Thanks to their finer denier per filament, the microfilament fabrics show dynamic flexural rigidity and lower bending recovery Polyester fibre completed its Golden Jubilee in 1992. Polyester arrived late in the family of the synthetic manmades but has conquered the leading position among the major synthetic fibres, leaving its competitors far behind in both market volume and product variety. But the early 1980s saw stagnation among manmade fibre producers. The traditional markets for yarns and apparel fabric were saturated and new outlets were being sought; meanwhile the concepts of clothing physiology, functional clothing and burden from market resulted in the production of microfilament yarns, which can be defined as filaments finer than 1.0 dtex (0. 9 denier). Shirting and dhoti fabrics were woven at Ichalkaranji with normal and microfilament polyester yarns, and these samples were processed under the same conditions. All fabric samples were scoured under mild alkaline conditions at 70℃. For 1 to 1.5 hrs. they were further bleached with Potassium permanganate followed by hydrogen peroxide treatment at 85℃ for 45 minutes. After bleaching all the samples were heat-set at 180℃ for 40 seconds, then the shirting samples were dyed in jet with disperse dye (1) at 130℃. Then the fabrics were dried followed by a soft finish, as preferred for microfilament fabrics.
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