It might be Kapton tape, although the Kapton I've used was orange-colored. We used to use it on electronic connectors that were being overmolded, to keep the molten plastic from flowing where it wasn't wanted.
Hi,
here's a photo:
Best regards, Spehro Pefhany
Methinks that this is teflon tape, which is hi-temp stuff until it burns and outgasses some nasty stuff. Very slippery stuff. Almost feels oily, and you have to grab it just right to handle it. Trying to recall who makes this kind of tape.... Scotch? Permatex? Permacell?
"Spehro Pefhany" wrote in message news: snipped-for-privacy@4ax.com... | Hi, | | here's a photo: | |
Spehro Pefhany wrote in news: snipped-for-privacy@4ax.com:
I'm not sure what your application is but there is a tape made for masking pcbs for wave soldering called Kapton tape (3M - Scotch 5413 Polyimide Film Tape) It is good for continuous use up to 500 F.
You can find it at DigiKey.
They appear to be polyester tape with silicone adhesive, so nothing new. I suppose they soften along with the polyester powder at the ~400°F cure temperature, but the silicone adhesive keeps them from sticking permanently. I don't think I've seen the translucent green & blue colors before.
Best regards, Spehro Pefhany
Where I worked we used Kapton in vacuum chambers where satellite equipment was being toasted by quartz lamps. It's pretty good stuff. For our applications it not only had to resist heat but also not outgass in vacuum. It's a yellow brown in color though.
Another brand in use at the same facility that's blue like the sample you posted the URL to is sold by this outfit:
I agree that Kapton (polyimide) tape is excellent stuff (aircraft disasters notwithstanding). I'm trying to find something not *quite* as good (but hopefully substantially cheaper).
Lots o' tapes on that site, including some quite unusual ones. Thanks. I don't see anything that's high temperature and that color (though the color is immaterial with polyester).
Best regards, Spehro Pefhany
There are some high temp tapes used in Plasma spray coatings here are a couple of links
This is what I use for powder coating...
Looked like polyimide according to the manufacturer's site.
Do you want to use this as a stencil for anodized aluminium instrument panels?
They are non-specific on the colo[u]rs vs. materials. I think if it's polyimide it's going to be amber, if it's polyester it could be anything.
High temperature electrical insulation.
Best regards, Spehro Pefhany
Hey Speff-
I have a couple rolls of the 3/4" wide Kapton left over from a previous contract. Say the word and I will send them off to Trexon. Free for nothing.
--Winston
That would be mighty good of you. Thanks in advance, and a happy, healthy and prosperous 2005!
Best regards, Spehro Pefhany
Look over the class 1 masking tapes - the 2693 is a good start. There are several to check - and make price cut based on volume of total world market. Maybe the 2380 in class II. (Cheaper by class I bet)
Then searching for powercoat :
3M? Composite Bonding Tape 8905, 10 in x 72 yd, 4 per case [click to enlarge] Clean removing high temperature silicone adhesive and tough non-slivering polyester backing makes this tape a popular choice for powder coat paint masking. 6.6 mil (0.17 mm) total thickness.3M Id : 70-0063-1697-3
The same to you, Speff and all RCM'ers worldwide.
(Tape will be started on its way by tomorrow afternoon.)
--Winston
Thanks, Martin, 3M has a much nicer search engine.
That much Kapton tape would probably run $500 or more (50+ 3/4" rolls minimum order). Polyester should be cheaper.
I've also had trouble getting smallish quantities of such common 3M adhesives as 46xMP (basically just a permanent acrylic adhesive with two backings). Here's the sort of thing..
Best regards, Spehro Pefhany
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