After I cut my carbon fiber or fiberglass fabric and I weighed, how many resin in percentage I need to use with wet lay up?
typically same weight as your fabric. mix some more though cause it will get wasted on brushes and the cup…
Wet lay up tends to need more resin to reinforcements.
I try to make a carbon fiber flat plate with 300gr/mq twill fabric and epoxy resin, wet lay up and vacuum.
I mixed about 90% of resin in percentage of fabric weight but when I start a vacuum I can see very very much resin captured by breather fabric, even some resin going into vacuum tube and the vacuum hole valve it’s partially closed from resin.
What wrong?
aim for around 35% resin content for the total weight when finished. to prevent resin getting to your resin trap use a heavier breather. if you find excessively dry laminates then you can use 2x layers or breather film, or a finer one, airtec does a blue one which lets air thru but not resin.
i have the green perforated nylon from airtech and i get porosity on the carbon…maybe its the nylon’s fault?
Is it on the tool side, or the back side of the laminate? Using ester resins?
on the tool side, and the resin is epoxy. the porosity appears only between the weaving of the fabric if you know what i mean
cant say for sure, but you could try leaving the laminate for a bit before pulling a vaccum, this will enable the resin to get a bit sticky and not flow out so fasst. also could be the release agent, it might repel the resin too well, in that where there is no fibre the resin wont stay. does the resin fish eye on the mould surface? could be part of the problem.
i’m using pva, and everything sits well on it, being resin, gelcoat, clearcoat…its not a matter of fisheye’n.