电源组件用灌封胶灌封的必要性分析，了解为什么要灌封？

       随着行业的迅速发展，客户对产品各方面的性能都在不断地完善。比如安全性能，使用寿命等这些来作为自己品牌的追求，来提升品牌的竞争力。

电源组件长年处在高温、高湿、高盐雾的严酷环境下，这导致大气中的有害离子加速了对电路板的腐蚀过程。为防止潮湿、霉菌、盐雾对电路的腐蚀，有效避免导线间爬电、击穿现象的发生，仅仅依靠涂覆三防涂料进行防护，是远远不能满足防护要求的。这是因为三防涂料所形成的涂层很薄，通常在20m~200m，不能提供一个很高的抗机械冲击和抗潮气穿透能力。而使用灌封胶的灌封工艺技术，能够极大地提高电子产品在恶劣环境下工作的可靠性、防护性机抗震性能。

        灌封胶使用的工艺技术是采用固体介质未固化前，先排除空气，在填充到元器件的周围，以达到加固和提高抗点强度的作用。例如，为防止湿气、凝露、盐雾对电路的腐蚀，户外工作、舰船舱外、家用洗衣机及洗碗机的电路板等需要进行灌封； 为提高海上工作的电子设备的三防性能，所有的变压器、阻流圈需裹覆、包封、封端；为提高机载、航天电子设备的抗振能力，对某些电路板需进行整体固体封装或局部加固封装；为防止焊点腐蚀或折断，对某些电缆插头座进行灌封。

        在电子工业中，常用的灌封材料有环氧树脂、聚氨酯和有机硅灌封胶。其中又以有环氧树脂灌封胶及有机硅灌封胶最为常用。

        灌封胶的导热系数、颜色、耐高低温、固化时间、操作时间等这些都可以根据客户的需求来定制，绝缘性能好，且不见底灌封主体材料的绝缘强度和防护性，与主体能良好地侵润、工艺性非常好。灌封胶为大型电器原件的安全性及使用寿命等性能加一道保护锁。电源组件用灌封胶灌封是很有必要的。

With the rapid development of the industry, the performance of customers in all aspects of the products is constantly improving. For example, safety performance, service life and so on, these are the pursuit of their own brands to improve the competitiveness of the brand.

The power supply module is in the harsh environment of high temperature, high humidity and high salt fog for a long time, which causes the harmful ions in the atmosphere to accelerate the corrosion process of the circuit board. In order to prevent the corrosion of the circuit caused by humidity, mould and salt fog, and effectively avoid the phenomenon of creepage and breakdown between wires, it is far from satisfying the protection requirements to protect the circuit by coating three anti-corrosion coating. This is because the coating formed by the three anti-corrosion coating is very thin, usually in the range of 20-200m, which can not provide a high resistance to mechanical impact and moisture penetration. The technology of filling and sealing with sealing glue can greatly improve the reliability and seismic performance of protective machine in the harsh environment of electronic products.