Breather Q:

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#1

I’m full of questions today:D

I want to use some perforated release ply over a wet lay up followed by “econo breather”, the white stuff. Once the part is cured will there be a lot of tiny white fluffy dots left on my laminated surface? After the release ply is pulled off that is.

#2

Unless the breather is touching the part directly, it shouldn’t stick to it. Make sure to use a strong/thick peel ply though.
Also depends how much excess resin you have to take out.

#3

hmm, so i should use peel ply over the perforated release ply?

#4

If your making a flat panel its like this:

glass
peel ply (if needed, I prefer it one way or the other)
perforated release (keeps the breather dry to an extent)
Breather
bag

#5

I’ll try one part without peel ply, just perforated release film and breather.

Thanks guys :slight_smile:

#6

Perforated release film doesn’t let much resin pass. It leaves a smoother finish, but higher resin content.

#7

yes or no

It`s depend of holes size in film and how strong is that film

#8

the film is nice and thick… like 4 mil thickness and it has pinholes spaced 1/4" apart.

I need to make this thing quick, probably tomorrow i’ll try a vacuum test on just the metal tube to see if it crushes it. The tube doesn’t have enough room to tape around the ends with bag tape so i have to envelope bag it.

I may just make the bag really long so i can push the ends of the bag inside the tube so there is equal pressure on both sides of the tube wall.