Odour formation in textile material is mainly based on the fibre content and also the constituent fibres’ chemical and physical structures. Polyester fibre materials are very profound to form odour after being worn due to their highly oleophilic nature. The purpose of this paper is to analyse the odour formation characteristics of polyester fabric after surface modification through alkali treatment.
Five male participants were allowed to use the alkali-treated and untreated polyester fabrics, which were fixed in the axilla region of their vest. Subjective and objective odour analyses were performed for the worn samples. The odour was evaluated in terms of intensity rating, bacterial population (CFU/ml) and bacterial isolation.
The results showed that alkali treatment was effective in odour reduction in polyester fabric (p<0.005). The bacterial population density was also reduced significantly (p<0.005) in the alkali-treated polyester fabric compared to the untreated polyester fabric after the wear trial. The alkali treatment affected the surface structure of the polyester fabric and thus changed it from hydrophilic to hydrophobic. This was confirmed by the moisture management test results.
The odour formation in the polyester fabric can be controlled by simple surface modification process like alkali treatment, and thus the value of the product can be increased in the apparel sector.
