Polyamide-imide copper wire that has excellent heat resistance, wear resistance and inverter surge resistance In recent years, higher reliability of coils used in electronic and electrical equipment has been demanded in order to cope with trends toward increased performance and reliability of such equipment. An organic (polymer)/inorganic nano composite material consists of a polymer in which fine inorganic particles of the order of nm are uniformly distributed. The application of nano composite technology to enamel wire (Si-nano series) promises to markedly improve the characteristics of the wire. Type Si-nano AIW AISNW Features Excellent heat resistance (softening temperature = 500or higher) Excellent wear resistance Excellent service life (V-t) characteristics Flexibility, adhesion, and terminating ability (fusing treatment, etc.) are the same as those of conventional AIW. Sliding performance can also be realized by means of surface treatment (by coating with special sliding type AI or a lubricant). Excellent heat resistance (softening temperature = 500 or higher) Excellent wear resistance Flexibility, adhesion, and terminating ability (fusing treatment, etc.) are the same as those of conventional AIW. Can be combined with various kinds of fusion films. Structure Applications Inverter drive motor High voltage motor High efficiency motor Coils for automobile parts Others Speaker coils High heat resistant coils Others Silica dispersed condition (1.00.6) * The white particles are silica, and the brown part is AI. These fine particles have a mean diameter of approx. 50 nm, and are uniformly distributed throughout the AI resin. Photographs of the surface enamel wire for difference degrees of dispersion are shown below. If the particle distribution is uneven, the surface will be rough because of the existence of silica agglomerate. Surface photograph (uniform distribution) Surface photograph (non-uniform distribution) Si-nano AIW Heat degradation characteristics V-t characteristics AISNW Heat degradation characteristics Characteristics example Item Si-nano AIW 0.3mm AISNW 0.5mm AIW 0.5mm PIW 0.5mm Remarks Insulation breakdown voltage (kV) Normal state 6.84 4.41 6.87 8.94 Twisted pair method 20% elongation 5.01 3.42 5.40 8.43 - Heat degradation 5.95 3.57 4.73 7.17 240 -168hr Softening temperature 500 500 400 500 Temperature rise method Temperature index (240) (240) 220 240 Parenthesized values are estimated values. Scrape [N] 8.6 11.1 5.6 6.6 - Adhesion Good Good Good Good - Flexibility 1d good 1d good 1d good 1d good - Dynamic coefficient of friction 0.07 - 0.07 0.07 *Surface-treated product Insulation breakdown time (min) 442 - 2 7 100KHz-1.2kVp *The characteristics test is based on JIS C3003.