Electrical Properties

PES is a heat resistant material that possesses electrical insulating properties. It maintains an outstanding Relative permittivity and dielectric dissipation factor, as well as superb electrical resistance, up until temperatures exceeding 200°C.

Relative permittivity

The dielectric constant of SUMIKAEXCEL PES is constant from 60Hz to 1GHz, and is only slightly higher when molded products absorb water.

Figure 3-6-1 Temperature Dependence of Relative permittivity

Figure 3-6-1 Temperature Dependence of Relative permittivity

Figure 3-6-2 Frequency Dependence of Relative permittivity

Figure 3-6-2 Frequency Dependence of Relative permittivity

Dielectric dissipation factor

The dielectric dissipation factor of SUMIKAEXCEL PES is stable at a low value of about 0.001 at the 20 to 150°C temperature range. The frequency dependence of the dielectric dissipation factor is about 0.003 even at 10GHz.

Figure 3-6-3 Temperature Dependence of Dielectric Dissipation Factor (60Hz)

Figure 3-6-3 Temperature Dependence of Dielectric Dissipation Factor (60Hz)

Figure 3-6-4 Frequency Dependence of Dielectric Dissipation Factor

Figure 3-6-4 Frequency Dependence of Dielectric Dissipation Factor

Volume Resistivity

PES possesses a high volume resistivity of 1011 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 Properties

SUMIKAEXCEL PES has good insulation properties, and insulation remains almost the same even when the temperature increases.

Figure 3-6-6 Temperature Dependence of Dielectric Strength of SUMIKAEXCEL PES

Figure 3-6-6 Temperature Dependence of Dielectric Strength of SUMIKAEXCEL PES
Test conditions
Test method: IEC 60243-1 reference
Test piece thickness: 1.6mm
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