Talk Composites - The Forum for Advanced Composites

Carbon fibre skinning problem

http://www.talkcomposites.com/Topic30538.aspx

By Hayward - 9/27/2018 10:37:49 AM

Hi I have recently made a carbon fibre skinned fuel flap with the xcr resin. Once finished it was perfect sprayed with clear coat fine sanded and polished. It's been in the workshop for about two weeks no problem I send it out and two days on the car the carbon fibre texture has come through. Its like when I started with just a few layers on really need some help with this. 
By Hayward - 9/28/2018 7:39:20 AM

 
Lester Populaire - 9/28/2018 6:46:34 AM
 
Hayward - 9/27/2018 10:17:04 PM
 
Lester Populaire - 9/27/2018 3:48:36 PM
Did you post cure it in an oven? I'm guessing the glass transition temperature was too low and the black part got too hot in the sun.

Yes I think you are right I have found out I need to post cure at 60c for 8 hours. And hopefully won't have this problem again 

While we're at it - in case you didn't varnish it I would highly recommend you doing this as well to protect the part from UV

And I more thing if I leave it for 8hour in room temperature post cure would I need it in the oven for 8hours after that.