Talk Composites - The Forum for Advanced Composites

Layup onto peel ply without mould release

http://www.talkcomposites.com/Topic29308.aspx

By treyland123 - 9/7/2018 1:14:42 PM

Hi there,

in short: are there any problems with doing a layup onto peel ply that's sitting on the mould, without mould release? The model will be vacuum bagged.

This is for a quick, non-structural model, and we don't have any mould release. I don't have much fabric left so don't want this thing ruined! The mould doesn't need to survive the process either.

The layups would be: mould, peel ply, 2 layers of fibreglass fabric, perforated release film (smooth finish), breather, vacuum bag. 

Any advice would be appreciated! Thank you
By treyland123 - 9/9/2018 2:55:31 AM

 
Steve Broad - 9/7/2018 8:18:13 PM
 
treyland123 - 9/7/2018 1:14:42 PM
Hi there,

in short: are there any problems with doing a layup onto peel ply that's sitting on the mould, without mould release? The model will be vacuum bagged.

This is for a quick, non-structural model, and we don't have any mould release. I don't have much fabric left so don't want this thing ruined! The mould doesn't need to survive the process either.

The layups would be: mould, peel ply, 2 layers of fibreglass fabric, perforated release film (smooth finish), breather, vacuum bag. 

Any advice would be appreciated! Thank you

In theory this should work. As peel ply needs a fair bit of muscle to peel it from a part you may well have to destroy the mould in order to get it off. Do you have any silicone polish? This would work as a release agent. Or a wax polish.

Thanks for your response! The mould being destroyed -should- be okay as long as the part comes out alright... but we don't really have much more fibreglass fabric anyway so I guess it won't matter in the end. We might try a polish, probably get one from an auto store. Thanks for the suggestion!