| 摘要 |
This invention relates to electrical articles having an electrical coil such as high-tension transformers, ignition coils and the like which are excellent in withstand voltage and endurance; and to a method for manufacturing the same. These electrical articles have an electrical coil in which a sheet material such as paper, cloth or non-woven fabric comprising cellulose as major constituent is used as at least a part of interlayer insulator. Said sheet material is characterized by being impregnated with one or more pretreating resins selected from the group consisting of phenolic resins, s-triazine ring compound resins, and phenol-s-triazine ring compound co-condensation resins and further impregnated with a thermosetting resin composition containing an epoxy resin, unsaturated polyester resin, 1,2-polybutadiene resin or silicone resin, said resin being hardened. The electrical articles of this invention are useful as high-tension transformers, ignition coils for internal combustion engines, ignition coils for gas- and petroleum-burners, electromagnetic valves, and solenoides, particularly as resin-molded coils encapsulated with resins and above all as resin-molded ignition coils for automobile engines. Thus, this invention provides electrical articles having an electrical coil excellent in withstand voltage, endurance, corona resistance and moisture resistance and also provides an advantageous method for manufacturing such articles.
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