Fixing carbon bike wheel brake tract


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Colinwhufc
Colinwhufc
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Hi I purchased some of your 2 part carbon epoxy to fill in the worn brake tract on my carbon wheels, and have realised that it has a low TG because when I brake the epoxy gets too hot and starts to burn away!!!!
Do you sell a epoxy that has a very high TG that comes in black and would be able to take the heat produced when braking.
Thanks

Colin gladstone  
Warren (Staff)
Warren (Staff)
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You would need to us our High Temperature Black Epoxy Skinning Basecoat which goes upto 180C.

You will need to postcure it to get the best HDT.  Ideally if you can measure the temperature your brakes get upto then you can post cure it to that.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
Colinwhufc
Colinwhufc
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What is post curing and how is it done , sorry for sounding thick !!
wozza
wozza
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Colinwhufc (18/03/2014)
What is post curing and how is it done , sorry for sounding thick !!


Post curing is reheating the part after the initial curing process at elevated temperatures. So if the resin is allowed to initially cure at ambient temperature say 20 Degrees C, the part is then placed in an oven or some other heat source and heated to a temperature above what the resin/part will be exposed to in use. So in your case if the temperature developed during braking is say 60 degrees then you need to post cure above that, say 70 degrees to include a safety margin. Hope that makes sense.

Warren

Carbon Copies Ltd
Colinwhufc
Colinwhufc
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Cheers warren . I just have to figure out  where to find a oven big enough for  a pair of  bike  wheels !!
ajb100
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Do you know your target temp? There are ways around needing an oven as such depending on temp. The alternative if to find who on here is local and nab their oven
Colinwhufc
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I suppose the hotter the better. Could I build something myself, if so what temp could I possibly get up to?
wozza
wozza
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Colinwhufc (18/03/2014)
I suppose the hotter the better. Could I build something myself, if so what temp could I possibly get up to?


With the wheels being carbon I assume its a road bike? I may well be wrong but I wouldn't of thought the temps under braking would exceed 70-80 degrees, after all the brake pads are more or less blocks of rubber. So anything above that surely they would start to melt. You could build a box oven out of Kingspan insulation board and fan heaters that would easily achieve 90 plus degrees. Or as suggested ask someone with an oven to post cure them for you.
You could probably achieve 60 degrees by wrapping them in an electric blanket and a quilt, but you would have little control over the temperature and it would be difficult to know exactly what temperature the wheels had reached.

Warren

Carbon Copies Ltd
Colinwhufc
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Nice one warren. Thanks for the advice
How long should I bake it for?
Edited 11 Years Ago by Colinwhufc
wozza
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Colinwhufc (19/03/2014)
Nice one warren. Thanks for the advice


Your welcome. Maybe add where you are located to the post and some kind person may offer to post cure them for you.Wink

Warren

Carbon Copies Ltd
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