Why should the power supply use the electronic filling and sealing glue? What effect does fill seal glue have?

Electronic sealing glue is liquid before curing, with fluidity. The glue viscosity is different according to the material, performance and production process of the product. The sealing glue can realize its use value after complete curing, after curing can play the role of waterproof and moisture-proof, dustproof, insulation, thermal conductivity, confidentiality, corrosion prevention, temperature resistance and shock prevention.

Why should the power supply use the electronic filling and sealing glue?

 With the development of science and technology, the power supply tends to be intensive and miniaturized, so the stability of the power supply has put forward higher requirements. In order to prevent the damage of moisture, dust and harmful gas to electronic components, slow down vibration, prevent external damage and stable component parameters to minimize external effects, it is necessary to seal power supply, better insulation effect and quality to ensure that the above components are more fixed and not fall off easily, strengthen the integrity of electronic devices, improve the resistance to external shock and vibration, improve the insulation between internal components and lines, miniaturization and lightweight, avoid direct exposure of components and lines, improve the waterproof and moisture-proof performance of devices. Electronic irrigation and sealing glue has been widely used in the electronic device manufacturing industry, the electronic industry is an indispensable and important insulation material, moisture-proof, anti-vibration, explosion-proof (arc).
 
What are the main functions of using electronic sealing glue?
 
1. Waterproof

Irrigation and sealing glue will be the whole product electrical part of the tightly wrapped up, completely isolated from the outside world; what water, water gas, acid and alkali salt can not get to the circuit components, can improve the waterproof, moisture and corrosion resistance. So you choose the glue to be good fluidity, poor liquidity how can deep penetration completely sealed; then the bonding force should also have, otherwise after a long time of cold and cold and component separation is not useful, product life performance is also affected.

2. Heat conductivity

 Power supply is a power product, which is the conversion, control, and external output of energy. Product work will be heat, switch pipe, transformer, electrolytic capacitor, inductor and other which is not a heating device and are afraid of heat device. How to do, must send its heat as soon as possible and as much as possible conduction out.
 So glue must require good thermal conductivity, it can be said that the higher the expected thermal conductivity of glue, the better. The electrolytic capacitance in the power supply, the temperature rises about half the life, but you can not add heat sink to it; transformer, inductor temperature high many parameters in the whole design is difficult, you are not good to add a heat sink to him.
 
 Waterproof power supply needs to be sealed throughout, and the thermal conductivity of the air is very low, mainly by convection and radiation. But convection is impossible, and the components are stuck in the box.

Therefore, the glue with good thermal conductivity can be equivalent to putting each element outside to dissipate heat, not only improve the life and simplify the design.

3. Insulation strength

Basically all of the glue is not conductive, but be aware that AB glue like epoxy may not be a little partially conductive. And in order to save in the inside mixed with sand, it is hard to say. First, has your sand been processed by dehydration treatment, and it also means whether your sand has some other elements to interfere with the curing; whether the ratio of the AB agent is reasonable, whether the mix is sufficient and uniform, and whether all other conditions are available.
 
4. Environmental requirements

Generally, they have been certified. It depends on whether the product and certification is consistent, environmental protection and not environmental protection material price difference or a lot of.
 
5. Fire retardant requirements

Generally, it depends on the flame retardant test in the UL. General requirements of 94-V0 or above.
 Generally, epoxy resin is used for sealing, and the functions are:
1. Seal and fill the gaps to prevent dust and moisture from entering.
2. Fixed xation, Ryukyu gap, do not shake or move.
3. Insulation, increase the insulation strength between electrical facilities, prevent fire, discharge, leakage, etc.