Do you have any system with polyester resin?

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.

Do you support prototyping services in terms of vpi? let’s say that quantity is less than 3 units

We give support in prototyping and tools engineering to all our customers interested to develop with us a suitable potting process for their pieces.

How can high TC impact on other resin properties?

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.

What happens at the TG point? Is it a high TG desirable?

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.

What is better? Release agent or a coating that has a low free surface energy?

Surely release Agent or a self-releasing mold, as for example our patented mandrel system.

Do you also have oven solutions?

Yes we can supply oven systems together with dispensing equipment, usually when a full automatic dispensing line is required for mass production.

How do you ensure a fully cured resin during setup and during 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.

Does Resin and Hardener reaction, generates its own gas?

No gas or vapors are generated during Resin+Hadener curing. These systems are VOC free.

Can you say why epoxy is used in some cases and PU in others

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.

Are you already delivering epoxy resin solutions for existing EV/HEV Motors in the markt?

Yes, we have customers producing EV Motors already using our resin systems and equipment and others in homologation.

In your potting lab, how do you test with different resin types please? do you have to clean potting machines while changing the resin types?

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.

We manufacture ESP motors for gas and oil industries. currently we are developing a high temp motor, Operating temperature around 350 deg C. Do you have any potting compound could work in this high temp?

No, only ceramic materials can work at that temperature.

13)Which material system you would propose to an application that has the following requirements: -20°C to 180°C; No mechanical load on the resin itself; The target is the best possible temperature dissipation from the windings towards the stator iron package. This motor has high energy density, low vibration.

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.

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