Acrylic conformal coatings provide good flexibility and all round protection for your electronic boards. As one part systems, they are easy to apply and easy to remove so handling is not an issue. Some acrylics meet military standards, they dry quickly rather than cure and are solvent removable.A professional Coating Machine should be able to perform conformal coating, as this is one of the most protective types of coatings out there. There are several types of conformal coating materials used today and this article is focused around them. We will discuss briefly on what these materials are, and how they work in order to protect your device through their coating.
Silicone conformal Coating Machine are available both in solvent resistant and solvent removable forms. They work better at higher temperatures, and provide excellent chemical and salt spray resistance. The solvent resistant products however are more difficult to remove, although they can be soldered through. They cross link with time saving however, maximum performance heat curing may be required. Silicons have remarkable electrical insulation properties making them ideal for high power and highly populated boards, and in such manner you can be sure that your personal computer is partially silicone coated.
UV coatings use ultra violet energy to initiate the curing process are solvent free. This means that they are non flammable, and they comply with current and proposed environmental legislation. They provide high chemical and heat resistance, flexibility and gloss, and give excellent adhesion and coverage on lead ends. Curing times are a fraction of other Coating Machine and can be done in a matter of seconds, greatly reducing production costs by increasing production speeds.Polyurethanes can be one or two part systems. The most useful products for coating applications are single part systems. They offer excellent moisture and chemical resistance and good electrical characteristics. They are not easily removed once cured so the components which benefit from this treatment tend to stay loyal.
Specialty acrylics were introduced to the market lately because of their extremely low surface energy. This means that any moisture will be instantly repelled and avoided. They are applied in extremely thin and weak films, making masking unnecessary as the film is easily removed by mechanical action by inserting an edge connector. As the film has low strength, it does not tend to offer the same level of protection as conformal Coating Machine, but for high volume production where moisture resistance is the main concern, fluoro acrylics offer enormous benefits.
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