Abstract: At present, there are a variety of potting gels on the market. The performances shown are different because of their different materials. According to their different properties, the scope of application of the gel is also different. Among them, three types that people mostly use are the following: potting epoxy resin gel, potting silicone gel and potting polyurethane gel.
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At present, there are a variety of potting gels on the market. The performances shown are different because of their different materials. According to their different properties, the scope of application of the gel is also different. Among them, three types that people mostly use are the following: potting epoxy resin gel, potting silicone gel and potting polyurethane gel. Their respective advantages and disadvantages are as follows:
Potting epoxy resin gel: it has small shrinkage, no by-products, excellent electrical insulation properties and bonding ability. However, due to the limitation of its own molecular structure, its cold and heat resistance is poor, and it is easy to crack after cold and heat cycles, which affects the moisture resistance of electronic components. And it is fragile after curing, weak in impact resistance, and easy to damage electronic components. So, it is only suitable for potting under normal temperature conditions and no special requirements on environmental mechanical properties.
Potting polyurethane gel: it has strong environmental adaptability with a certain bonding performance and thermal insulation ability. However, it is more troublesome to operate because the surface of the polyurethane material is too soft, easy to foam, insufficient curing or brittle after high temperature curing. After curing, the surface of the colloid is not smooth and poor toughness, the anti-aging ability and anti-vibration ultraviolet is very weak, and the colloid is easy to change color. It&#;s only suitable for common electrical components.
Potting silicone gel: It has excellent high and low temperature resistance, is stable generally from -60 &#; to 200 &#; and has excellent electrical performance and insulation ability. It can be widely applied to various electronic components, which effectively improves insulation between the internal components and circuits, guarantees the stability of the use of electronic components, and can also play the role of thermal conductivity and flame retardant, waterproof and shockproof, but unfortunately the adhesion is poor.
As a company that provides high-quality potting silicone gel for different users across the country, the gel developed by us has excellent thermal conductivity and flame retardant, which can effectively improve the heat dissipation capacity and safety of electronic components to ensure the reliability of electronic components.
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