It looks to me like you have bought kaptpon based insulation. Its characteristics look fine for most semiconductor applications.. I don't see anything that would make this more or less applicable in large or small amplifiers other than the match to the actual devices you seek to insulate and get heat away from.
It appears that it will but I'd test with the amp driven hard then disassembling to see if it survived.
The Kapton MT is expensive but still a better deal than this. The cheap Kapton HN on a roll at ebay (or wherever) is good enough for most applications.
The Kapton MT is expensive but still a better deal than this. The cheap Kapton HN on a roll at ebay (or wherever) is good enough for most applications.
How would it fail?
Kapton has excellent thermal and electrical properties.
Yes, its resistance to shear and cutting is very low, but as an insulator it would only see this in installation.
I do assume that your application has reasonable mounting arrangements to maintain pressure on the output devices to the heatsink.
If you need to cut this or punch holes in it, be careful not to tear that kapton
Kapton has excellent thermal and electrical properties.
Yes, its resistance to shear and cutting is very low, but as an insulator it would only see this in installation.
I do assume that your application has reasonable mounting arrangements to maintain pressure on the output devices to the heatsink.
If you need to cut this or punch holes in it, be careful not to tear that kapton
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I don't know how the coating will behave. The Kapton core will be OK.
Also, 4.5 mils is thicker than most. How well will it transfer heat compared to the 2.5 mil (1mil Kapton and 1.5mils of adhesive) material?
Also, 4.5 mils is thicker than most. How well will it transfer heat compared to the 2.5 mil (1mil Kapton and 1.5mils of adhesive) material?
The kapton have less properties that a canvas-silicon pad.
I've always thought the kapton for to reject warm, don't to transfer.
Is it wrong? 😕
I've always thought the kapton for to reject warm, don't to transfer.
Is it wrong? 😕
There are a lot of variables.
There are at least two types of Kapton, HN and MT. HN is the cheap stuff you find on ebay. MT is the type used on SoundStream amps. The MT is a better conductor of heat.
Then there's the adhesive (if it has one). The adhesive probably isn't very conductive, so, the clamping pressure (which can displace some of the adhesive), likely comes into play with the Kapton.
Clamping pressure most certainly comes into play with the fiberglass reinforced silicon material. It's performance gets better with greater clamping force.
There are at least two types of Kapton, HN and MT. HN is the cheap stuff you find on ebay. MT is the type used on SoundStream amps. The MT is a better conductor of heat.
Then there's the adhesive (if it has one). The adhesive probably isn't very conductive, so, the clamping pressure (which can displace some of the adhesive), likely comes into play with the Kapton.
Clamping pressure most certainly comes into play with the fiberglass reinforced silicon material. It's performance gets better with greater clamping force.
I'm giving Keratherm 86/82 a try next week on some of the pre-MEHSA Fosgate amps. At least the thermal conductivity is much higher than Kapton films. Amazon was the best place I could find it in a size I wanted - 210x148x0.25mm, $24. Not cheap, but should do a few amps, and I couldn't find it anywhere else cheaper, stateside.
https://www.amazon.com/gp/product/B08KQJWRZQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
They also have another line available for a little less money, but not as large of sheets:
https://www.amazon.com/gp/product/B08G9NK33H/ref=ox_sc_saved_title_2?smid=A375TAHLN0VA3P&psc=1
https://www.amazon.com/gp/product/B08KQJWRZQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
They also have another line available for a little less money, but not as large of sheets:
https://www.amazon.com/gp/product/B08G9NK33H/ref=ox_sc_saved_title_2?smid=A375TAHLN0VA3P&psc=1