Extreme lt. wt. non conductive materials

[pablo222]

I am looking for extreme light weight electrically non conductive materials which also has some thermal resistance as well.
I am building a High voltage generator of 250,000+ volts at 50ma
I am needing to shield the applicational machinery and computers where I have very low weight bearing ability over the machery structure do to design and mobility issues.
I have been out of the loop concerning the advancement of non conductive materials. Therefore I am asking those here if they can give a list of what they know which will fit this requirement.
The material must be either flexable but strong or be able to be molded into required shapes.
I have rejected fiberglass as being too heavy.
Any Suggestions?

pablo222

 

[brewnog]

Sorry, why does it have to be light weight?

 

[pablo222]

It just has to be. Brass is way way to heavy.

The application is a trade issue and can not be disclosed. However, I am looking for light weight non conductive materials.

But think of it this way. Even space vehicles have weight limits. Though this application has nothing to do with the areospace industry, the lighter this can be made the better. Like all products from most industries lighter and/ or cheaper is the way things are.

Thus I am looking for lighter. This application has been built with fiberglass. But it needs to be lighter. How much lighter is the key. There are products which are lighter but may be too expensive. However, new products are created every year. Thus reason I am asking here and to several material industrial supply companies. But Material suppliers do not always tell you what you want to know. Their goal is to sell you what they have in their stock not necessarily what is best for the project.

pablo222

 

[chemisttree]

You might look into expanded closed cell foams of polypropylene or polyethylene.