In this work, the volume electrical resistivity and dielectric loss tangent of viscose/polypropylene multipurpose nonwoven fabrics were examined. According to the obtained results, the changes in the volume electrical resistivity depend on the applied chemical bonding agent, viscose fiber content, moisture content, fabric thickness, fabric weight, and relative air humidity. Based on the volume electrical resistivity hysteresis, the portion of sorbed moisture retained in the material after desorption, as well as the portion of moisture removed from the material during desorption, were determined. Furthermore, the dielectric loss tangent measured at the frequency range between 30 Hz and 140 kHz, for the samples exposed to different relative air humidity (40 % and 80 %) and wet samples, is dependent on the chemical bonding agent, viscose fiber content, moisture content, as well as frequency of the external electric field. The dielectric loss tangent measured at 80 % relative air humidity showed a peak at about 100 Hz, while for the wet samples, the peak was observed in the frequency range between 30 and 140 kHz. In a wet state, the dielectric loss tangent is primarily influenced by the water molecules present in the sample.

在这项工作中，检查了粘胶/聚丙烯多用途无纺布的体积电阻率和介电损耗正切。根据获得的结果，体积电阻率的变化取决于所施加的化学粘合剂，粘胶纤维含量，水分含量，织物厚度，织物重量和相对空气湿度。基于体积电阻率滞后，确定解吸后保留在材料中的吸附水分的部分以及解吸过程中从材料中除去的水分的部分。此外，对于暴露于不同相对空气湿度（40％和80％）和潮湿样品的样品，在30 Hz和140 kHz频率范围内测得的介电损耗正切取决于化学键合剂，粘胶纤维含量，水分含量以及外部电场的频率。在80％相对空气湿度下测得的介电损耗角正切在约100 Hz处出现峰值，而对于湿样品，在30至140 kHz的频率范围内观察到该峰值。在湿润状态下，介电损耗角正切主要受样品中存在的水分子的影响。