Abstract
The objective of this research was to investigate the use of crosslinked poly(N‐vinyl‐2‐pyrrolidone) (PVP) to coat polyester/cotton knitted fabric, without adversely affecting its dyeing properties. Before dyeing, the knitted fabrics were tested for bursting strength to assess the influence of the coating on their resistance. The dyeing parameters were evaluated as the exhaustion (%), K/S value, colour difference (ΔE), relative strength (RS %) and colour fastness to washing. Bursting strengths were 9.4 for coated and 9.7 kgf cm−2 for uncoated knitted fabric samples, confirming an insignificant loss in resistance. In the evaluation of K/S, ΔE and RS%, the values for the samples with the highest concentration of PVP were the most different to those for the standard sample. The colour fastness showed satisfactory results indicating that neutralisation and washing after dyeing were effective. These results could lead to increased quality in the textile industry, adding value to products.
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