Abstract
Partially oriented yarns of polyester and polyamide of two different deniers were simultaneously drawn and dyed on the melt spinning unit using solvent crazing technique at room temperature and just above their corresponding glass transition temperature with crude disperse dyes dissolved in benzyl alcohol. The same yarns were dyed by conventional methods with commercial disperse dyes after converting them into fully drawn yarns. The depth of dyeing obtained by solvent crazing technique was more than the dyeing of yarn by conventional method without any adverse effect on the fastness and mechanical properties. The depth of the shade did not change even after running the yarn for 600 meters indicating that thousands of meters of these yarns could be dyed while manufacturing without any shade variation. The proposed process can be used to reduce the consumption of energy as well as saving of cost that is incurred during manufacturing of commercial disperse dyes.
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