How to clean the three-proof paint?

In daily life, the application of electronic devices is becoming more and more widespread. To ensure product quality and reliability, the application of Schneith conformal coatings is also becoming more and more common. After we use conformal paint, we often need to clean up part or all of the conformal paint. Once we take the wrong method to clean up the conformal paint on the item or product, it will cause more or less damage to the item or product, so how to clean it? How to clean up without damaging the items? This is especially important at this time. In modern industrial production and electronic device manufacturing, conformal coatings are widely used to protect electronic components from moisture, dust, and chemicals. However, over time or in some specific situations, it may be necessary to clean up the conformal paint. So, how to clean up conformal paint?

First of all, before cleaning, we need to understand the characteristics of conformal paint. Generally speaking, conformal paint has strong adhesion and durability, but it is not impossible to remove. Common types of conformal paints include acrylic, silicone, and polyurethane, and different types of conformal paints may have differences in cleaning methods.

For acrylic conformal paints, organic solvents can usually be used to clean them. For example, alcohol, acetone or banana water can effectively dissolve and remove acrylic conformal paint. When using organic solvents, care should be taken to avoid skin and eye contact, and to operate in a well-ventilated environment to prevent harmful gases generated by the volatilization of organic solvents from causing harm to the human body.

Silicone conformal coatings are relatively difficult to clean because silicones have high chemical stability. Generally, special silicone cleaners or abrasives can be used to clean it. These cleaning agents or abrasives can effectively remove silicone conformal paint, but you need to pay attention to the control of strength and time when using them to avoid damage to electronic components.

Polyurethane conformal paints are cleaned in a similar way to acrylics and can be dissolved and removed using organic solvents. However, it should be noted that different brands and models of polyurethane conformal paints may have different tolerances to organic solvents, so sufficient testing and testing should be carried out when choosing cleaning agents.

In addition to using organic solvents, mechanical cleaning can also be used to remove conformal paint. For example, the surface of the conformal paint is sanded with tools such as sandpaper, grinding wheels or grinders, and then cleaned with cleaning agents. This method is suitable for situations where conformal paint removal requirements are high or organic solvents cannot be used, but attention should be paid to controlling the intensity and time of polishing to avoid damage to electronic components.

Before cleaning, electronic components should be protected to avoid damage caused by cleaning agents or tools.

When cleaning conformal paint, you also need to pay attention to the following points:

Choose the right cleaning tool and cleaning agent, depending on the type and characteristics of the conformal paint.

(1) Use solvent cleaning: Use appropriate chemical solvents (such as alcohol, acetone, banana water, special cleaners, etc.) to dissolve conformal paint. Pour the solvent onto a clean cloth or cotton swab and gently wipe the area of the board that needs to be cleaned. This method is suitable for cleaning up small areas. When using, we should pay attention to ensure that the solvent is effective against conformal paint, and pay attention to operation safety, avoid skin and eye contact, and ensure good ventilation.

(2) Heating purging: Use a heat gun or hair dryer to heat the conformal paint coating to soften the coating. After the coating has softened, use a brush or compressed air to blow to remove the conformal paint coating. This method is suitable for large-area cleanup. Control the temperature during heating to avoid damage to the circuit board or components due to overheating.

(3) Mechanical grinding: For thicker conformal coatings, fine sandpaper or polishing cloth can be used to gently sand until the Schneifert conformal coating is removed. When polishing, it is necessary to avoid damage to the circuit board or components.

(4) Chemical peeling: Use a special chemical stripper to apply it to the surface of the conformal paint, let the stripper act for a certain period of time according to the instructions of Schneith conformal paint, and then use a scraper or brush to remove the coating. During the stripping process, we follow safe operating procedures to avoid contact with unprotected electronic components.

Regardless of the method, appropriate protective gear such as gloves, goggles, and overalls should be worn during cleanup for our own safety. When handling chemical solvents, also ensure that the working environment is well ventilated. At the same time, when cleaning the conformal paint or other conformal paint, it is also necessary to protect the components on the circuit board from damage.

Pay attention to safety during the cleaning process, avoid skin and eye contact, and keep good ventilation.

The cleaned electronic components should be thoroughly cleaned and dried to remove any residual cleaning agents and moisture.

In short, the cleaning of conformal paint requires choosing the appropriate cleaning method and tools according to its type and characteristics, and paying attention to safety and protection of electronic components. Before cleaning, it is best to test and test to ensure the effectiveness of cleaning and safety for electronic components.