You may feel confused when choose a potting compound for your PCB ,and most common solution for PCB encapsulant is Expoxy , PU and Silicone potting .But what are the difference among them, so Shenzhen Tensan will together with you to find out the difference of each and teach you to be expertise .
First of all , let us learn the advantages of each :
Epoxy：
Good bonding strength
Good insulation performance
Polyurethane:
Bonding strength: Silicone<PU<Epoxy
Good Low temperature resistance
Good insulation performance
Good waterproof
Silicone Rubber
Very good yellowing resistance, even no yellowing
Good Waterproof
Good low or high temperaure resistance
Support repairability: whenever there is a flaw after potting, you can easily open and fix it without damage the product
Good weather resistance
Good electrical performance
Good insulation performance
Second , what are the disadvantages each ?
Epoxy:
Easy yellowing
High hardness: After curing, it becomes hard and lead to mechancial stress which will cause damage on the product
Poor low or high temperature resistance: When put the epoxy resin glue led strip work under the -30℃, it will make the led strip decline its flexible and tender, and easy to damage, which will cause many inconvenient during the led strip light working.
No repairability: After curing it become too hard to open. Impossible to fix any flaw after potting.
Polyurethane:
Poor high temperature resistance
Poor ageing resistance
Easy yellowing
Silicone Rubber:
Bonding strength is not as good as epoxy or pu
Last ,the main application of those three items :
Epoxy:
LED,Transformer,Regulator
Industrial Electronics,Controller
Power Module etc.
Polyurethane:
Suitable for those low heat electronic components, such as transformer, choke coil, converter, electric condenser
coil, inductor, rheostat, and PCB etc.
Silicone Rubber:
Suitable for all kinds of electronic components such as LED, display, photovoltaic materials, diode, semi-conductor, sensor, HIV, ICU etc.
For insulation, damproof, dustproof, waterproof, damping purpose.
So if you look for good waterproof and good characteristics silicone potting compound , Tensan can offer you the solution .For more knowledge, please visit our web at :www.chinatensan.com ,
Or you can write to us : sales@sztensan.com
