How to test the performance of defoamer
In the current industrial production field, defoamers are the most outstanding products in the modern production field. They are the products with the best effects. However, some professional manufacturers bought materials of relatively poor quality after listening to the salesmen’s deception when purchasing materials. After returning to the application, they found that the effect was not particularly ideal. So, how to distinguish the quality of defoamer products when purchasing? Let’s see what professionals say.
According to professionals engaged in the research and development of defoamer products, defoamers are products that are often used in the current industry. When purchasing, they must use the best method to distinguish. We can use the measuring cylinder method, the specific gravity cup method, the vibration method and other methods to detect. Let’s see how the following is introduced:
1. Measuring cylinder method: Add an appropriate amount of low-viscosity paint to the measuring cylinder, then add the defoamer, shake it and observe the height of the foam every once in a while.
2. High-speed stirring method: Suitable for low-viscosity paint, the foam level is measured after high-speed stirring.
3. Specific gravity cup method: Suitable for high-viscosity paint, the paint and defoamer are added to the homogenizer for high-speed stirring, and then the height and density of the foam are measured.
4. Circulation method: After coating, the remaining paint will fall into the container, and the height of the paint should be recorded at regular intervals.
5. Bubble method: Suitable for low-viscosity paint, introduce air to make the paint produce foam, add defoamer and regularly drain the air, and record the height of the foam in time.
6. Vibration method: Vibrate repeatedly, and then measure the density of the foam.
Adding defoamer to lubricating oil can quickly eliminate foam and improve the quality of lubricating oil.
1. Squeeze into the bubble film: The defoamer adsorbs on the bubble film of the lubricating oil, and then penetrates into it, completely eliminating the bubbles and weakening the attraction of the molecules.
2. Reduce the surface tension of the bubble film: The defoamer adsorbs on the bubble film in the lubricating oil to reduce the surface tension, and the bubbles will burst due to uneven tension.
