Polyester Resins are more brittle compared to Epoxy at the same casting thickness, with higher risk of cracking during motor life. In addition Polyesters contain VOC (as reactive volatile monomers) that we prefer not to use. Epoxy Heat Curing are VOC free.
We give support in prototyping and tools engineering to all our customers interested to develop with us a suitable potting process for their pieces.
High TC normally means high mineral fillers content and consequently an higher final mixed viscosity. A good balance between TC and low viscosity is usually preferred in order to obtain the best impregnation and heat dissipation.
Tg is the change of physical state of polymer: from hard to elastic and it is obviously reversible. High Tg can be desirable only if Mechanical properties have to be maintained at elevated working temperatures. On the opposite an high Tg can cause sometimes more polymer brittleness and risk of thermal (low temperature) or mechanical ( vibration) cracking.
Surely release Agent or a self-releasing mold, as for example our patented mandrel system.
Yes we can supply oven systems together with dispensing equipment, usually when a full automatic dispensing line is required for mass production.
Usually the finalized curing is tested through Tg (Glass Transition Temperature). At process set-up , different polymer samples are taken from different areas to verify the complete and homogeneous curing degree.
No gas or vapors are generated during Resin+Hadener curing. These systems are VOC free.
PU is used when an high thermal resistance is not required (max.130°C) . Respect to Epoxy heat curing , PU have also a lower "wetting" on wires , risking to leave air gaps in encapsulation. PU systems find application in different sectors as Capacitors, PCB, Sensitive electronics encapsulation.
Yes, we have customers producing EV Motors already using our resin systems and equipment and others in homologation.
Our Potting Lab is equipped with several testing equipment, in particular with a machine having 6 different tanks, so able to manage 3 different 2K materials. This solution helps us to be quite fast in sampling and testing, always loading new materials in the compatible tank, avoiding in this way massive cleaning. Consider we are also used to sell this machine configuration to customers’ laboratories.
No, only ceramic materials can work at that temperature.
It depends on motor size and its geometry, we can test different systems ranging from 30 to 125°C as Tg and 0,9 to 1,5 W/m°K as TC. Another important parameter to be considered is the low viscosity of the mixed System at application temperature. Having small size and high energy density a very good resin wetting on wires is really important.
To learn more about resin encapsulation, click the link below: