Teflon film & copper foil

[merlin el mago]

I want to make my own PTFE copper foil capacitors but I need to know how thick have to be the Teflon film & the copper foil for 450V or 600V?

TIA
Felipe

 

[nec3]

Here says its dielectric strength is 285 V/mil at room temperature.
http://catalog.wshampshire.com/Asset/psg_teflon_ptfe.pdf

I am not sure if its relation with thickness is linear.

 

[SY]

Do you have pro grade winding equipment and thermal spray, or are you deliberately trying to make a microphonic and high inductance and ESR part?

 

[Badge]

I don't think this is a project for amateurs. Winding tension, materials and finish are done with machines with tight control over specs. Buy some Russian NOS caps off ebay would be my suggestion.

 

[phase]

I would do a warm-up version using different materials first, maybe make a rig to assist in the process/tension. Maybe aluminum foil and polypropylene or Mylar.
PTFE is pretty soft and tears easy. Imagine trying to layer bubble gum in a spool...
Sounds like a fun challenge, good luck.

 

[SY]

Even with pro equipment, PTFE is difficult to wind well. And then there's the end termination... this will not end well.

 

[merlin el mago]

OK thanks for advice guys I will let it go.