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This study was undertaken to investigate the effect of P/C blend ratio and break draft on yarn quality and physical properties. 15 tex yarn samples were spun from three blend ratios, i.e., P/C 30/70, 50/50, and 70/30 at ring frame with six break drafts (1. 35, 1.38, 1.42, 1.45, 1.49, and 1.53). The results of blend ratio were analyzed through linear regression technique to predict correlation between two variables. Strong correlation observed between blend ratio and yarn quality and physical properties, as the share of polyester increased all yarn characteristics improved. Prominent improvement in yarn mass variation and hairiness was observed when polyester percentage increased from 30% to 50% whereas tenacity and elongation improved more remarkably when polyester share increased to 70% from 50%. Most of the yarn characteristics were found optimum at break draft 1.49.

In this research a hydrophobic surface of 100% cotton woven fabric was developed by sol-gel technique. Fabric samples were dyed with Drimarene Reactive Red 5B and Drimarene Reactive Blue BR dyes (0.5% and 3% o.w.f) and then treated with a combination of silica nanoparticles, silane hydrophobes (alkyltrialkoxysilanes), and silane cross-linkers i.e, tetraethoxysilane (TEOS) and teramethoxysilane (TMOS) by dip-dry-cure process. After coating, wash durability of dyed samples was investigated for water repellency and water uptake according to AATCC standards. The effect of coating on dyeing behavior was assessed by measuring the (K/S)λmax value, while change in color (ΔE) and fastness properties of coated fabric also investigated. It has been observed that durable hydrophobicity achieved on cotton reactive dyed fabric through non-fluorine sol-gel route with silica nanoparticles with better fastness properties with little effect on shade.

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