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Old May 06, 2014, 05:27 PM
Electric Airplane Junkie
bhchan's Avatar
San Mateo, Ca , USA
Joined Jun 2000
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Help!
Etched Teflon tubing

I am looking for some etched teflon sleeves for carbon pushrod, can anyone suggest a source?

Thanks

Brian, an EAJ
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Old May 06, 2014, 05:32 PM
a.k.a Frank Campbell
Long Beach, CA, USA
Joined Jan 2007
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Quote:
Originally Posted by bhchan View Post
I am looking for some etched teflon sleeves for carbon pushrod, can anyone suggest a source?

Thanks

Brian, an EAJ
http://www.rcbuilder.com/Bulk-Bondab...wire_p_55.html
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Old May 06, 2014, 10:04 PM
Electric Airplane Junkie
bhchan's Avatar
San Mateo, Ca , USA
Joined Jun 2000
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Thanks. They have the 0.02" for steel wires. I am looking for the bigger one so I can use the 0.7mm - 1.0 mm carbon rods.

Brian, an EAJ
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Old May 06, 2014, 10:08 PM
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Try CST Sales... http://www.cstsales.com/pushrod_tube.html
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Old May 07, 2014, 10:43 AM
Yes..ok..maybe..lol.....
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tailboom.com
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Old May 07, 2014, 11:05 AM
Thermal, where art thou?
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The website "tailboom.com" is no longer functional.

You'll have to email Rick Walba directly: rawmr@yahoo.com and request available sizes and prices.

See this thread for making your own etched tubing:

[http://www.rcgroups.com/forums/showthread.php?t=1903224

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Old May 07, 2014, 11:46 AM
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United Kingdom, England, Stratford-upon-Avon
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We sell Teflon (PTFE) tubing, and ship world wide:
http://www.hyperflight.co.uk/product...Teflon%29+Tube

I can give discounts on trade quantities.

Neil.
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Old May 07, 2014, 12:03 PM
Thermal, where art thou?
BavarianCharles's Avatar
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Quote:
Originally Posted by Neil Stainton View Post
We sell Teflon (PTFE) tubing, and ship world wide: http://www.hyperflight.co.uk/product...Teflon%29+Tube

I can give discounts on trade quantities. Neil.
Neil,

thanks for the info, and I'll keep you in mind for future purchases.

Would USA customers have to pay the VAT?

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Old May 07, 2014, 12:16 PM
Electric Airplane Junkie
bhchan's Avatar
San Mateo, Ca , USA
Joined Jun 2000
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Neil,

Is the price on the teflon tubing per meter ?

Brian, an EAJ


Quote:
Originally Posted by Neil Stainton View Post
We sell Teflon (PTFE) tubing, and ship world wide:
http://www.hyperflight.co.uk/product...Teflon%29+Tube

I can give discounts on trade quantities.

Neil.
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Old May 07, 2014, 12:21 PM
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United Kingdom, England, Stratford-upon-Avon
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Quote:
Originally Posted by BavarianCharles View Post
Would USA customers have to pay the VAT?
No. The web site automatically deducts VAT for out of EU sales. (And also for within EU sales for VAT registered EU companies.)

Neil.
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Old May 07, 2014, 12:23 PM
HyperFlight Support
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United Kingdom, England, Stratford-upon-Avon
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Quote:
Originally Posted by bhchan View Post
Is the price on the teflon tubing per meter ?
Yes.
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Old May 07, 2014, 06:15 PM
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---Posted this in the Loctite 770 thread by mistake:

After looking at the MSDS sheets for components, the Loctite 770 is just a cleaner and CA amine accelerator. Basically it is the same stuff as the spray accelerator you buy at the LHS.

If Teflon is really "etched" it means that the carbon-fluorine bond is broken of the Teflon polymer chain and the fluorine atom is replaced by a bonding group. Bonding groups are generally hydroxyl groups or perhaps and amine group. This new side group is what actually bonds to the CA polymer glue and holds everything together. There are two ways to bond, you can either make a chemical bond, or you can disrupt the surface of the plastic polymers (essentially dissolving it) and then when the glue gets in the spaces the glue bonds.

I do not know how Teflon is etched, but generally etching of this type is done using a electric plasma of some sort, or by a dissolved sodium metal. This is done using something like Ozone, or another radical generator that breaks the C-F bond and does the replacement. Both are very bad to handle, VERY bad and HARSH.

If I were going to try to "etch" Teflon, one might try soaking it in hydrogen peroxide that yiou can get in the store. Also, you could soak it in MEKP (MethylethylKetone peroxide), the same stuff used to initiate polyester resin hardening. I am not sure of the if the "black" of etched Teflon is due to the etching process of white Teflon, but that could often be the case with reactions.

Other than that, there is not a lot of things you can chemically do to Teflon, it is very inert, but radical formation is very harsh, a very oxidizing and dangerous thing to do. MEKP can explode but is more stable than hydrogen peroxide when not in water. The etching might leave the surface of the Teflon as radical which then bond to the CA, hence the need to keep the etch Teflon. The Primer is an amine in Heptane (a carrier for the amine to keep it diluted). You could soak the Teflon in heptane that contains the peroxides, then wipe it off.

I am going to have to try this myself. But beware, everything is flammable.

If you still need etched Teflon, I have some on a roll that I have been using, but it is of a limited diameter inside. I normally use 0.025" wire inside and sometimes stretch out the tubing so it fits the wire with little slop.

OK, that's my thoughts.

Chris
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