Electrostatic Air Purifier Does Air Travelling Via A Simple Fan Through An Electrostatic Filter (like Filtrete) Get Ionized?

Does air travelling via a simple fan through an electrostatic filter (like Filtrete) get ionized? - electrostatic air purifier

Only to an earlier question that I heard that ionized air can be potentially dangerous to clarify (), for example, free radicals, so they want to avoid air filter to ionize the air. The 3M Filtrete electrostatic filters are based on polyolefins, (very common in the furnace filter, and now as part of an independent air purifier) are pre-loaded with a static charge against dirt, dust and wear particles from the incoming air.

My question is, how non-irradiated (normal) air moves through the filter (via a simple fan, ionizer is involved) there is no way I can be a load of electrostatic filters, or in the air can slightly ionized in any way or form after it leaves the filter? Now that I know the air is not cost much, so I do not think it would be, but I want an opinion.