Copper wires are used widely in making electrical wires, cable industry in motors and electric generators. Pure copper is quite soft and malleable therefore it is annealed first that is it is toughened by firstly heating it to a considerable temperature till it glows hot and then cooling in air. Thereafter tin is used to make an insulating material in order to cover copper wire. This coating to form tin copper wire is mainly done by either electrolytic process or hot dip process.
Another product in line is copper flat wire. Copper flat wire also called as electromechanical strip is rectangular or square shaped wire having been rolled from round wire. A roll-draw unit is used to draw copper flat wire from circular inlets in one go. Two stands of sheet like rolls are produced by flattening circular copper stands. Afterwards annealing is done at the vacuum annealing unit in tamper-proof gas atmosphere to produce copper flat wire. This kind of copper is used mainly in copper windings in transformer, transport motors bus bars and trolley motors.
A copper foil is the third copper product used mainly for decorative purposes as an alternative to lead. Here coppers are cut into sheets of varying width and are used as covering to make colored or stained glasses. These are kept as arte facts in churches, cathedrals and houses of wealthy people to give an aesthetic and picturesque look. Copper foils can be used to make printed circuit board where copper sheets are laminated onto a non conductive substrate.
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