How to apply the conformal paint? |
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| Reading Volume： 【 1681 】 | Time： 【 2017-06-02 】 | |
| Brushing is the simplest method of application. It is usually used for partial repair and maintenance, and can also be used in laboratory environment or small batch trial production/production, generally where the coating quality requirements are not very high. So how to brush the three-proof paint on the PCB board? What are the benefits of brushing? The advantage of the brush coating method is that almost no investment in equipment and fixtures is required; coating materials are saved; generally, no covering process is required. The disadvantage is that the scope of application is narrow; the efficiency is the lowest; the whole board has a masking effect when brushing, and the coating consistency is poor. Due to manual operation, defects such as bubbles, ripples, and uneven thickness are easy to appear; a lot of manpower is required. Precautions: 1. Before brushing, make sure that the diluted product is fully stirred, and it is best to leave it for 2 hours. 2. Metal or plastic containers should be used for the three-proof paint, wood and PVC are not allowed, because chemical reactions will occur, which will corrode the container and damage the product. 3. Clean and bake the board to remove moisture and moisture. 4. The dust, moisture and oil on the surface of the object to be coated must be removed. Thorough cleaning can ensure that the corrosive residue is completely removed, and the conformal paint will adhere well to the surface of the circuit board. 5. The choice of brush is also very important, because the product is not insulated before the product is cured, so you should choose an anti-static, non-linting brush, such as a high-quality natural fiber brush. 6. When brushing, the board should be placed as flat as possible. After brushing, there should be no dripping, and the brushing should be flat, and there should be no exposed parts. The range of 0.1-0.3mm is appropriate. 7. Do not place the painted circuit board upside down, as this will make the coating thinner and thicker, so it must be laid flat. |
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