Tensile behaviours of quartz, aramid and glass filaments after NaCl treatment

Quartz, aramid and glass filaments were treated with NaCl solutions of various concentrations for different periods of time. The appearance of the treated filaments was examined. It revealed that for the quartz fibre the NaCl density and the treatment time have a minor effect as far as the decrease rate of the fibre strength is concerned. After three weeks of NaCl treatment, dramatic degradation of the aramid filaments was noticed for all the NaCl densities used in the investigation. The glass fibre degradation induced by the NaCl solution was considered regular; both higher NaCl concentration and prolonged treating time would both promote the decrease of the fibre strength.