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Can anyone identify this insulating material please?


I believe this is a Polyimide thermal bonding material if that Is right you should be able to search for Polyimide film and find what you are looking for. I have run into this stuff on equipment I was repairing in recent years.
 
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It is the paper type not very good at all for anything. High thermal resistance and gets moldy too.
 
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nomadradio said:
It's a thermal CONDUCTOR.

But an electrical insulator. DuPont's trade name for this stuff is "Kapton".

73
Click to expand...
Yeah I saw what I thought was Kapton but when I enlarged the photo I saw just the paper. This is from the Fish paper website:
  • this hard, wear-resistant cellulosic paper is more heat-resistant than many plastic materials
I take this to mean it will not deform under heat stress.
 
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thanks for the insight guys.

Its super thin and from my rodek car amp for the mosfets.
I seen kapton tape but thats more clear, I dunno but I'm not gonna pay $76 a roll.
I guess TO-247/220 sil-pads will have to do.

This stuff has a cellulose feel and when you flick it, sounds like a cellulose plastic.

A couple got torn and now I got everything on hold to locate a substitute.
 
ya its a real pain in the ass to assemble this.
I think I made the mistake to using thermal paste on both sides and it bound up and I tried to fish it back and ripped it.
Its a nightmare to assemble this all the "plates" and bolts need to be on as you side the board in, they cant be added any other way.

I got a feeling the silpads are gonna slide off too. Its super aggravating.

IMG_3423.JPG IMG_3424.JPG IMG_3425.JPG IMG_3426.JPG IMG_3427.JPG IMG_3428.JPG
 
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357 said:
thanks for the insight guys.

Its super thin and from my rodek car amp for the mosfets.
I seen kapton tape but thats more clear, I dunno but I'm not gonna pay $76 a roll.
I guess TO-247/220 sil-pads will have to do.

This stuff has a cellulose feel and when you flick it, sounds like a cellulose plastic.

A couple got torn and now I got everything on hold to locate a substitute.
Click to expand...
You could use Chromerics thermal pads which are die cut and reinforced with a fiberglass strands. You don't even need grease with those.
 
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Seems to me you could by the sil-pad material in sheets, and cut to the size needed for this kind of job.

Never have tried to buy it that way, so I don't know where you would find it for sale in that form.

Has the advantage that you don't need the messy compound that way.

73
 
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26413d1501375243-rodek-ra2150e-plug-help-100_1150.jpg


When you take those nuts off, you'd think the plates would lift off but they dont.
They lift about a 1/8 inch thats it.
I could try a bit harder with no board and see I gotta clean my mess of white prints all over from when I was just about to lose my marbles.

If someone has strips of this stuff it 30mm x 100mm I'd pay for several in an envelope.
It was my stupidity greasing the heatsink I guess but it'd be nice to replace them anyway they were looking pretty thin in a few spots and now the ripped ones make it a priorty.

**ok turns out ya can finagle them off and on after all.
/frybag
 
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Try a local Appliance store - ask for "Teflon tape" - the stuff they use in Washer (Waster? Spell check that one!) and Dryers for the drum to roller assembly - see if they can sell you a roll of it - it won't be cheap but it can get you thru this...
 
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