How to the best resin category for application?

May 29, 2024, 11:58 AM

TDD-global

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Resin chemicals are widely used in potting and packaging in the electronic and electrical industries, but the right choice can not be made at the beginning. Since there are so many resins to choose from, it is a challenge to decide which resin is most suitable for your application. This paper focuses on the characteristics and applications of different types of resins.

Epoxy resin

Epoxy resin is popular in the electronic industry because of its excellent electrical and mechanical properties and resistance to chemicals and high temperatures. The use of epoxy resin can prevent dust, moisture and short circuit. Because the standard epoxy resin has better thermal conductivity than air, it can more effectively dissipate heat and prolong the service life.

Polyurethane resin

Although epoxy resin is a hard sealant when curing, polyurethane resin is usually an elastomer, which is more like rubber when curing. This is especially useful if the circuit to be encapsulated contains precision components. Like epoxy resin, polyurethane resin has chemical resistance, dust and moisture resistance, excellent electrical insulation and good adhesion with most metal and plastic substrates. Unlike epoxy resin, polyurethane has lower heat release during curing, even for rapid curing systems. Polyurethane resin usually has a low continuous working temperature range, which shall not exceed 130 Â° C during most of its service life.

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Organic silicone resin

Although it is not as widely used as epoxy resin and polyurethane resin, organic silicon resin does have some obvious advantages when used as packaging resin, because cured products have high flexibility, excellent chemical resistance, dust and moisture resistance, and good electrical insulation performance in certain temperature range. Organic silicon resin is often more expensive than epoxy resin or polyurethane, but it is very suitable for occasions requiring higher continuous working temperature (above 180 Â° C). In addition, the exothermic temperature of the silicone system is really very low, which ensures the compatibility with the thermal sensor.