摘要:
A magnet wire containing a melt processable, thermoplastic resin blend insulative coating developed for use in high temperature electrical insulation systems. The invention relates to a high temperature electrical insulation containing a sulfone polymer blend for particular use with magnet wire. The sulfone polymer blend contains two poly(aryl ether sulfones), such as polyphenylsulfone and polysulfone.
摘要:
A process for rendering an electrically conducting polymer essentially non-conducting is provided, in which the polymer is brought into direct electrical contact with an electrolyte. Furthermore, an electric voltage is applied to said polymer using at least two electrodes connected to a voltage supply, each electrode independently being in electrical contact with one of said polymer and said electrolyte. Said electrically conducting polymer is rendered non-conducting through electrochemical reactions occurring in the interface between said polymer and said electrolyte in response to said electric voltage.
摘要:
Insulated electrical cables which are suitable for use in gasoline fuel tanks comprise a stranded conductor which is blocked by a polysulfide and is covered by polyamide insulation.
摘要:
Polymeric compositions having a high dielectric constant and low loss tangent are made from poly(phenylene sulfide), a ceramic having a high dielectric constant and a low loss tangent, and optionally an added reinforcing filler. The preferred ceramic is strontium titanate. The compositions have a dielectric constant of at least about 4. When mica, alumina, or magnesium titanate is used as an added reinforcing filler, the coefficient of thermal expansion diminishes significantly.
摘要:
The invention concerns a thermoplastic housing designed to hold electronic and/or micromechanical components and into which metal conductor tracks pass, the conductor tracks being injection moulded in one of the housing walls. The thermoplastic has a flexural strength of at least 200 MPa.
摘要:
An electrical wire comprises an elongate electrical conductor and electrical insulation comprising: (a) a layer of a cross-linked blend of an aromatic polymer and a polymer containing aliphatic moieties; and (b) a tracking control layer located on top of, and/or beneath layer (a). The aromatic/aliphatic polymer layer may, for example, comprise a polyaryletherimide or polysulphone blended with an aliphatic or aliphatic/aromatic polyamide e.g. nylon (12). The tracking control layer may be inorganic e.g. silica, or organic e.g. a fluoropolymer. The wire insulation combines good electrical and mechanical properties with high resistance to wet or dry tracking.