Patent ID: 6884281
Filing Date: 2005-04-26
Classification: B01D,B03D,G03C

Abstract:
1. A method for preparation and deaeration of a coating liquid, the method comprising: a first step of stirring and mixing a plurality of coating liquid constituent liquids fed into a stirring tank at such a low speed that bubbles are not formed to prepare a coating liquid, and removing bubbles in the liquid under reduced pressure; a second step of applying an ultrasonic wave to the coating liquid after the first step under one of atmospheric pressure and reduced pressure in a floatation tank to cause bubbles in the coating liquid to grow and gather and float to a surface of the liquid, thereby removing the bubbles in the liquid; and a third step of continuously feeding the coating liquid after the second step through a pipeline in such a manner that no liquid surface is created, and applying an ultrasonic wave to the coating liquid flowing through the pipeline under pressure to dissolve bubbles in the coating liquid, thereby removing the bubbles in the coating liquid.