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4hv.org :: Forums :: General Science and Electronics
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High temp plasics?

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Ben Solon
Mon Nov 18 2013, 12:02AM Print
Ben Solon Registered Member #3900 Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
Is anyone familiar with machinable plastics(or other materials) that are moisture resistant and have no deformation or loss of rigidity up to 100C? I've looked at fiberglass, but when machined, the swarf(or equivalent) can be nasty to breath in or have floating around. PTFE and HDPE both get a bit soft IME. A ceramic would be ideal, but I don't have the capability to machine it, plus It's not a shock resistant as I might like. Any Ideas?

-Ben
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Billybobjoe
Mon Nov 18 2013, 01:08AM
Billybobjoe Registered Member #396 Joined: Wed Apr 19 2006, 12:55AM
Location: Pittsburgh, PA
Posts: 176
Polycarbonate?

See here: Link2 You can narrow the temperature range on the sidebar. They have about 45 different types rated for >100C. Some are considerably more expensive than others, so if you have any more details about what you're using it for we could help narrow it down.
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Patrick
Mon Nov 18 2013, 02:18AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
have you considered epoxy? perhaps a type that machinable or even cast-able.
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BigBad
Mon Nov 18 2013, 02:28AM
BigBad Registered Member #2529 Joined: Thu Dec 10 2009, 02:43AM
Location:
Posts: 600
Yes, epoxy, and if you want a composite, epoxy reinforced with kevlar might be reasonable
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Thomas W
Mon Nov 18 2013, 11:15AM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Fiberglass could always be machined while you put water/coolent over the tool, meaning that the dust doesnt go anywhere.
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BigBad
Mon Nov 18 2013, 02:21PM
BigBad Registered Member #2529 Joined: Thu Dec 10 2009, 02:43AM
Location:
Posts: 600
Fiberglass isn't that bad to drill anyway. Unlike asbestos it gets cleared from the lungs by the body, partly because the fibre size is controlled during manufacture.
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Kizmo
Mon Nov 18 2013, 02:37PM
Kizmo Registered Member #599 Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
Polyether ether ketone (PEEK) is the ultimate choice for high temperature and strength applications.

And its not too bad to work with either. May be little bit difficult to find but at least i was able to order some from local industrial plastics seller.
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Dr. Dark Current
Mon Nov 18 2013, 03:12PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Nylon, polyimide (Kapton)?
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Patrick
Mon Nov 18 2013, 03:33PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
I'm not sure about the temp on Kydex, but it's strong....
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Tony Matt
Mon Nov 25 2013, 05:06AM
Tony Matt Registered Member #3700 Joined: Sat Feb 19 2011, 12:59PM
Location:
Posts: 107
Epoxi reinforced with fiberglas.

It could be easily moulded, not nescessary machined .
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