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Carbon wave mutant

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chrislandy
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Re: Carbon wave mutant

Postby chrislandy » Mon Jul 07, 2014 12:36 pm

downunder wrote:paint the top.


Why do you think gliders etc are painted white? to reflect the sun / reduce heat absorption.

It does obviously depend on the resin used, the a-typical epoxy you get online or from the local composites store will have a low Tg, sometimes as low as 60deg C but with proper post cure and resin selection you get get the Tg over 130deg C. You can also get some resins which you can post cure at 60-80deg C but will inservice post cure and not distort until it reaches a much higher temp.

I use Hunstman 5052 resin system which with an 80deg cure raises the Tg onset to around 110deg but with a 100deg cure can be raised to 130+deg.

Last week in the UK with only a 20deg air temp and blinding sun I had to take the board inside as I couldn't touch it to work on it!

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downunder
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Re: Carbon wave mutant

Postby downunder » Tue Jul 08, 2014 10:21 am

chrislandy wrote:
downunder wrote:paint the top.


Last week in the UK with only a 20deg air temp and blinding sun I had to take the board inside as I couldn't touch it to work on it!



OMG...

Well, to be earnest, I've got the same problem with my helmet and the area is a way less then a board.
It heats up quite quick on the Sun and it's only 1/2 black carbon.

Now I'm thinking to remove the closed cell and somehow place just a Styrofoam or similar foam.

As I understand there are reports about exposed Carbon boards being not durable. Carbon is a heat superconductor, I think.

chrislandy
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Re: Carbon wave mutant

Postby chrislandy » Tue Jul 08, 2014 10:46 am

Insitu post cure ;)

why replace a perfectly good core with one that can't take any heat?

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downunder
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Re: Carbon wave mutant

Postby downunder » Tue Jul 08, 2014 10:59 am

^
A core from the helmet? :wink:

chrislandy
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Re: Carbon wave mutant

Postby chrislandy » Tue Jul 08, 2014 11:04 am

downunder wrote:^
A core from the helmet? :wink:


Where are you planning to use a styrofoam core?

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Re: Carbon wave mutant

Postby downunder » Wed Jul 09, 2014 3:42 am

My helmet.

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Re: Carbon wave mutant

Postby plummet » Wed Jul 09, 2014 7:31 am

Well I just haven't had these heating issues! and ive been using carbon boards for years. none of them are covered in urethane. they are all west system epoxy finish.


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