ASIASEAL New Material Technology (Shandong)
Dongguan ASIASEAL New Material Technology
Dongguan ASIASEAL New Material Technology
Chain to Shandong
Yahai website
Chain to Shandong
Yahai website
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Potting is an important application area for polyurethane resins. It has been widely used in the manufacturing of electronic devices and is an indispensable and important insulating material in the electronic industry. Potting is to pour the liquid polyurethane compound into the device equipped with electronic components and circuits by mechanical or manual methods, and solidify it into a thermosetting polymer insulating material with excellent performance under normal temperature or heating conditions. Its functions are: strengthen the integrity of electronic devices, improve the resistance to external shock and vibration; improve the insulation between internal components and lines, which is conducive to the miniaturization and light weight of devices; avoid direct exposure of components and lines, and improve the waterproof of the device. , Moisture resistance. Epoxy encapsulant has a wide range of applications, various technical requirements and a wide variety. There are two types of curing conditions: room temperature curing and heating curing. From the dosage form, it can be divided into two types: two-component and one-component。 Room temperature curing epoxy potting glue is generally two-component, which can be cured without heating after potting. It does not require high equipment and is easy to use. The disadvantage is that the compound has high viscosity, poor impregnation, short pot life, and it is difficult to realize automatic production, and the heat resistance and electrical properties of the cured product are not very high. It is generally used for potting of low-voltage electronic devices or occasions where heating and curing are not suitable. Compared with the two-component heat-curing potting glue, the outstanding advantages are that the required potting equipment is simple, easy to use, and the quality of the potting glue is less dependent on equipment and processes.。 Heat-curing two-component epoxy potting compound is the most widely used variety. Its characteristics are that the compound has low operating viscosity, good manufacturability, long pot life, good impregnation, and excellent comprehensive performance of the cured product. It is suitable for the use of single-component epoxy potting materials in automatic production lines of high-voltage electronic devices. It is a new development in foreign countries. varieties, need to be heated and cured. Room temperature vulcanized silicone rubber or silicone gel is used for potting of electronic and electrical components, which can play the role of moisture-proof, dust-proof, anti-corrosion and shock-proof, and improve the performance and stability parameters. It is liquid before vulcanization, which is easy to pour , easy to use. When using silicone gel for potting, it does not release low molecules, has no stress shrinkage, can be deeply vulcanized, and has no corrosion. The transparent silicone becomes a transparent elastomer after vulcanization, and the components encapsulated in the adhesive layer are clearly visible. Use a needle to pierce the inside to measure the parameters of the components one by one, which is convenient for inspection and repair. There are also opaque gray or black, different colors are used in different ranges. The room temperature vulcanized foamed silicone rubber is used for the magnetic core board of the internal memory of the electronic computer. The flame-resistant potting compound made on the basis of addition type RTV silicone rubber is very effective for the molding of TV high-voltage caps and high-voltage cable sheaths. When it is not necessary to carry out hermetic encapsulation or it is inconvenient to carry out impregnation and potting protection, one-component room temperature vulcanized silicone rubber can be used as the surface coating protection material. Generally, the surface protection coating of electronic components is made of room temperature vulcanized silicone rubber, and the inner coating is carried out with addition-type silicone gel. Glass resin-coated electronic appliances and instrumentation components are widely used. |
