Abstract:
The invention relates to a corona shield material (22) for producing a corona shield protective layer (16, 17) for an electric machine (1) in a particular rational manner. The corona shield material (22) contains an initially flowable matrix material (22) which can be cured in a curing reaction to form a solid. The corona shield material (22) further contains a photosensitive initiator (24) which can be transferred by electromagnetic radiation (25) into a reactive state triggering the curing reaction. The corona shield material (22) further contains at least one electrically conductive filler (25) which is present in particulate form.
Abstract:
The present disclosure relates to thermoplastic electrostatic dissipative (ESD) composites. The disclosed composites comprise a thermoplastic resin phase and a plurality of intermediate modulus carbon fibers dispersed within the thermoplastic resin phase. Also disclosed herein are methods for the manufacture and/or use of the disclosed ESD composites as well as articles formed from such composites.
Abstract:
Une pièce (1) comportant une partie structurale en matériau composite (2) électriquement isolant ou bien faiblement conducteur telle qu'une pièce à base de fibres de verre ou de fibres de carbone est protégée contre les accumulations de charges électriques et ou les impacts de foudre par une métallisation de la surface devant être protégée. La métallisation comporte un grillage (31) d'un matériau électriquement conducteur recouvert d'une couche de peinture électriquement conductrice (32). Une couche d'apprêt et de primaire (33) est également prévue entre le grillage et la peinture conductrice ainsi qu'une peinture de finition recouvrant la peinture conductrice (32). L'ensemble conduit à une protection performante vis à vis des impacts de foudre avec une masse réduite par rapport aux métallisations conventionnelles par grillage métallique.
Abstract:
A lightweight radio/CD player for vehicular application is virtually "fastenerless" and includes a case and frontal interface formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RFI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips. The PCB architecture is bifurcated into a first board carrying common circuit components in a surface mount configuration suitable for high volume production, and a second board carrying application specific circuit components in a wave soldered stick mount configuration. The major components and subassemblies are self-fixturing during the final assembly process, eliminating the need for dedicated tools, fixtures and assembly equipment. The major components and subassemblies self-interconnect by integral guide and connection features effecting "slide lock" and "snap lock" self-interconnection. The radio architecture includes improved push buttons employing 4-bar living hinge linkage and front loaded decorative trim buttons.
Abstract:
A lightweight radio/CD player for vehicular application is virtually "fastenerless" and includes a case (68) and frontal interface (70) formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen (212) that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RPI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips (218)
Abstract:
A lightweight radio/CD player for vehicular application is virtually "fastenerless" and includes a case and frontal interface formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RFI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips. The PCB architecture is bifurcated into a first board carrying common circuit components in a surface mount configuration suitable for high volume production, and a second board carrying application specific circuit components in a wave soldered stick mount configuration.
Abstract:
A lightweight radio/CD player for vehicular application is virtually "fastenerless" and includes a case and frontal interface formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RFI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips. The PCB architecture is bifurcated into a first board carrying common circuit components in a surface mount configuration suitable for high volume production, and a second board carrying application specific circuit components in a wave soldered stick mount configuration. The major components and subassemblies are self-fixturing during the final assembly process, eliminating the need for dedicated tools, fixtures and assembly equipment. The major components and subassemblies self-interconnect by integral guide and connection features effecting "slide lock" and "snap lock" self-interconnection. The radio architecture includes improved push buttons employing 4-bar living hinge linkage and front loaded decorative trim buttons.
Abstract:
A novel type of semiconducting polymer comprising an insulating thermoplastic polymer carrier and an intrinsically conducting polymer (ICP) is disclosed. In this semiconducting polymer essentially each of the ICP mesomers are covalently linked to the carrier, and the content of ICP is 0,5 to 25 % by weight, preferably 1 to 15 % by weight, more preferably 3 to 10 % by weight. The new semiconducting polymer is a material having good mechanical properties (e.g. mechanical properties comparable to well known thermplastics like polyethylen, poly(meth)acrylates, EVA, etc.) and it shows a loss of conductivity during processing which is lower than the conductivity loss of known semiconducting polymer materials. The semiconducting polymer is suitable for use as antistatic coating or EMI-shielding.
Abstract:
A permeable electrostatic shielding method and apparatus is disclosed that is suitable for use in shielding portable electronic devices such as calculators, smart cards and radios. Such electronic devices require protection from the electrostatic discharge occurring when a user accumulates an electrostatic charge and contacts a conducting surface of the electronic device. The resulting electrostatic discharge creates capacitively-coupled voltage transients in the digital circuits within the electronic device. The present invention prevents local charge accumulation on the surfaces of such electronic devices, which transmit and receive electromagnetic radio waves, without blocking the electromagnetic radiation essential to device function. One embodiment of this permeable electrostatic shield is formed by depositing a conductive layer of controlled thickness comprising a plurality of closely-spaced conductors that are electrically connected at one end to form a practical electrostatic shield permeable to RF electromagnetic radiation above 15 MHz.