Dielectric Constant of Vinyl Plastic

[D from BC]

As per
http://en.wikipedia.org/wiki/Dielectric_constant
Teflon in 2.1
Polyethylene is 2.25
FR-4 4.35 - 4.7
Rubber 7

What's the dielectric constant for vinyl?
As in black electrical tape.
Or vinyl graphics film (stickers).


D from BC
British Columbia
Canada

 

[John O'Flaherty]

As per
http://en.wikipedia.org/wiki/Dielectric_constant
Teflon in 2.1
Polyethylene is 2.25
FR-4 4.35 - 4.7
Rubber 7

What's the dielectric constant for vinyl?
As in black electrical tape.
Or vinyl graphics film (stickers).

According to this page, the dielectric constant for PVC varies with
composition from 3-6.

"PVC compounds are moderately good dielectric materials. Depending on
the formulation, the dielectric constant can vary from 3 to 6.
Formulations typically include the PVC resin, plasticizer, stabilizer,
flame retardants, fillers, and specialty additives."

http://www.madisoncable.com/CableDesign2.asp


I guess vinyl is the same as PVC.

 

[JeffM]

What's the dielectric constant for vinyl?
As in black electrical tape.
Or vinyl graphics film (stickers).

I see a wide range.
These 2 say it's like pi--about 3.
http://www.google.com/search?q=cach...C.starts.to.decompose.before.it.melts&strip=1
http://www.google.com/search?q=cach...lectric.constant+poly-vinyl-chloride+&strip=1

This one gives 3 as an upper limit and 1.7 as the low end.
http://www.google.com/search?q=cach...lectric.constant+poly-vinyl-chloride+&strip=1

Got a dart?

 

[D from BC]

According to this page, the dielectric constant for PVC varies with
composition from 3-6.

"PVC compounds are moderately good dielectric materials. Depending on
the formulation, the dielectric constant can vary from 3 to 6.
Formulations typically include the PVC resin, plasticizer, stabilizer,
flame retardants, fillers, and specialty additives."

http://www.madisoncable.com/CableDesign2.asp


I guess vinyl is the same as PVC.

Thanks.. Was a little item where I lost my Google patience.
Must have picked some poor keywords..


D from BC
British Columbia
Canada

 

[Tim Williams]

It's not bad (holds static pretty well, too), horrible loss though.

You might find some typical values on capacitor making sites...I remember
finding tables of K's in relation to Tesla Coil capacitors.

Tim

 

[Paul Probert]

As per
http://en.wikipedia.org/wiki/Dielectric_constant
Teflon in 2.1
Polyethylene is 2.25
FR-4 4.35 - 4.7
Rubber 7

What's the dielectric constant for vinyl?
As in black electrical tape.
Or vinyl graphics film (stickers).


D from BC
British Columbia
Canada

Long ago we used some PVC to make some capacitive voltage dividers, and
found out the dielectric properties were strange. The DC dielectric
constant was somewhere around 7, but above some frequency in the tens of
Hz it dropped and became very lossy. Since then I've come across some
material referring to it as a "polar" dielectric, and now I stay away
from it whenever possible.

Paul Probert

 

[LVMarc]

As per
http://en.wikipedia.org/wiki/Dielectric_constant
Teflon in 2.1
Polyethylene is 2.25
FR-4 4.35 - 4.7
Rubber 7

What's the dielectric constant for vinyl?
As in black electrical tape.
Or vinyl graphics film (stickers).


D from BC
British Columbia
Canada

in lieu of an actual measurement, use 3.0 you'll be closer.

Marc

 

[default]

It's not bad (holds static pretty well, too), horrible loss though.

You might find some typical values on capacitor making sites...I remember
finding tables of K's in relation to Tesla Coil capacitors.

Tim

I noticed that too. Very poor dissipation factor at 100 KHZ - stuff
tends to melt and flow.

 

[Rich Grise]

Thanks.. Was a little item where I lost my Google patience.
Must have picked some poor keywords..

Which composition?
http://www.asiinstruments.com/technical/Dielectric Constants.htm#Section V
from http://www.google.com/search?q=vinyl+dielectric+constant

Cheers!
Rich