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Application of ultra-thin polymer coating on metallic wires

Yu, Juan (1992) Application of ultra-thin polymer coating on metallic wires. Master of Engineering thesis, Dublin City University.

In this study, the coating of fine wires using hydrodynamic pressure technique has been investigated theoretically and experimentally. One of the principal aims of the project is to establish the minimum possible coating thickness on fine wires which can be applied by means of hydrodynamic technique. Models based on steady, uniform and laminar flow of Newtonian as well as non-Newtonian fluid for polymer coating for the process of plasto-hydrodynamic wire coating in a stepped bore unit have been developed. The closed form analytical solution is established in cylindrical coordinate since the practical case is a mathematical axisymmetric problem. The comparison of theoretical results between Newtonian and non-Newtonian fluid, and Cartesian and cylindrical coordinate systems has been made. The experimental procedures and methods have been outlined, a melt chamber and a die unit have been designed and used, and investigations into a wide range of coating and drawing conditions have been carried out. The experimental work includes by the polymer of low density polyethylene (Escoren) coating on stainless steel wires with three diameters ranging from 0.1 - 0.4mm, varying the temperature of the polymer melt between 120 - 155°C, converting the different diameters of dies ranging from 0.2 - 0.5mm, and shifting the drawing speed between 0.08 - 1.31m/s. The experimental data have been processed and presented graphically. Some significant conclusions have been made.
Item Type:Thesis (Master of Engineering)
Date of Award:1992
Supervisor(s):Hashmi, Saleem
Uncontrolled Keywords:Metals Surfaces; Coatings; Surface technology; Fine wires
Subjects:Engineering > Materials
Engineering > Mechanical engineering
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 License. View License
ID Code:19160
Deposited On:23 Aug 2013 13:48 by Celine Campbell . Last Modified 23 Aug 2013 13:48

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