Table 1.

Density (at 20 °C), dielectric parameters (permittivity and loss factor, both at 20 °C and 50 Hz), and conductivity (20 °C, 50% r.h.) of polyamides, polyesters, and epoxy resins [18].

Parameter	Polymer
	Polyamides	Polyesters	Epoxy Resins
Density (g·cm−3)	1.13–1.21	1.22–1.26	1.10–1.25
Permittivity	3.6–7	3–4.9	3.7–4.2
Loss factor	0.014–0.15	0.008–0.06	0.007–0.009
Conductivity (S·m−1)	10−11–10−6	10−13–10−12	10−15–10−14