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I'm considering using anti-static polyethylene foam sheets cut to fit in a case I have for my RF test gear. My thinking is that polyethylene is more stable than the other foams out there.
2 sources I have are Granger & McMaster-Carr Anyone have any thoughts?

On 6/27/21 12:13 PM, Bill Higdon via groups.io wrote:

I'm considering using anti-static polyethylene foam sheets cut to fit in a case I have for my RF test gear. My thinking is that polyethylene is more stable than the other foams out there.
2 sources I have are Granger & McMaster-Carr Anyone have any thoughts?

What we do at JPL is use conventional foam, and cover it with antistatic film (like the stuff they use for ESD bags - the silvery stuff, not the pink stuff. The pink stuff sheds particles), taping it with ESD safe tape.? This has the added benefit that if the foam gets gunky, or sheds particles, they're "inside" the plastic wrapper.

On Sun, Jun 27, 2021 at 12:27 PM, Jim Lux wrote:

What we do at JPL is use conventional foam, and cover it with antistatic
film (like the stuff they use for ESD bags - the silvery stuff, not the
pink stuff. The pink stuff sheds particles), taping it with ESD safe
tape.? This has the added benefit that if the foam gets gunky, or sheds
particles, they're "inside" the plastic wrapper.

Clever idea...

Roger

I added a strap of anti static foam between the bottom and top after the I took the attached pic.

I might use one of the anti static envelopes I have as an added feature. I can see for what JPL is involved with any particle shedding causing issues. But with my experience with the pink foam in other applications it didn't cause any problems.

On 6/28/21 12:07 PM, Bill Higdon via groups.io wrote:

I might use one of the anti static envelopes I have as an added feature. I can see for what JPL is involved with any particle shedding causing issues. But with my experience with the pink foam in other applications it didn't cause any problems.

Just in case, it's not a concern about "space hardware" per se, it's the particles and coating from the sheet material the pink poly bags are made from getting into the electronics and causing "mystery not quite shorts".


The containment of "foam falling apart" is just gravy.