A system and process for defoaming and recycling

Abstract

The invention belongs to the technical field of charge-discharge control devices and methods for de-foaming mechanisms, and discloses a de-foaming and recycling system and process. A new liquid material enters a stirring tank under the action of a vacuum pump and a suction pipe and is stirred at constant speed and constant temperature; the stirred liquid material is fed into a first vacuum de-foaming tank through a metal pipeline under the action of vacuum suction force and is de-foamed primarily; the liquid material which is de-foamed primarily is fed into a second cascade type de-foaming tank through a metal pipeline under the action of the vacuum suction force and is de-foamed secondarily; the liquid material which is de-foamed secondarily is fed into a third vacuum de-foaming tank through a metal pipeline under the action of the vacuum suction force and is de-foamed for the third time; the liquid material which is de-foamed for the third time; enters a storage tank under the action of the vacuum suction force and is directly subjected to optical disk spin-coating operation; after the optical disk spin-coating operation is performed, the remaining liquid material flows into a recycling tank, flows into the stirring tank under the action of the vacuum suction force, and is mixed with a new liquid material for continuous use so as to be recycled. The system and the process are low in cost, easy to operate and high in de-foaming efficiency, and cannot affect the physical and chemical performances of the de-foamed liquid material; the liquid material can be continuously fed, de-foamed, used and recycled.

Description

technical field [0001] The invention relates to a defoaming and recycling system and its process, and belongs to the technical field of a defoaming mechanism feeding and discharging control device and method. Background technique [0002] In the spin coating process of the optical disc protective layer, if the spin coating liquid contains a bubble, the bubble will stay on the surface of the optical disc. When the laser reader focuses the beam to read data, the existence of air bubbles will cause the laser to fail to focus, resulting in data reading failure. Therefore, in the spin-coating preparation of the optical disc protective layer, no air bubbles are allowed in the protective layer, that is, no air bubbles are required in the spin-coating liquid. At present, the defoaming process mainly includes centrifugal defoaming, static defoaming, high temperature defoaming, ultrasonic vibration defoaming, vacuum defoaming, chemical defoaming, etc. The centrifugal defoaming time ...

AI Technical Summary

Problems solved by technology

It takes a long time to stand for defoaming, but the cost is low, and the effect is not obvious for liquid materials with high viscosity

High temperature degassing will accelerate the bubble escape rate, but the degassing time is long, and the high temperature will easily affect the physical and chemical properties of the liquid material

Although ultrasonic vibration degassing has a fast bubble escape rate and does not affect the physical and chemical properties of the degassing liquid material, it takes a long time for vacuum degassing and is not suitable for continuous operation, but it can be used together with other degassing processes

Chemical defoaming has a certain effect on low-viscosity liquid materials, but adding chemicals will affect the quality of the product

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