Need help selecting a high temp plastic
Need help selecting a high temp plastic
(OP)
I'm working on a new product and need some plastics assistance. I'm looking for a high temp plastic that can withstand having a carbon fiber shaft shoot across it at 350 feet per second or greater. Lots of heat for a few milliseconds, and lots of wear. Properties needed would be high temp resistance (500 F or greater), wear resistance, and of course moldable. So far, I've found RTP 4003 TFE 15. Delrin AF (at 185 F) didnt work, wore out.
Any Ideas?
Also, is there such thing as a wear resistant, high temp, SOFT material?
Thanks for any help.
Sincerely,
Chris
Any Ideas?
Also, is there such thing as a wear resistant, high temp, SOFT material?
Thanks for any help.
Sincerely,
Chris






RE: Need help selecting a high temp plastic
In my experience, no, or at least no better than PTFE. Let me try to read between the lines, to help you make a better material choice: the carbon fiber shaft is the item you are producing or testing or whatever, and having these parts become damaged due to abrasion against the plastic pad would not be a good thing.
If the above is correct, then you WANT the plastic to wear before the shaft does, thus teflon (PTFE) in an unfilled (no glass fibers or mica) grade would be ideal. Make the pad a replaceable item, easy to remove, and stock spares.
RE: Need help selecting a high temp plastic
We have always chose between a hard and wear resistant material which can be pretty loud as you draw the arrow across the rest, or soft and very quiet with the downside of wearing out in very few shots.
I'd love to have a material that was wear resistant, and quiet; but I'll settle for wear resistant.
Thanks again,
Chris
RE: Need help selecting a high temp plastic
Being a engineering plastic it will be expensive to mould of course, but there is always a compromise with these type of problems.
RE: Need help selecting a high temp plastic
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Need help selecting a high temp plastic
RE: Need help selecting a high temp plastic
PEEK has inherent low friction/high wear resistance.
It's also mouldable.
Harry
www.tynevalleyplastics.co.uk
RE: Need help selecting a high temp plastic
Im also looking hard at RTP PPA with 30% glass, PTF and silicone added.
RE: Need help selecting a high temp plastic
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Need help selecting a high temp plastic
You want a hard material that takes high temperature with wear resistance but then you need it to be soft so that it damps sound.
I have some ideas.
Try a two material solution. For example a soft polymer (elastomer) for the bulk of the material so you get sound damping. Then a thin coating of a hard, wear resistant material on top. Perhaps aluminium foil.
Also, try a cheap, easy to mold material and then stick on a thing layer of low friction wear-resistant polymer. For example, you can buy PTFE tape and UHMWPE tape at www.cshyde.com
When I want to find an optimal surface, I buy tapes from them and try them out. It's way cheaper and quicker than molding your part in several different materials.
Chris DeArmitt
"Knowledge has no value except that which can be gained from its application toward some worthwhile end."
Think and Grow Rich - Napoleon Hill
RE: Need help selecting a high temp plastic
PTFE can be compression moulded by a PTFE specialist moulder. The material is relatively expensive and expensive to mould, but it is soft, ductile, extremely low friction and very highly temperature resistant.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Need help selecting a high temp plastic
What do you want to improve this way?
RE: Need help selecting a high temp plastic