Talk Composites - The Forum for Advanced Composites

Carbon fiber skinning (Help needed)

http://www.talkcomposites.com/Topic18137.aspx

By Fraser.Booth - 6/11/2015 6:28:28 PM

Okay so I'm having a couple of issues when skinning my parts. the first issue that i had is that I'm getting clusters of bubbles on the part but they are not carrying across the whole part. I am mixing my resin and allowing to 5 mins to de-gass i then cover the part with minimal resin and then go across the surface with a heat gun to try and eliminate any surface bubbles. 

The next issue that i am having but haven't got any pictures of it... I am finding that the carbon fiber is lifting when i am applying my first coat of resin. I have tried using a little amount of resin and i have tried using a large amount but in both cases the carbon fiber lifts as if it has a bubble underneath it. I have tried pushing it back down but it doesn't seam to want to stick to the part it just lifts back up. I have tried using the 'fusion fix GP spray adhesive' and i have also tried using the black skinning epoxy base coat, both with the same results. I don't know if this makes a difference but it isn't the whole surface that lifts its usually where a flat edge starts to meet a corner the flat edge will lift slightly (isn't bridging because its the outside of a corner not the inside) and it doesn't always do it in the same spot. 

Any help would be more than appreciated, thanks in advance Smile 
By Dravis - 6/14/2015 10:37:59 PM

certainly, if you do like I did a few times, and go a bit early with the CF on the "tto tacky" base-coat, and THEN add the coating epoxy  too early, the the whole thing starts "sliding" apart ... messy .. and NOT very pretty---Crying

I make sure to hit the exact right time for the base-coat "tackyness" lay on the CF... and then I wait until I'm sure that the follow up epoxy coats will not soften up the base coat ... BigGrin