Electrical Properties

Volume Resistivity

The volume resistivity of a material is defined as the electrical resistance indicated by the unit cube of the material, which indicates the current flowing through the material when a voltage of DC 500V is applied to the material for one minute. The higher the electrical insulation, the higher the volume resistivity. SUMIKASUPER LCP has high insulation due to the strong orientation of the skin layer.

Figure 3-6-1 Volume Resistivity and Electric Strength of SUMIKASUPER LCP

Figure 3-6-1 Volume Resistivity and Electric Strength of SUMIKASUPER LCP

Insulation Characteristics

The electric strength is an index for indicating how high a voltage a material can withstand without causing dielectric breakdown. Test results are reported in kV/mm, and the dielectric strength is affected by the thickness and temperature of the test piece. The electric strength of SUMIKASUPER LCP increases as the thickness decreases, similar to the tensile strength. In addition, the electric strength remains high when heated, so it has excellent insulation characteristics.

Figure 3-6-2 Thickness Dependence of Electric strength
of SUMIKASUPER LCP

Figure 3-6-2 Thickness Dependence of Electric strength of SUMIKASUPER LCP

Figure 3-6-3 Temperature Dependence of Electric strength
of SUMIKASUPER LCP

Figure 3-6-3 Temperature Dependence of Electric strength of SUMIKASUPER LCP

Dielectric properties

SUMIKASUPER LCP possess low, stable values for the dependence of dielectric constant and dielectric dissipation factor on temperature and frequency.The dielectric dissipation factor of LCP is especially low in the gigahertz range.

Figure 3-6-4 Temperature Dependence of Relative permittivity

Figure 3-6-4 Temperature Dependence of Relative permittivity

Figure 3-6-5 Frequency Dependence of Dielectric Dissipation Factor

Figure 3-6-5 Frequency Dependence of Dielectric Dissipation Factor

Table 3-6-1 Electrical Properties of SUMIKASUPER LCP

Test item Test method E5008L E5008 E5204LB E4008 E4205R E6008
Relative
permittivity
1kHz IEC 60250 4.7 4.7 - 4.5 - 4.4
1MHz 4.2 4.2 3.1 3.9 2.9 3.9
1GHz 3.7 3.7 3.0 3.7 2.8 3.8
10GHz IEC 62810 3.8 3.7 3.0 3.6 2.9 3.7
Dielectric
dissipation
factor
1kHz IEC 60250 0.013 0.015 - 0.018 - 0.022
1MHz 0.031 0.031 0.018 0.034 0.013 0.032
1GHz 0.005 0.005 0.006 0.005 0.004 0.005
10GHz IEC 62810 0.005 0.005 0.012 0.006 0.005 0.006
Test item Test method E6006L E6007LHF E6807LHF SR1009
Relative
permittivity
1kHz IEC 60250 4.3 - 4.3 -
1MHz 3.7 3.8 3.8 4.0
1GHz 3.7 3.8 3.5 4.0
10GHz IEC 62810 3.5 3.6 - 4.0
Dielectric
dissipation
factor
1kHz IEC 60250 0.023 - 0.020 -
1MHz 0.034 0.026 0.030 0.008
1GHz 0.005 0.005 0.004 0.003
10GHz IEC 62810 0.005 0.005 - 0.005

Table 3-6-2 Electrical Properties of SUMIKASUPER LCP

Test item Test method E6205L SR1205L E6808LHF E6808UHF SV6808THF SV6808GHF
Relative
permittivity
1kHz IEC 60250 - - - - - -
1MHz 3.0 2.8 3.8 3.8 3.8 3.8
1GHz 2.9 2.8 3.6 3.5 3.5 3.5
10GHz IEC 62810 2.8 2.7 3.7 3.6 3.7 3.7
Dielectric
dissipation
factor
1kHz IEC 60250 - - - - - -
1MHz 0.024 0.007 0.038 0.033 0.012 0.029
1GHz 0.005 0.002 0.004 0.004 0.004 0.004
10GHz IEC 62810 0.005 0.003 0.005 0.004 0.004 0.005
Test item Test method SR2506 SR2507 SZ6505HF SZ6506HF
Relative
permittivity
1kHz IEC 60250 - - - -
1MHz 3.6 3.7 3.8 3.5
1GHz 3.5 3.5 3.4 3.5
10GHz IEC 62810 3.6 3.7 3.5 3.6
Dielectric
dissipation
factor
1kHz IEC 60250 - - - -
1MHz 0.029 0.029 0.023 0.011
1GHz 0.004 0.004 0.004 0.005
10GHz IEC 62810 0.003 0.003 0.004 0.003
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