*


All times are UTC + 1 hour



Post new topic Reply to topic
 [ 37 posts ]  Go to page Previous  1, 2, 3, 4
Author Message
 Post subject: Re: Carbon wave mutant
PostPosted: Mon Jul 07, 2014 12:36 pm 
Offline
Rare Poster

Joined: Wed Apr 02, 2014 6:48 pm
Posts: 25
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!


Top
Profile
 Post subject: Re: Carbon wave mutant
PostPosted: Tue Jul 08, 2014 10:21 am 
Offline
Frequent Poster
User avatar

Joined: Mon Jul 01, 2013 7:16 am
Posts: 295
Location: Perth, Australia
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.


Top
Profile
 Post subject: Re: Carbon wave mutant
PostPosted: Tue Jul 08, 2014 10:46 am 
Offline
Rare Poster

Joined: Wed Apr 02, 2014 6:48 pm
Posts: 25
Insitu post cure ;)

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


Top
Profile
 Post subject: Re: Carbon wave mutant
PostPosted: Tue Jul 08, 2014 10:59 am 
Offline
Frequent Poster
User avatar

Joined: Mon Jul 01, 2013 7:16 am
Posts: 295
Location: Perth, Australia
^
A core from the helmet? :wink:


Top
Profile
 Post subject: Re: Carbon wave mutant
PostPosted: Tue Jul 08, 2014 11:04 am 
Offline
Rare Poster

Joined: Wed Apr 02, 2014 6:48 pm
Posts: 25
downunder wrote:
^
A core from the helmet? :wink:


Where are you planning to use a styrofoam core?


Top
Profile
 Post subject: Re: Carbon wave mutant
PostPosted: Wed Jul 09, 2014 3:42 am 
Offline
Frequent Poster
User avatar

Joined: Mon Jul 01, 2013 7:16 am
Posts: 295
Location: Perth, Australia
My helmet.


Top
Profile
 Post subject: Re: Carbon wave mutant
PostPosted: Wed Jul 09, 2014 7:31 am 
Offline
Very Frequent Poster

Joined: Sat Aug 29, 2009 11:25 pm
Posts: 2512
Location: The Naki
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.


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic
 [ 37 posts ]  Go to page Previous  1, 2, 3, 4

All times are UTC + 1 hour


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group