What are the classification of electronic potting glue?

What are the classification of electronic potting glue? There are many kinds of electronic potting glue, electronic potting glue, epoxy resin potting glue, silicone potting glue, polyurethane potting glue, LED potting glue.

1. Thermal conductive potting. Thermal conductive potting adhesive (HCY) is a low viscosity flame retardant two-component additive silicone thermal conductive potting adhesive, which can be fixed at room temperature or fixed by heating. The higher the temperature, the faster the reinforcement speed. It is made of thermal conductive material added on the basis of ordinary potting or adhesive silica gel. The products produced by general excellent manufacturers will not produce any by-products in the reinforcement reaction, and can be applied to the surface of PC (poly carbon), PP, ABS, PVC and other materials and metals. Suitable for electronic accessories of heat conduction, insulation, waterproof, flame retardant, flame retardant should reach the UL94-V0 level. Meet the requirements of the EU ROHS directive. The main areas of application are the encapsulation of electronic and electrical components and components, and the encapsulation of similar temperature sensors.

2. Epoxy resin potting glue. According to the EU ROHS standard, the reinforced product has high hardness, smooth surface, good gloss, fixation, insulation, moisture-proof, oil-proof, dust-proof, anti-theft, corrosion-resistant, aging-resistant, and thermal shock-resistant. Used for packaging electronic transformers, AC capacitors, negative ion generators, aquarium pumps, ignition coils, electronic modules, LED modules, etc. It is suitable for the sealing layer of small and medium-sized electronic components, such as automobile, motorcycle igniter, LED drive power supply, sensor, ring transformer, capacitor, trigger, LED waterproof lamp, circuit board confidentiality, insulation, moisture-proof sealing layer.

3. Silicone potting. There are many kinds of silicone potting, and different kinds of silicone potting have great differences in temperature resistance, water resistance, insulation, optics, adhesion to different materials, hardness and so on. Silicone potting adhesive can add some functional fillers to give it electrical, thermal and magnetic properties. The mechanical strength of silicone potting glue is generally poor. It is this characteristic that makes it 'fragile' and easy to maintain. That is, if a component fails, you only need to pry open the potting glue and replace it with a new original Potting glue can continue to be used.

In general, the color of electronic potting can be adjusted as needed. or transparent or opaque or colored. Silicone potting material has excellent impact resistance, electrical, moisture-proof, high and low temperature resistance, aging resistance, etc. Double silicon potting glue is the most common one, divided into condensation type and adding molding. The general condensation type has poor adhesion to components and potting cavities. Volatile low molecular substances will be produced during reinforcement. After reinforcement, there will be obvious shrinkage. The shrinkage added is very small, and the low molecular weight will not be produced during reinforcement. It can be rapidly cured by heating. polyurethane potting adhesive

Polyurethane potting glue, also known as PU potting glue, is usually made up of polyol and polyester, polyether, polyglycol diisocyanate, with diol or diamine as chain extender, through step-by-step polymerization. Potting adhesives can generally be prepared using a prepolymer method and a one-step method. Polyurethane potting materials are characterized by low hardness, moderate strength, good elasticity, water resistance, mildew resistance, impact resistance, transparency, excellent electrical insulation and flame retardancy, no corrosion to electrical components, and good adhesion to metals such as steel, aluminum, copper, tin, rubber, plastic, wood and other materials. The potting material can prevent the electronic components and circuits installed and adjusted from being affected by vibration, corrosion, moisture and dust.

4.LED potting glue. It is an auxiliary material for packaging, with high refractive index and light transmittance, can protect the chip, increase the luminous flux, low viscosity, easy defoaming, suitable for potting molding, so that it has good durability and reliability.