-
Product Center
-
-
Contact Us
咨询热线
手机
18142863185
关注我们
公众号
关注公众号
- Top
Brief Overview of the Three-Proof Coating Application Process
Release time:
2025-12-15 17:19
Three-proof coatings are functional materials that form a dense protective film on the surface of electronic circuit boards, effectively shielding them from environmental factors such as moisture, dust, and mold. This helps enhance the long-term operational stability and reliability of electronic products. In practical applications, depending on production scale, product structure, and process requirements, different application methods—such as spray coating, dip coating, and brush coating—can be employed.
I. Spray Coating Process
The spray coating process leverages the principle of liquid atomization to break down the three-proof coating into tiny droplets using high-pressure gas. These droplets are then sprayed onto the surface of the object being coated at high speed, forming a uniform coating. The key parameters in this method include droplet size, spray velocity, and the distance between the spray gun and the surface of the object being coated—factors that collectively determine the final quality of the coating.
1. Automated Machine Spraying: Automated machine spraying utilizes an integrated motion platform, liquid injection valves or spray valves, and pressure tanks or pumping equipment to achieve precise application of three-proof coatings. Some systems feature an in-line design that seamlessly integrates with production lines, enabling fully automated, unmanned spraying operations—making them ideally suited for large-scale manufacturing environments.
2. Manual Spraying: Compared to automated machine spraying, manual spraying is more suitable for small-batch production or repair scenarios. It requires operators to possess certain spraying skills to ensure the uniformity and quality of the coating. Although less efficient, the flexibility of manual spraying gives it an irreplaceable advantage in specific applications.
II. Dip Coating Process
The dip-coating process involves fully immersing the workpiece into a coating liquid. The liquid wets the surface and, through capillary action, ensures uniform coating application. Excess coating is then removed by lifting the workpiece out of the liquid and allowing it to drain. After curing, a complete coating is formed. This method is particularly well-suited for printed circuit boards with complex structures and three-dimensional assembly features, enabling thorough coverage of areas such as gaps and holes. During dip-coating, it is crucial to carefully control the viscosity of the coating, the lifting speed, and the cleanliness of the surrounding environment to avoid issues such as excessive coating thickness, buildup of paint, or inclusion of impurities.
3. Brush-Coating Process
Brush coating is the most basic and flexible application method, in which paint is manually applied to the surface of a workpiece using a brush. This method is simple in terms of tools and highly adaptable, making it particularly suitable for small-batch prototyping, repair work, or localized touch-ups. It allows for precise control over the thickness and extent of the coating in specific areas. During operation, the paint usually needs to be appropriately diluted, and an appropriate brush should be selected. By performing uniform, unidirectional brushing motions, bubbles and brush marks can be minimized. However, brush coating is relatively inefficient, and it’s often difficult to ensure consistent coating quality, so it’s typically not suitable for large-scale production.
IV. Summary
In the process of electronic manufacturing and maintenance, the application technique of protective coatings directly affects the final product’s protection performance and reliability. Spray coating, dip coating, and brush coating each have their own suitable applications and process characteristics. In practical applications, it is essential to make a rational selection and optimize the process by taking into account factors such as product structure, production scale, and quality requirements, thereby ensuring protective performance while enhancing production efficiency and coating quality.
| Boxing Related Product Recommendations |
||
| Three-proof adhesive |
||
| Product Model |
Product Features |
Application areas |
| B-02 (Phosphate Acrylate) |
Enhance adhesion to substrates such as metal, glass, and plastic. |
Vacuum-plated UV coatings, metallic UV varnishes, UV adhesives, UV inks |
| B-404 (Aliphatic Polyurethane Acrylate) |
Excellent flexibility and moisture stability |
UV-resistant, anti-corrosion, and anti-moisture coating; self-adhesive; dual-curing system |
| B-404C (Aliphatic Polyurethane Acrylate) |
Excellent flexibility and moisture stability |
UV-resistant, anti-corrosion, and anti-moisture coating; self-adhesive; dual-curing system |
| B-405 (Aliphatic Polyurethane Acrylate) |
Good adhesion and excellent moisture stability. |
UV-resistant three-proof coating, dual-curing system |
| B-405H (Aliphatic Polyurethane Acrylate) |
Good adhesion and excellent moisture stability. |
UV-resistant three-proof coating, dual-curing system |
| B-549 (Polyester Acrylate) |
Low viscosity, adhesion, and weather resistance |
UV base coat, UV three-proof coating, weather-resistant paint |
Disclaimer: The above content is sourced from the internet and is for reference only. If any infringement occurs, please contact us, and we will remove it promptly. 
Share to:
Related News
On the composition of conformal coatings
Electronic protective coatings, commonly known as "three-proof coatings," are critical materials that ensure the stable operation of electronic components and devices in harsh environments such as humidity, salt spray, and mold. The quality of their protective performance largely depends on the rational selection and scientific formulation of raw materials. The following analysis will focus on the raw material system from the perspective of its main components.
Various types of conformal coatings
Electronic protective coatings, often referred to as "three-proof coatings," are specialized coatings designed specifically to protect circuit boards and their components from environmental hazards. Traditionally, these coatings emphasized three key functions: moisture resistance, salt-spray resistance, and mold prevention. However, today’s products have expanded their performance to address a broader range of protection needs. Such coatings can be categorized based on their chemical composition, curing conditions, and solvent types.
Methods for testing the performance of conformal coatings
In the field of electronic device protection, performance testing of conformal coatings is a critical step to ensure their effective functioning in real-world applications. By employing scientifically standardized testing methods, we can systematically evaluate the coating's performance in terms of moisture resistance, dust resistance, and salt-spray resistance, thereby providing a reliable basis for product selection and quality control. The following sections will introduce the corresponding testing methods and key evaluation points, focusing on the main performance indicators of conformal coatings.
Fax: +86 20-3437 9190
Address: 8-9 / F,Building B,Pazhou Science and Technology Park, Xingang East Road, Haizhu District, Guangzhou City, Guangdong Province
Follow us
Copyright © Guangdong Bossin Novel Materials Technology Co., Ltd, All rights reserved.
