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US 6,638,448 B2Granted
Electrically conductive thermoplastic elastomer and product made thereof
AssigneePremix Inc.
InventorsMikko Karttunen, Jenni Mustonen
Life of this patent
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Abstract
An electrically conductive thermoplastic elastomer and a sealing and/or EMI shielding product comprising a substantially electrically non-conductive matrix material and an electrically conductive filler part which contains metal. The specific resistance of the elastomer is at most 1 Ω.cm.
Claims23
An electrically conductive thermoplastic elastomer comprising:
- an electrically non-conductive matrix material;
- a filler part, comprising metal-coated particles whose proportion is so high that the specific resistance of the electrically conductive thermoplastic elastomer is at most 1 Ω.cm;
- wherein the molecule-level structure and/or additives of the elastomer is such that the elastomer can be injection-moulded and/or extruded, and
- the molecule-level structure and/or additives of the matrix material is such that the viscosity of the matrix material is below the viscosity curve η=43625.7·γ0.52374−1, where θ=apparent viscosity and [Pas] γ=apparent shear rate [s−1].
1 more element
An electrically conductive thermoplastic elastomer comprising:
- an electrically non-conductive matrix material;
- a filler part, comprising metal-coated particles whose proportion is so high that the specific resistance of the electrically conductive thermoplastic elastomer is at most 0.1 Ω.cm;
- wherein the molecule-level structure and/or additives of the elastomer is such that the elastomer can be injection-moulded and/or extruded;
- and
- wherein the molecule-level structure and/or additives of the matrix material are such that the viscosity of the matrix material is below the viscosity curve η=43625.7·γ0.152374−1, where η=apparent viscosity and [Pas ] γ=apparent shear rate [s−1].
2 more elements
An electrically conductive thermoplastic elastomer comprising:
- a substantially electrically non-conductive matrix material, comprising styrene-ethylene-butylene-styrene copolymer;
- a filler part, comprising metal-coated particles whose proportion is so high that the specific resistance of the electrically conductive thermoplastic elastomer is at most 0.1 Ω.cm;
- wherein the molecule-level structure and/or additives of the elastomer is such that the elastomer can be injection-moulded and/or extruded, and the molecule-level structure and/or additives of the matrix material is such that the viscosity of the matrix material is below the viscosity curve η=43625.7·γ0.152374−1, where η=apparent viscosity [Pas] and γ=apparent shear rate [s−1].
An electrically conductive thermoplastic elastomer comprising:
- a substantially electrically non-conductive matrix material, comprising styrene-ethylene-propylene-styrene copolymer;
- a filler part, comprising metal-coated particles whose proportion is so high that the specific resistance of the electrically conductive thermoplastic elastomer is at most 0.1 Ω.cm;
- wherein the matrix material the molecule-level structure and/or additives of the elastomer is such that the elastomer can be injection-moulded and/or extruded, and
- the molecule-level structure and/or additives of the matrix material is such that the viscosity of the matrix material is below the viscosity curve η=43625.7·γ0.152374−1, where η=apparent viscosity [Pas] and γ=apparent shear rate [s−1].
1 more element
Dependencies are inferred from the claim text.