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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.
In 2008, Nordson's assembly facility in Swainsboro, Georgia (with a staff of 67 employees) was the subject of a "Best Plants" profile by IndustryWeek magazine. [6] Nordson EFD won the 2010 SMT Vision Award for its UltimusTM V High-precision Dispenser. [7] Nordson ASYMTEK received an Intel Corporation’s Preferred Quality Supplier (PQS) award ...
For example, if the paint is applied in a wet film at a 100 μm thickness and the volume solid of paint is 50%, then the dry film thickness (DFT) will be 50 μm as 50% of the wet paint has evaporated. Suppose the volume solid is 100%, and the wet film thickness is also 100 μm.
The ability to gauge thickness measurement without requiring access to both sides of the test piece, offers this technology a multitude of possible applications. Paint thickness gauges, ultrasonic coating thickness gauges, digital thickness gauges and many more options are available to test plastics, glass, ceramics, metal and other materials.
Each bar will give a "theoretical wet film thickness" or, in other words, the thickness of the coating that should remain on the drawdown card after application. Even with high manufacturing tolerances, the actual wet film thickness can vary from 50% to 90% of the gap. There are multiple types of bar applicators, their forms and uses are shown ...
The grooves decrease in depth from one end of the block to the other, according to a scale stamped next to them. A typical Hegman gauge is 170mm by 65mm by 15mm, with a channel of grooves running lengthwise, 12.5mm across and narrowing uniformly in depth from 100 μm to zero and used to determine particle size. [3]
The wet film thickness will fall between the clearance of the shortest tab that is wet and the clearance of the next shortest dry tab. Dial indicator, also known as a dial test indicator, dial gauge, or probe indicator an instrument used to accurately measure small linear distances. Feeler gauge: a simple tool used to measure gap widths.
There are numerous steps in thick film manufacturing which need careful control, like roughness of the substrate, curing temperatures and times of pastes, selected stencil thickness vs. paste type, etc., [10] [11] Therefore the number of pastes used and process steps define the complexity of the process and cost of the final product.
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