The axial creep of a textile fibre produced from a blend of fibre-grade polypropylene with 5 wt% of commercial atactic polystyrene was measured for 4 h over a range of stresses and temperatures. Using a combined time-temperature-stress superposition principle, a master curve was constructed, taking the reference temperature as room temperature. The master curve was found to cover a period of over 120 years, which is the lifetime of some geotextiles used in reinforcing applications, and could be of interest to designers of such products.