Electrical properties of SUMIKAEXCEL PES

SUMIKAEXCEL PES is a heat-resistant electrical insulating material that maintains its excellent dielectric constant, dielectric tangent, and insulation resistance even at high temperatures exceeding 200°C.

Dielectric constant

The dielectric constant of SUMIKAEXCEL PES is constant from 60 Hz to 1 GHz, and becomes slightly higher even when the molded product absorbs water.

Figure 3-6-1 Temperature dependence of dielectric constant

Figure 3-6-1 Temperature dependence of dielectric constant

Figure 3-6-2 Frequency dependence of dielectric constant

Figure 3-6-2 Frequency dependence of dielectric constant

Dielectric tangent

The dielectric tangent of SUMIKAEXCEL PES is stable at a low value of approximately 0.001 in the temperature range of 20 to 150°C. The frequency dependence of the dielectric tangent is approximately 0.004 even at 1GHz.

Figure 3-6-3 Temperature dependence of dielectric tangent (60Hz)

Figure 3-6-3 Temperature dependence of dielectric tangent (60Hz)

Figure 3-6-4 Frequency dependence of dielectric tangent (room temperature)

Figure 3-6-4 Frequency dependence of dielectric tangent (room temperature)

Volume resistivity

SUMIKAEXCEL PES has a high volume resistivity of 10 11 Ω·m even at 200°C.

Figure 3-6-5 Temperature dependence of volume resistivity (polarization time 1000 sec)

Figure 3-6-5 Temperature dependence of volume resistivity (polarization time 1000 sec)

Insulation

SUMIKAEXCEL PES exhibits high insulation properties, and these properties hardly decrease even when the temperature rises.

Figure 3-6-6 Temperature dependence of dielectric breakdown strength of SUMIKAEXCEL PES

Figure 3-6-6 Temperature dependence of dielectric breakdown strength of SUMIKAEXCEL PES