagnetic interference applications, low resistivity alone may not establish adequate shielding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Shielding performance can also depend on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Filler type<\/li>\n\n\n\n<li>Component thickness<\/li>\n\n\n\n<li>Gasket continuity<\/li>\n\n\n\n<li>Anpressdruck<\/li>\n\n\n\n<li>Enclosure material<\/li>\n\n\n\n<li>Joint design<\/li>\n\n\n\n<li>Frequency range<\/li>\n\n\n\n<li>Vorbereitung der Oberfl\u00e4che<\/li>\n\n\n\n<li>Gaps and fasteners<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu identifies electromagnetic shielding as an application for conductive liquid silicone seals and conductive rubber components. (<a href=\"https:\/\/www.shinetsusilicone-global.com\/products\/function\/conduct.shtml\" rel=\"nofollow noopener\" target=\"_blank\">Shin-Etsu Silikon<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The complete enclosure or assembly should therefore be tested where shielding performance is critical.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mechanical Properties Still Matter<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Adding conductive fillers changes the formulation and may affect the mechanical behavior of the silicone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zu den wichtigen Eigenschaften z\u00e4hlen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Shore-A-H\u00e4rte<\/li>\n\n\n\n<li>Zugfestigkeit<\/li>\n\n\n\n<li>Dehnung<\/li>\n\n\n\n<li>Rei\u00dffestigkeit<\/li>\n\n\n\n<li>Druckverformungsrest<\/li>\n\n\n\n<li>Flex-fatigue resistance<\/li>\n\n\n\n<li>Resilience<\/li>\n\n\n\n<li>Abriebfestigkeit<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For example, Dow\u2019s conductive stress-control LSR is described as a 30\u201335 Shore A material with high elongation and specified tensile strength, showing that electrical performance must coexist with mechanical requirements. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A highly conductive formulation may not automatically provide the best:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rei\u00dffestigkeit<\/li>\n\n\n\n<li>Dynamic flexibility<\/li>\n\n\n\n<li>Dichtungsleistung<\/li>\n\n\n\n<li>Demolding strength<\/li>\n\n\n\n<li>Thin-wall durability<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The selected material must satisfy both electrical and physical requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Temperature and Environmental Performance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Silicone elastomers are commonly selected for their ability to remain flexible across changing temperatures. Conductive formulations can also provide the heat, cold and weather resistance associated with silicone rubber, although exact limits depend on the material grade. Shin-Etsu describes conductive silicone products as providing conductivity together with heat resistance, cold resistance and weatherability. (<a href=\"https:\/\/www.shinetsusilicone-global.com\/products\/type\/cond_ec\/index.shtml\" rel=\"nofollow noopener\" target=\"_blank\">Shin-Etsu Silikon<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical properties should be evaluated after exposure to relevant conditions, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hochtemperaturalterung<\/li>\n\n\n\n<li>Low-temperature storage<\/li>\n\n\n\n<li>Temperaturwechselbeanspruchung<\/li>\n\n\n\n<li>Luftfeuchtigkeit<\/li>\n\n\n\n<li>Wasser<\/li>\n\n\n\n<li>UV-Strahlung<\/li>\n\n\n\n<li>Ozon<\/li>\n\n\n\n<li>Oils or cleaning agents<\/li>\n\n\n\n<li>Mechanical fatigue<\/li>\n\n\n\n<li>Long-term compression<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Temperature can affect both polymer behavior and electrical resistance. The customer should not assume that room-temperature measurements will remain unchanged throughout the product\u2019s service life.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Major Applications of Conductive LSR<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">EMI and RFI Shielding Gaskets<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive LSR can be molded into flexible gaskets used between electronic housings, covers and access panels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Potential applications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kommunikationsger\u00e4te<\/li>\n\n\n\n<li>Industrial controllers<\/li>\n\n\n\n<li>Automotive electronic modules<\/li>\n\n\n\n<li>Battery-system housings<\/li>\n\n\n\n<li>Sensoren<\/li>\n\n\n\n<li>Unterhaltungselektronik<\/li>\n\n\n\n<li>Instrumentation enclosures<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The silicone provides flexibility and environmental sealing, while the conductive network helps maintain electrical continuity between mating surfaces.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For effective shielding, the design must prevent discontinuities at:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ecken<\/li>\n\n\n\n<li>Fastener locations<\/li>\n\n\n\n<li>Gasket joints<\/li>\n\n\n\n<li>Cable entries<\/li>\n\n\n\n<li>Housing transitions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Antistatic and Static-Dissipative Components<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive or partially conductive silicone may be used to control electrostatic charge.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Beispiele hierf\u00fcr sind:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Antistatic seals<\/li>\n\n\n\n<li>Equipment feet<\/li>\n\n\n\n<li>Handling pads<\/li>\n\n\n\n<li>Electronic assembly fixtures<\/li>\n\n\n\n<li>Schutzh\u00fcllen<\/li>\n\n\n\n<li>Flexible contact surfaces<\/li>\n\n\n\n<li>Dust-sensitive equipment components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu specifically identifies antistatic seals, adhesives and protection for electrical or electronic devices as applications for conductive silicone. (<a href=\"https:\/\/www.shinetsusilicone-global.com\/products\/function\/conduct.shtml\" rel=\"nofollow noopener\" target=\"_blank\">Shin-Etsu Silikon<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The target resistance must be carefully controlled. A component designed to dissipate charge does not necessarily need the low resistance required for carrying substantial current.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Conductive Keypads and Switch Contacts<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive silicone can be molded into contact pills or integrated switching structures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the silicone is pressed, the conductive area connects two circuit-board contacts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zu den wichtigen Auslegungsfaktoren z\u00e4hlen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kontaktwiderstand<\/li>\n\n\n\n<li>Actuation force<\/li>\n\n\n\n<li>Key travel<\/li>\n\n\n\n<li>Recovery force<\/li>\n\n\n\n<li>Contact geometry<\/li>\n\n\n\n<li>Oberfl\u00e4chenreinheit<\/li>\n\n\n\n<li>Lebensdauer<\/li>\n\n\n\n<li>Alignment with the circuit board<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu lists keyboard contact points as a common conductive silicone application. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Resistive Heating Components<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because conductive silicone has electrical resistance, current passing through it can generate heat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Possible applications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flexible heater elements<\/li>\n\n\n\n<li>Anti-condensation parts<\/li>\n\n\n\n<li>Temperature-maintenance components<\/li>\n\n\n\n<li>Heated pads<\/li>\n\n\n\n<li>Specialized industrial devices<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu identifies heater components as one use for conductive silicone rubber. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Heating applications require careful control of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Resistance uniformity<\/li>\n\n\n\n<li>Voltage<\/li>\n\n\n\n<li>Current<\/li>\n\n\n\n<li>Component thickness<\/li>\n\n\n\n<li>W\u00e4rmeverteilung<\/li>\n\n\n\n<li>Maximum surface temperature<\/li>\n\n\n\n<li>Electrical connections<\/li>\n\n\n\n<li>Thermische Alterung<\/li>\n\n\n\n<li>Over-temperature protection<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The heater should be evaluated as a complete electrical system rather than only as a molded rubber component.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">High-Voltage Cable Accessories<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive LSR is used in medium- and high-voltage cable systems for electrical field control.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Applications can include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cable joints<\/li>\n\n\n\n<li>Cable terminations<\/li>\n\n\n\n<li>Push-on accessories<\/li>\n\n\n\n<li>Cold-shrink components<\/li>\n\n\n\n<li>Stress-control layers<\/li>\n\n\n\n<li>Switchgear connectors<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Momentive states that conductive LSR can be combined with insulating silicone materials to provide electrical field control in push-on joints and cold-shrink cable accessories. (<a href=\"https:\/\/www.momentive.com\/en-us\/industry\/energy-oil-gas-infrastructure\/elastomers-infrastructure-energy-transmission-distribution\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dow also offers conductive LSR designed for electrical stress-control devices and conductive moldings. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These applications require strict control of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Resistivity<\/li>\n\n\n\n<li>Interface quality<\/li>\n\n\n\n<li>Layer adhesion<\/li>\n\n\n\n<li>Geometry<\/li>\n\n\n\n<li>Luftansammlung<\/li>\n\n\n\n<li>Verunreinigung<\/li>\n\n\n\n<li>Insulating-material compatibility<\/li>\n\n\n\n<li>Long-term electrical aging<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Conductive Seals and O-Rings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive silicone can combine sealing with electrical continuity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Potential applications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conductive enclosure gaskets<\/li>\n\n\n\n<li>Grounding seals<\/li>\n\n\n\n<li>Shielded connector seals<\/li>\n\n\n\n<li>Equipment access-panel seals<\/li>\n\n\n\n<li>Specialized O-rings<\/li>\n\n\n\n<li>Conductive packing components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu lists conductive gaskets, O-rings, seals and packing among typical molded applications. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The designer must balance low electrical resistance with compression set, sealing force and environmental durability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Flexible Sensors and Electrodes<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Specially developed conductive silicone may also be considered for flexible sensing or electrode structures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The design may use resistance changes caused by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compression<\/li>\n\n\n\n<li>Bending<\/li>\n\n\n\n<li>Stretching<\/li>\n\n\n\n<li>Contact with another surface<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These projects generally require application-specific material characterization because the resistance-strain relationship may be nonlinear and sensitive to geometry, loading history and environmental conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conductive Filler Selection<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive silicone formulations may use carbon or other electrically conductive materials. The filler system influences:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Electrical resistance<\/li>\n\n\n\n<li>Farbe<\/li>\n\n\n\n<li>Viskosit\u00e4t<\/li>\n\n\n\n<li>H\u00e4rte<\/li>\n\n\n\n<li>Rei\u00dffestigkeit<\/li>\n\n\n\n<li>Cost<\/li>\n\n\n\n<li>Environmental resistance<\/li>\n\n\n\n<li>Shielding performance<\/li>\n\n\n\n<li>Processing behavior<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Carbon-filled conductive silicone is commonly black. Shin-Etsu\u2019s conductive rubber examples are black products with different volume-resistivity levels. (<a href=\"https:\/\/www.shinetsusilicone-global.com\/products\/type\/cond_ec\/index.shtml\" rel=\"nofollow noopener\" target=\"_blank\">Shin-Etsu Silikon<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Where a customer requests a light or custom color, the manufacturer must first confirm whether the required conductivity can be achieved with a suitable non-carbon filler system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A specific filler should not be chosen only because it provides low resistance. The complete formulation must also meet requirements concerning:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Korrosion<\/li>\n\n\n\n<li>Galvanic compatibility<\/li>\n\n\n\n<li>Particle migration<\/li>\n\n\n\n<li>Mechanische Leistung<\/li>\n\n\n\n<li>Regulatory restrictions<\/li>\n\n\n\n<li>Langfristige Stabilit\u00e4t<\/li>\n\n\n\n<li>Cost<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Custom LSR Molding Considerations<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Material Metering and Mixing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LSR is typically supplied as a two-part system. Accurate metering and homogeneous mixing are essential for reliable curing and consistent properties. Momentive describes LSR as a two-component, platinum-cured material designed for liquid injection molding. (<a href=\"https:\/\/www.momentive.com\/en-us\/product-categories\/formulated-products\/elastomers\/liquid-silicone-rubber-lsr\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For conductive grades, poor material control may also create differences in electrical resistance between parts or production batches.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The molding process should control:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Part A and Part B ratio<\/li>\n\n\n\n<li>Pumping pressure<\/li>\n\n\n\n<li>Mischqualit\u00e4t<\/li>\n\n\n\n<li>Materialtemperatur<\/li>\n\n\n\n<li>Verweildauer<\/li>\n\n\n\n<li>Verunreinigung<\/li>\n\n\n\n<li>R\u00fcckverfolgbarkeit von Chargen<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Material Viscosity and Cavity Filling<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive fillers can change how the LSR flows through the mold.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The mold designer should evaluate:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gate size<\/li>\n\n\n\n<li>Standort des Tors<\/li>\n\n\n\n<li>Flow length<\/li>\n\n\n\n<li>Thin-wall sections<\/li>\n\n\n\n<li>Pressure loss<\/li>\n\n\n\n<li>Schwei\u00dfn\u00e4hte<\/li>\n\n\n\n<li>Luftblasen<\/li>\n\n\n\n<li>Entl\u00fcftung<\/li>\n\n\n\n<li>Fill balance<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A mold designed for an unfilled general-purpose LSR may not perform identically with a highly filled conductive formulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Representative mold-flow trials should be completed using the actual production material.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Conductivity Uniformity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The conductive filler must remain properly dispersed throughout the molded component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zu den m\u00f6glichen Problemen geh\u00f6ren:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Local resistance variation<\/li>\n\n\n\n<li>Incomplete conductive paths<\/li>\n\n\n\n<li>High-resistance weld lines<\/li>\n\n\n\n<li>Differences between thin and thick sections<\/li>\n\n\n\n<li>Batch-to-batch inconsistency<\/li>\n\n\n\n<li>Conductivity variation near gates<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical measurements should be taken at multiple positions where uniformity is critical.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gate and Weld-Line Position<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When two flow fronts meet, they form a weld or knit line. Although the silicone may appear fully joined, the filler network at the interface may differ from the rest of the component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Critical conductive paths should not rely on an unvalidated weld line.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The gate should be positioned to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Promote balanced filling<\/li>\n\n\n\n<li>Minimize air entrapment<\/li>\n\n\n\n<li>Avoid critical contact areas<\/li>\n\n\n\n<li>Reduce long flow distances<\/li>\n\n\n\n<li>Control filler orientation<\/li>\n\n\n\n<li>Prevent visible gate damage<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Entl\u00fcftung<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trapped air can create:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unvollst\u00e4ndige Bef\u00fcllung<\/li>\n\n\n\n<li>Oberfl\u00e4chenfehler<\/li>\n\n\n\n<li>Brandspuren<\/li>\n\n\n\n<li>Weak areas<\/li>\n\n\n\n<li>Electrical discontinuities<\/li>\n\n\n\n<li>Poor overmolding interfaces<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">LSR molds require precise venting because the material can flow into extremely narrow gaps. Vents must release air without generating unacceptable flash.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Blitzsteuerung<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive flash may cause more than a cosmetic defect.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can create:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unintended electrical paths<\/li>\n\n\n\n<li>Short-circuit risks<\/li>\n\n\n\n<li>Interference with connector assembly<\/li>\n\n\n\n<li>Irregular gasket contact<\/li>\n\n\n\n<li>Contamination inside electronic housings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Critical areas should have clearly defined flash limits on the drawing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Entformen<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">High filler loading may affect flexibility and tear resistance. Thin conductive ribs, contact structures and sealing lips can be damaged during ejection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The component should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Suitable draft and release geometry<\/li>\n\n\n\n<li>Abgerundete \u00dcberg\u00e4nge<\/li>\n\n\n\n<li>Adequate wall thickness<\/li>\n\n\n\n<li>Supported sealing features<\/li>\n\n\n\n<li>A controlled demolding direction<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Reverse tapers and deep undercuts should be reviewed before tooling.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conductive and Insulating Two-Component Molding<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Some applications require conductive and electrically insulating silicone in the same component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-voltage cable accessories are one example. A conductive layer may control the electrical field while an insulating silicone layer provides dielectric protection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Momentive describes conductive Silopren LSR grades designed for combination with insulating LSR in cable joints and terminations. (<a href=\"https:\/\/www.momentive.com\/en-us\/industry\/energy-oil-gas-infrastructure\/elastomers-infrastructure-energy-transmission-distribution\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two-material LSR molding requires control of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bond strength between layers<\/li>\n\n\n\n<li>Interface cleanliness<\/li>\n\n\n\n<li>First-shot curing<\/li>\n\n\n\n<li>Second-shot adhesion<\/li>\n\n\n\n<li>Layer thickness<\/li>\n\n\n\n<li>Conductive-layer position<\/li>\n\n\n\n<li>Material shrinkage<\/li>\n\n\n\n<li>W\u00e4rmeausdehnung<\/li>\n\n\n\n<li>Mold alignment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The conductive layer must not extend into areas that require electrical insulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prototype cross-sections and electrical tests should be used to verify the complete interface.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Overmolding Conductive LSR onto Plastic or Metal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive LSR may be overmolded onto:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Metal terminals<\/li>\n\n\n\n<li>Busbars<\/li>\n\n\n\n<li>Cable components<\/li>\n\n\n\n<li>Kunststoffgeh\u00e4use<\/li>\n\n\n\n<li>Connector bodies<\/li>\n\n\n\n<li>Sensor structures<\/li>\n\n\n\n<li>Electronic inserts<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Potential benefits include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Integrated sealing<\/li>\n\n\n\n<li>Fewer assembly steps<\/li>\n\n\n\n<li>Controlled positioning<\/li>\n\n\n\n<li>Compact construction<\/li>\n\n\n\n<li>Improved environmental protection<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">However, adhesion should never be assumed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The development team must evaluate:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Substrate material<\/li>\n\n\n\n<li>Oberfl\u00e4chenbehandlung<\/li>\n\n\n\n<li>Primer requirements<\/li>\n\n\n\n<li>Sauberkeit einf\u00fcgen<\/li>\n\n\n\n<li>Temperatur eingeben<\/li>\n\n\n\n<li>Mechanical interlocks<\/li>\n\n\n\n<li>Mold pressure<\/li>\n\n\n\n<li>W\u00e4rmeausdehnung<\/li>\n\n\n\n<li>Galvanic compatibility<\/li>\n\n\n\n<li>Electrical contact location<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Self-bonding LSR grades are formulated to adhere to particular thermoplastics or metals, not universally to every substrate. (<a href=\"https:\/\/www.momentive.com\/en-us\/product-categories\/formulated-products\/elastomers\/liquid-silicone-rubber-lsr\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The actual production-grade insert should be used during adhesion trials.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Designing Electrical Connections<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A conductive silicone component must connect reliably to another conductor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zu den m\u00f6glichen Methoden geh\u00f6ren:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compression against a metal surface<\/li>\n\n\n\n<li>Molded contact pads<\/li>\n\n\n\n<li>Embedded metal inserts<\/li>\n\n\n\n<li>Clamped connections<\/li>\n\n\n\n<li>Conductive adhesive<\/li>\n\n\n\n<li>Mechanical fasteners<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The design should avoid relying on uncontrolled point contact.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zu den wichtigen Faktoren z\u00e4hlen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kontaktbereich<\/li>\n\n\n\n<li>Anpressdruck<\/li>\n\n\n\n<li>Metal finish<\/li>\n\n\n\n<li>Surface oxidation<\/li>\n\n\n\n<li>Silikondicke<\/li>\n\n\n\n<li>Montagetoleranz<\/li>\n\n\n\n<li>Vibration<\/li>\n\n\n\n<li>Temperaturwechselbeanspruchung<\/li>\n\n\n\n<li>Repeated disassembly<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A larger contact area does not always guarantee lower resistance when compression is uneven. The finished assembly should be measured under minimum and maximum tolerance conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Dimensional Design and Tolerances<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive LSR components often serve both electrical and mechanical functions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zu den kritischen Dimensionen k\u00f6nnen geh\u00f6ren:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Contact thickness<\/li>\n\n\n\n<li>Sealing-bead height<\/li>\n\n\n\n<li>Kompressionsabstand<\/li>\n\n\n\n<li>Electrode spacing<\/li>\n\n\n\n<li>Conductive-path width<\/li>\n\n\n\n<li>Insulating clearance<\/li>\n\n\n\n<li>Einf\u00fcgeposition<\/li>\n\n\n\n<li>Gasket perimeter<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The drawing should separate:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Electrical critical dimensions<\/li>\n\n\n\n<li>Sealing dimensions<\/li>\n\n\n\n<li>Assembly dimensions<\/li>\n\n\n\n<li>Cosmetic dimensions<\/li>\n\n\n\n<li>Reference dimensions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Applying unnecessarily tight tolerances to every feature can increase tooling and inspection costs without improving electrical performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Testing Conductive LSR Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A custom validation plan may include:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Electrical Testing<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spezifischer Volumenwiderstand<\/li>\n\n\n\n<li>Surface resistance<\/li>\n\n\n\n<li>Kontaktwiderstand<\/li>\n\n\n\n<li>Resistance under compression<\/li>\n\n\n\n<li>Resistance during stretching or bending<\/li>\n\n\n\n<li>Current-carrying capacity<\/li>\n\n\n\n<li>Shielding effectiveness<\/li>\n\n\n\n<li>Electrical field-control performance<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Mechanische Pr\u00fcfungen<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u00e4rte<\/li>\n\n\n\n<li>Zugfestigkeit<\/li>\n\n\n\n<li>Dehnung<\/li>\n\n\n\n<li>Rei\u00dffestigkeit<\/li>\n\n\n\n<li>Druckverformungsrest<\/li>\n\n\n\n<li>Repeated compression<\/li>\n\n\n\n<li>Flex fatigue<\/li>\n\n\n\n<li>Adhesion or peel strength<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Environmental Testing<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hochtemperaturalterung<\/li>\n\n\n\n<li>Einwirkung niedriger Temperaturen<\/li>\n\n\n\n<li>Temperaturwechselbeanspruchung<\/li>\n\n\n\n<li>Luftfeuchtigkeit<\/li>\n\n\n\n<li>Water exposure<\/li>\n\n\n\n<li>UV and ozone<\/li>\n\n\n\n<li>Fl\u00fcssigkeitswiderstand<\/li>\n\n\n\n<li>Vibration<\/li>\n\n\n\n<li>Salt or corrosive environments<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical measurements should be repeated after environmental and mechanical testing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A component that meets its initial resistance target may change after prolonged compression, heat aging or repeated movement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quality-Control Requirements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For production, conductivity should be managed as a controlled characteristic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A quality plan may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Incoming raw-material identification<\/li>\n\n\n\n<li>R\u00fcckverfolgbarkeit von Chargen<\/li>\n\n\n\n<li>Metering-ratio control<\/li>\n\n\n\n<li>First-piece resistance testing<\/li>\n\n\n\n<li>Ma\u00dfpr\u00fcfung<\/li>\n\n\n\n<li>Sichtpr\u00fcfung<\/li>\n\n\n\n<li>Defined electrode fixtures<\/li>\n\n\n\n<li>Controlled test pressure<\/li>\n\n\n\n<li>Periodic aging tests<\/li>\n\n\n\n<li>Statistical monitoring<\/li>\n\n\n\n<li>\u00c4nderungskontrolle<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The test method should define the fixture, electrode geometry and applied pressure. Otherwise, two laboratories may obtain different resistance values from the same component.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Conductive LSR Design Mistakes<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Requesting \u201cConductive Silicone\u201d Without a Resistance Range<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive, antistatic and shielding materials may have very different electrical properties.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Using Raw-Material Data as the Finished-Part Specification<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Molded thickness, geometry, pressure and processing can influence electrical performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ignoring Resistance Under Compression<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A gasket or contact pad may behave differently at minimum and maximum assembly compression.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Confusing Thermal and Electrical Conductivity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A thermally conductive silicone can remain electrically insulating.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Assuming Every Conductive Grade Is Suitable for EMI Shielding<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Shielding depends on the complete enclosure, gasket design and frequency range.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Allowing Conductive Flash in Insulating Areas<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Small flash can create an unintended electrical path.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Placing Weld Lines Across a Critical Conductive Path<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The conductivity of a weld-line region should be verified before it is used as part of the primary current path.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ignoring Filler Effects on Moldability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive grades may require different gate, vent and process settings from standard LSR.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Changing Material Grades Without Revalidation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Similar-looking grades can have different fillers, resistance, hardness and processing behavior.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Testing Only at Room Temperature<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical and mechanical properties should be checked after representative aging and environmental exposure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Information Needed for a Custom Conductive LSR Quotation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To receive an accurate quotation, customers should provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2D and 3D drawings<\/li>\n\n\n\n<li>Anwendungsbereich des Produkts<\/li>\n\n\n\n<li>Target volume resistivity<\/li>\n\n\n\n<li>Surface- or contact-resistance requirements<\/li>\n\n\n\n<li>Required shielding performance<\/li>\n\n\n\n<li>Operating voltage and current<\/li>\n\n\n\n<li>Temperaturbereich<\/li>\n\n\n\n<li>Umwelteinfl\u00fcsse<\/li>\n\n\n\n<li>Silikonh\u00e4rte<\/li>\n\n\n\n<li>Compression conditions<\/li>\n\n\n\n<li>Eins\u00e4tze aus Kunststoff oder Metall<\/li>\n\n\n\n<li>Required bonding method<\/li>\n\n\n\n<li>Expected annual quantity<\/li>\n\n\n\n<li>Pr\u00fcfvorschriften<\/li>\n\n\n\n<li>Applicable testing standards<\/li>\n\n\n\n<li>Verpackungsvorschriften<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For an existing component, a physical sample can also help the manufacturer evaluate:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Geometry<\/li>\n\n\n\n<li>Contact areas<\/li>\n\n\n\n<li>Trennlinien<\/li>\n\n\n\n<li>Materialh\u00e4rte<\/li>\n\n\n\n<li>Montageverfahren<\/li>\n\n\n\n<li>Potential molding process<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Practical Development Process<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Define the Electrical Function<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Determine whether the component is intended for static dissipation, current conduction, shielding, switching, heating or field control.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Establish the Resistance Target<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Define acceptable minimum and maximum values under specific test conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Define Mechanical Requirements<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm hardness, compression, sealing force, tear strength and expected movement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Select Candidate Materials<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Compare electrical, mechanical, environmental and processing properties.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 5: Review the Component Geometry<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluate conductive-path continuity, wall thickness, gates, weld lines and contact areas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Schritt 6: Repr\u00e4sentative Stichproben erstellen<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use the actual production-grade material and intended molding process.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 7: Test the Finished Component<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Measure electrical properties using representative fixtures and assembly pressure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 8: Complete Environmental Aging<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Repeat testing after heat, humidity, fluids, vibration or mechanical cycling.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 9: Conduct Pilot Production<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Evaluate batch-to-batch resistance and dimensional consistency.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 10: Freeze the Approved Configuration<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Control the material grade, supplier, molding process, tool, inserts and test method.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fazit<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Conductive liquid silicone rubber allows manufacturers to combine controlled electrical behavior with the flexibility, temperature performance and design freedom of silicone elastomers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can support applications such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>EMI shielding<\/li>\n\n\n\n<li>Antistatic protection<\/li>\n\n\n\n<li>Elektrische Kontakte<\/li>\n\n\n\n<li>Flexible heating<\/li>\n\n\n\n<li>Conductive sealing<\/li>\n\n\n\n<li>High-voltage field control<\/li>\n\n\n\n<li>Two-component conductive and insulating assemblies<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">However, conductive LSR is not a single standardized material.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Successful development requires clearly defined electrical targets, representative finished-part testing and careful control of filler dispersion, mold filling, flash, contact pressure and environmental aging.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The best material is not necessarily the grade with the lowest resistance. It is the grade that provides stable electrical performance while meeting the component\u2019s mechanical, sealing, processing and service-life requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Early cooperation between the product designer, material supplier, mold maker and LSR molding manufacturer can reduce tooling changes and help establish a reliable path from prototype testing to controlled mass production.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">H\u00e4ufig gestellte Fragen<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Is ordinary liquid silicone rubber electrically conductive?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. Standard LSR is generally electrically insulating. Conductive fillers must be incorporated into the formulation to create electrical conductivity.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What fillers are used in conductive silicone?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Carbon and other conductive materials can be added to silicone. The exact filler system depends on the required resistivity, mechanical properties, color and application.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is conductive silicone always black?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Carbon-filled conductive silicone is normally black. Other filler systems may allow different appearances, but color availability depends on the formulation and required conductivity.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the typical resistivity of conductive silicone rubber?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Shin-Etsu reports that many commercial conductive silicone rubbers fall within approximately 0.01\u201310 \u03a9\u00b7m, although specialized products may be designed outside this range. (<a href=\"https:\/\/www.shinetsusilicone-global.com\/catalog\/pdf\/rubber_e.pdf\" rel=\"nofollow noopener\" target=\"_blank\">Shin-Etsu Silikon<\/a>)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can conductive LSR be used for EMI shielding?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Conductive silicone seals and gaskets can be used in EMI-shielding systems. Shielding performance must be tested in the complete enclosure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can conductive LSR also provide environmental sealing?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. A properly designed conductive silicone gasket may provide both electrical continuity and protection against moisture or dust.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is electrically conductive LSR also thermally conductive?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not necessarily. Electrical and thermal conductivity are separate properties and must be specified independently.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can conductive LSR be overmolded onto metal?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, but the insert design, surface condition, adhesion method and electrical contact area must be validated.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can conductive and insulating silicone be molded together?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Conductive and insulating LSR layers can be integrated in selected two-component applications, including high-voltage cable accessories. (<a href=\"https:\/\/www.momentive.com\/en-us\/industry\/energy-oil-gas-infrastructure\/elastomers-infrastructure-energy-transmission-distribution\" rel=\"nofollow noopener\" target=\"_blank\">Momentive<\/a>)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the most important information for a quotation?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The manufacturer needs the drawing, intended electrical function, target resistance range, test conditions, operating environment, hardness, annual quantity and details of any plastic or metal inserts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Liquid silicone rubber is normally selected for electrical insulation, flexible sealing and resistance to demanding temperatures. By incorporating electrically conductive fillers into the silicone formulation, manufacturers can create conductive LSR components that combine elastomeric flexibility with controlled electrical resistance. Conductive liquid silicone rubber can be used for electromagnetic shielding, antistatic protection, electrical contacts, resistive heating, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2526,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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