Permiativity of overhead transparency sheets (MYLAR)

[boylesg]

For the purposes of this equation:

What is the permativity of mylar?

I can find plenty of references to the dielectric strength of mylar with units of kV etc.

But I can't find in references to permiativity measured in F/sq m.

I am aiming to try my hand at building a multiple layer mylar/aluminium sheet capacitor.

 

[keith1200rs]

The relative permittivity is 3.1 to 3.2

www.rfcafe.com/references/electrical/dielectric-constants-strengths.htm

You need to multiply that by the permittivity of a vacuum.

Keith