Development and Characterization of Polyurethane Coating On Steel Cop's For Yarn Winding Application

plastics engineering

Steel cops with Acrylonitrile Butadiene Styrene(ABS) sleeve, manufactured by an extrusion process, is generally used in yarn winding application. During the yarn winding, ABS sleeve is found to deform and fatigue failure occur after 20-25 days because of low compressive strength and low creep resistance. In order to control the deformation and premature failure, it is proposed to carry out urethane based coatings on steel cops and evaluate the performance of coating material during the usage. The experiments were performed to vary the thickness(layer by layer) of the coatings. Different techniques of coating will be used based on the rheology of the coating materials. The microscopic evaluation of coating carried out by scanning electron microscopy. The analytical techniques like FTIR, DSC, TGA employed to characterize the coated material. The effect of coated layers on the coefficient of friction also measured. The test results further analyzed for the performance evaluation of the coating w.r.t. overcoming the deficiencies in the available cops which include the compressive strength and creep resistance.

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