The high-temperature zone-drawing (HT-ZD) method was applied to nylon 46 fibres to improve their mechanical properties. The HT-ZD treatments were carried out three times at different temperatures between 200 and 235 degrees C. The draw ratio and crystallinity increased stepwise with the processing, and those of the HT-ZD3 fibre were 5.6 times and 51%, respectively. The HT-ZD3 fibre finally obtained had a Young’s modulus of 7.2 GPa and a tensile strength of 1.0 GPa. The dynamic storage modulus (E’) increased stepwise with the processing as well and was 8 GPa at 25 degrees C for HT-ZD3 fibre.