EPOXY AND PU RESINS FOR POTTING AND ENCAPSULATION OF PCBA.
Epoxy and polyurethane resins are excellent insulators against aggressive environments and contribute to the mechanical protection of the PCBs.
Epoxy resins and polyurethane are used for protection in thickness. These systems generally two liquid component when mixed climb quickly in viscosity until fully cured. They are designed to protect and insulate the printed circuit board components against harsh environments : moisture, vibration, mechanical and thermal shocks. The resins offer a total protection of the printed circuit and allow through the deposited thickness of the subset to work completely immersed in water, solvent, gas
- Domestic Electrical
More flexible and less stress on components PCB during curing. They cure more quickly and are more resistant to abrasion.
Temperature resistance higher compare to polyurethane resins. They are generally harder and offer better adhesion and excellent resistance to chemical environments.
HOW TO CHOOSE A RESIN?
To choose the most appropriate resin, it is important to clearly define your needs:
- Repairability y/n
- Electrical Characteristics
- Method of application
- Operating temperature
|Mix in weight||100 : 93||100 : 27||100 : 16||100 : 16||100 : 45||100 : 9||100 : 100|
|Dielectric strength (KV/mm)||20||14||25||0.7||15||20||15|
|Pot life (mn)||15||20||15-20||60||90-120||30-40||6|
|Gel time (mn)||30||30||30||–||40||50-90||10|
|Thermal conductivity||< 0.21||0.2||0.7||–||–||0.75||–|
|Qualification||NON||NON||UL94V0 (6mm)||NON||NON||UL94VO (4mm)||NON|
|Technical data sheet||U19-11||U42-91||U69-42||U6000 Free||ST1611A||ST21A||ST1626|