COMPOSITES HAVING IMPROVED MICROWAVE SHIELDING PROPERTIES

Disclosed is a composite comprising from about 50 wt. % to about 97 wt. % of a thermoplastic resin, wherein the thermoplastic resin comprises a polyester; and from about 3 wt. % to about 15 wt. % of a carbon-based filler, wherein the carbon-based filler has a primary surface area of from about 500 t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NARANG, Kristi Jean, JIANG, Jiali, JUNG, Hochul, SAS, Martin, SILVI, Norberto
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS MEASURING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS PRINTED CIRCUITS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	Disclosed is a composite comprising from about 50 wt. % to about 97 wt. % of a thermoplastic resin, wherein the thermoplastic resin comprises a polyester; and from about 3 wt. % to about 15 wt. % of a carbon-based filler, wherein the carbon-based filler has a primary surface area of from about 500 to about 1000 m2/g, wherein the composite exhibits a dielectric constant ε' of between 5 and 30 and a dissipation loss ε" of between 0.5 and 45, measured at frequencies between about 10 and about 120 GHz. A molded sample of the composite exhibits a percent reflected power measured in transmission mode of at least 15% when observed according to a Free Space method at frequencies from about 75 GHz to 110 GHz.