Talk Composites - The Forum for Advanced Composites

Pinhole filling

http://www.talkcomposites.com/Topic4422.aspx

By carboncactus - 1/22/2013 11:35:39 AM

Hello, new here.

Been making some out of autoclave parts in prepreg, but I'm having problems with pinholes. They are very small. Lacquering and sanding time and time again doesn't seem to work. I believe they must be filled. Looking around the web, most products made specifically for the job seem to be American. Does anyone know how to do this efficiently? Needs to be cheap, quick and easy. It will need to be lacquered afterwards for UV protection.

Thanks
By carboncactus - 5/16/2013 12:31:15 AM

Sorry for digging up an old thread.
This is OOA prepreg, Matthew, the pinholes are microscopic and evenly distributed throughout the whole part.
There is nothing "going wrong", it's the nature of the prepreg. The only way it comes out with less pinholes is to have a perfect bag, perfect dwell, perfect ramp, vacuum on the whole day. Even then there will still be pinholes.