Abstract
In the case of measuring dielectric constant and loss factor of fiber itself, there are such difficulties as the anisotropy of fiber, the great influence of water sorption, and the fact that they can be measured only in the condition of the existence of the air or the other medium; therefore, in this report, the authors explain about the apparatus and the operation for measuring the dielectric properties of fiber itself, perfectly controlling these factors. In the measurement of moistened samples at low frequency region (50 c/s-20 kc/s), the effect of conduction current being great, the results of the measurement can not be analysed by Cole-Cole's circular arc law, which is applicable to dipole polarization.In such a case, by the method of plotting complex resistivity instead of complex dielectric constant, a circular arc corresponding to Cole-Cole's is obtained and the frequency characteristic can be represented by a few constants.
