Abstract
The thermally stimulated currents of the model resin wool filters were measured. The model resin wool filters were the impregnated wool felts with the p-t-butylphenolformaldehyde (PTBP) resin. Wool felts did not show the characteristic spectrum of thermally stimulated current at 20∼200°C, while the model resin wool filter showed the spectrum at 185∼195°C. The intensity of spectrum increased in proportion to the quantity of PTBP resin. These results indicate that the electrostatic force of the model resin wool filters is due to the polarization within the mechanically charging impregnated resins.
