Influence of chemical processing On functional properties of handmade woollen carpets

Abstract

Handmade carpets made in India are mainly wool oriented. Premium quality handmade newlinecarpets are either Turkish hand knotted of Persian hand knotted. Hand knotted carpets newlineafter knotting in vertical loom are subjected to chemical washing to improve its look and newlinelustre/sheen. The carpets are given chemical treatments sequentially with diluted sulphuric newlineacid followed by bleaching powder solution and washing. Treatment of diluted sodium newlinehydroxide solution is given finally which is followed by rinsing and neutralisation. There newlineis no standardized method existed in the industry for such chemical treatment. The newlineresidual presence of active chlorine in carpet may give rise to AOX problem due to which newlinemost of the washed carpets do not meet the present global standard of REACH. Carpets, newlinethen, are no more eco-friendly because of the presence of harmful chemicals. newlineNo literature on chemical washing of carpet is available although actions of alkali newlineon wool or action of acid on wool has been studied. The sequential treatment on woollen newlinecarpet is a new process that needs to be standardised. newlineA study on the Influence of Chemical Processing on the Functional Properties newlineHandmade Woollen Carpets was taken to investigate the influence of chemicals on newlinefunctional properties of handmade woollen carpet. The foremost purpose of the study was newlineto develop lustre on woollen carpet. Sequential treatments of woollen yarn and carpets newlinewere carried out with sulphuric acid, sodium hypochlorite and sodium hydroxide. Initially newlinewoollen yarn was selected for the purpose. newline newline newline newline newline newline newline newline newline newline newline newline newline newline newline newline newline newline newline newline