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Old 04-13-2005, 12:53 PM   #1
jond8
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How vast is OT's knowledge???

Anyone had any luck bonding carbon fiber tube to polypropylene rod? And if so, what type of epoxy did you use?

Everyone else should post there engineering questions here too... It will be so awesome!!!



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Old 04-13-2005, 12:54 PM   #2
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I have, but I won't tell how.

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Old 04-13-2005, 01:02 PM   #3
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I have polypropelene underwear. It bonds my rod quite well.
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Old 04-13-2005, 01:03 PM   #4
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Whats the application?
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Old 04-13-2005, 01:08 PM   #5
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Quote:
Originally Posted by Undepelo
Whats the application?
Marine Iridium/GPS antenna mast/base for an autonomous oceanography profiling float.
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Old 04-13-2005, 01:10 PM   #6
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Quote:
Originally Posted by jond8
Marine Iridium/GPS antenna mast/base for an autonomous oceanography profiling float.
In layman's terms, a flag for his rowboat.
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Old 04-13-2005, 01:16 PM   #7
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Quote:
Originally Posted by jond8
Marine Iridium/GPS antenna mast/base for an autonomous oceanography profiling float.
Well wouldn't this info make a hell of a difference?
My guess would be you probably want to look for epoxies for marine applications and do really good surface prep. instead of being to concerned with the bond to the cf/poly combo.
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Old 04-13-2005, 01:19 PM   #8
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Quote:
Originally Posted by Undepelo
Well wouldn't this info make a hell of a difference?
My guess would be you probably want to look for epoxies for marine applications and do really good surface prep. instead of being to concerned with the bond to the cf/poly combo.
Certain plastics can not be bonded to, for example: Delrin and Teflon and (me thinks) Polypro...
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Old 04-13-2005, 01:19 PM   #9
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Ah yes, the MIGPSAMBfaAOPF. I dealt with this exact issue last month. You wanna use JB weld.


Perhaps duct tape.



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Old 04-13-2005, 01:22 PM   #10
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Quote:
Originally Posted by jond8
Certain plastics can not be bonded to, for example: Delrin and Teflon and (me thinks) Polypro...
No chance of a mechanical bond (screws, bolts, clips..bla bla..)?
I'd be worried about the bond in your case without more info/testing if you cant find a specific epoxy/glue for your materials that also has enough bond strength fatigue properties AND is resistant to salt water environment. If your base comes off, the signal will be lost and the equipment lost at sea? Is the bond surface big in proportion to the forces the antenna exerts?
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Old 04-13-2005, 01:25 PM   #11
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Quote:
Originally Posted by Undepelo
No chance of a mechanical bond (screws, bolts, clips..bla bla..)?
God, I wish...

Not in this case. I think I'm just going to spec out ABS and then do some polypro bonding test to see if we can use it at a later date. ABS isn't a tough as polypro though and this base will be seeing some substantial bending moments....
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Old 04-13-2005, 01:50 PM   #12
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Go to mcmaster.com and order up some Scotch Weld DP8005. It should stick quite well. It is designed for polyolefins (Polypropylene, Polyethylene, TPO, etc). You'll need to order the gun, 10:1 ratio piston thing, and a bag of disposable mixing tubes. The stuff works great. We used it on a bunch of things. Good luck

<--- Plastics engineer
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Old 04-13-2005, 02:03 PM   #13
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Quote:
Originally Posted by orbit03
Go to mcmaster.com and order up some Scotch Weld DP8005. It should stick quite well. It is designed for polyolefins (Polypropylene, Polyethylene, TPO, etc). You'll need to order the gun, 10:1 ratio piston thing, and a bag of disposable mixing tubes. The stuff works great. We used it on a bunch of things. Good luck

<--- Plastics engineer
Awesome thanks! I'll give it a shot. Have you had any experience bonding polyolefins with Loctite 380? This was recommended by a peer...
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Old 04-13-2005, 02:22 PM   #14
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Haven't tried the Loctite. I have to say that with any of these, you should test the bond (if possible). Also, try to rough up the surfaces a bit, this will help a lot (you know, that old maximizing the surface area thing). Also, make sure the surfaces are CLEAN. Isopropyl alcohol is a good, (relatively) safe solvent. Just remember that surface prep is everything in bonding. Good luck!
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