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The substrate is then rotated at speeds up to 10,000 rpm to spread the coating material by centrifugal force. A machine used for spin coating is called a spin coater, or simply spinner. [1] Rotation is continued while the fluid spins off the edges of the substrate, until the desired thickness of the film is achieved.
Slot-die coating is a non-contact coating method, in which the slot-die is typically held over the substrate at a height several times higher than the target wet film thickness. [23] The coating fluid transfers from the slot-die to the substrate via a fluid bridge that spans the air gap between the slot-die lips and substrate surface.
There are four basic parameters that are involved in spin coating: solution viscosity, solid content (density), angular speed, and spin time. [13] A range of thicknesses can be achieved by spin coating. Most commonly the thicknesses range from 1-200 μm. The main properties that affect the thickness of the film are viscosity and spin speed.
Spin casting, also known as centrifugal rubber mold casting (CRMC), is a method of utilizing inertia to produce castings from a rubber mold. Typically, a disc-shaped mold is spun along its central axis at a set speed.
The thickness of the metal to be spun can vary from about 0.1 mm (0.004 in) to 120 mm (4 or 5 in) on special machines and with hot material. The most common thickness, however, are 0.6 to 1.3 mm (0.024 to 0.050 in). Maximum thickness and size are limited only by the size of the equipment and the power available to make the metal flow.
With a wall thickness range from 2.5 to 125 mm (0.098 to 4.921 in). ... Spin casting – Method of utilizing centrifugal force to produce castings from a rubber mold;
Twin Disc, Inc. designs, manufactures, and distributes power transmission equipment for a wide range of applications, including marine, off-road vehicle, and industrial. The company was founded in 1918 to manufacture clutches for farm tractors. [2]
Molecular weight, molecular-weight distribution and architecture (branched, linear etc.) of the polymer; Solution properties (viscosity, conductivity, and surface tension) Electric potential, flow rate and concentration; Distance between the capillary and collection screen; Ambient parameters (temperature, humidity and air velocity in the chamber)