I have attached a link below to an article on static charges which gives a perspective on the relative risk of static charge from slide sheets.
You will note that this article is an opinion expressed by the company who sells slide sheets .
That being said, anecdotally in 13 years working in this field I have yet to hear of any actual adverse incident relating to a static charge.
The slide sheet types they are referring to is Dragon: Durable nylon ripstop, with a water repellant urethane coating
and the other is Polyester Tafetta with a pigmented silicon coating.
If you want the more detailed report with goes with it please feel free to email me as i am unable to attach it here
Hope this helps