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Introduction of electronic adhesive-silicone sealants and silicone potting adhesive!
Shanghai jiuying new material
Shanghai jiuying new material
Committed to becoming a professional special chemical service provider.
There are many kinds of adhesives, which are used in all aspects of life and bring a lot of convenience to work and life. The following small series introduces one of the application adhesives-electronic adhesive!
What is electronic glue?
Electronic glue is a broad term, which is mainly used for bonding, sealing, potting and coating protection of electronic components.
The main representatives of electronic glue are silicone sealants and silicone potting glue.
Room temperature vulcanized silicone rubber or silica gel can be used to encapsulate electronic and electrical components, which has the functions of moisture-proof, dust-proof, anti-corrosion and shock-proof, and improves performance and stability parameters. Moreover, it is liquid before vulcanization, which is convenient for filling and using.
When silica gel is used for potting, it does not release low molecules, has no stress shrinkage, can be deeply vulcanized and has no corrosion. After vulcanization, it becomes a transparent elastomer, and the components encapsulated in the adhesive layer can be clearly seen, and the parameters of the components can be measured one by one with a needle, which is convenient for detection and maintenance. The magnetic core plate of the memory in the electronic computer is made of foamed silicone rubber vulcanized at room temperature, which meets the requirements after many tests such as vibration, impact and alternating cold and hot.
The flame retardant potting compound made on the basis of adding room temperature vulcanized silicone rubber is very effective for the molding of TV high-voltage cap and high-voltage cable sheath. One-component room temperature vulcanized silicone rubber can be used as surface coating protection material when closed packaging is not needed or it is not convenient for impregnation and potting protection. Generally, the surface protective coating of electronic components is room temperature vulcanized silicone rubber, and the inner coating is addition silicone rubber.
In recent years, electronic appliances and instrument components coated with glass resin have been widely used.
Classification of electronic glue
Silicone sealant
Silicone sealants is a one-component, non-flowing paste dealcoholized room temperature vulcanized silicone rubber. Through the condensation reaction of water in the air, low molecules are released to cause cross-linking and curing, and vulcanized into high-performance elastomers. It has excellent cold-hot alternation resistance, aging resistance and electrical insulation. It has excellent insulation, moisture resistance, earthquake resistance, corona resistance, electric leakage resistance and chemical medium resistance, and can be used continuously at -60 ~ ~ 200℃ and maintain its performance. It can seal and bond electronic components without polluting the surrounding environment, which fully meets the requirements of ROHS directive of the European Union.
use
This product is suitable for all kinds of structural adhesive seals in industrial production.
Structural bonding of steel plates in automobile compartments:
Insulation, bonding and sealing of high-voltage components such as TV, power supply, CRT picture tube and DY deflection coil;
Fixing and bonding of PCB sensitive components, capacitors and triodes;
Bonding and sealing of refrigerators, microwave ovens, induction cookers, circuit boards, electronic components and solar energy fields;
Moisture-proof and waterproof packaging of exquisite electronic accessories; Car headlights gasket seal;
Bonding, sealing and strengthening of wear-resistant ceramic sheet and window frame mounting glass in power plant pipeline;
Elastic bonding of most metal and nonmetal materials, especially in the environment with special temperature requirements;
Silicone potting compound
Silicone sealant is a one-component, low-viscosity, dealcoholized room-temperature curing silicone sealant with high temperature. Through the condensation reaction of water in the air, low molecules are released to cause cross-linking and curing, and vulcanized into high-performance elastomers. It has excellent resistance to cold and heat changes, stress changes and other properties, high and low temperature resistance, long-term elastic stability at high temperature, ultraviolet resistance and aging resistance. And has excellent insulation, moisture-proof, earthquake resistance, corona resistance, electric leakage resistance and chemical medium resistance. It can seal and bond electronic components without polluting the surrounding environment, which fully meets the requirements of ROHS directive of the European Union.
use
This product is suitable for bonding and potting of various structures in industrial production.
Power supply, LED module potting; Photoelectric displays, electronic components, electrical modules, semiconductor equipment and circuit boards are waterproof and moisture-proof; Coating the outer surface of the bulb, etc. Thin-layer packaging insulation protection; Moisture-proof, waterproof packaging, insulation and coating protection of various circuit boards of exquisite electronic accessories; Waterproof coating for electrical and communication equipment; Waterproof packaging of LED, display module and pixel; Elastic adhesion to metal and nonmetal materials; Potting of various optical instruments, chemical equipment, mirrors, electrical equipment, small household appliances, etc. Waterproof and shockproof bonding of underwater instruments; Elastic bonding and packaging of various electronic and electrical sensors; Ordinary small layer or thin layer encapsulation.
explain
1, clean the surface
Clean the surface of adhered or coated objects to remove rust, dust and oil stains.
2. Rubber compound
Unscrew (or cut off) the rubber hose cover, squeeze the glue onto the cleaned surface to make it evenly distributed, and then close and fix the adhesive surface.
3, curing
Put the bonded or sealed parts in the air and let them cure naturally. The curing process is from the surface to the inside. If the glue will cure to a depth of 2~4mm within 24 hours (room temperature, relative humidity 55%), if the sizing position is deep, especially where it is not easy to contact with air, the time for complete curing will be prolonged. If the temperature is low, the curing time will also be prolonged. It takes more than 7 days for the 6mm thick sealant to completely cure.
4. storage; stock
Unused glue should be tightened and sealed immediately. When it is used again, if there is a little crust at the seal, it can be removed without affecting normal use. During storage, a small amount of glue may solidify at the nozzle, and it can be used normally after being removed without affecting the product performance.
The above is the introduction of the classification and use of electronic glue introduced by Bian Xiao. For more information about glue, please consult us directly!
Edited on July 25th, 2022. The copyright belongs to the author.
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