Ohms and static electricity grounding

[gildasd]

Hello,

I'm currently temp-working for a firm that makes plastic extrusions. Mostly high end cable guides and the such.
What intrigues me is that certain synthetic rubber covered profiles (sound dampening) apparently pick up dust via static build up.
The dust that is not large fragments of plastic but of very fine "charcoal" appearance that is probably dragged through (dust is sucked off in two stages and the actual extrusion takes place in water, so there is very little airborne plastic dust).

This morning I raised some eyebrows as I came early to measure continuity of different parts the machines.
Overall, it seems pretty good as each entire process in mounted on two steel rails.
However, I did measure resistance between the "trap door" trays that receive the finished profiles and the packing surface below it (50cm drop).
This resistance varies from 25 Ohms 450 Ohms depending on the machines.

A what level of resistance will the static buildup be affected?
Must i measure something else?

Thanks!

(disclaimer, I'm only working there two more days as a student job, I have no interest other than my general electrical culture)

[tautech]

I wouldn't think that little would be a problem, though if they are both powered machines there might be an earthing problem.
Resistance above true ground would be my concern, not just for static discharge, for electrical safety also.

[Rerouter]

as there is a water bath nearby, the plastic dust has likely picked up some dirty water with minerals / other process stuff which after evaporating increase the conductivity of the plastic making it a very crude resistor,

what is actually holding the plastic powder to the (synthetic rubber if i read right) trap door would need to only be the tiniest trace of oil, from there plastic will happily cling to plastic,

[gildasd]

The water is distilled, filtered and replaced in a continuous loop... In fact the profile is rectified 2 to 3 times submerged before being "strained"...

It the water had any dust, the profiles would be scratched and would go straight to recycling ( done partly in house - another story).
There is no oil anywhere as it could affect the "pulling" part of the machine and make the day very miserable!!!

Every electrical motor and transformer is connected directly to the grounding in the general supply 380/420V system.

All the structural and mechanical parts are all connected to two rails and grounded separately.
(As per EU regulations)