Guys why would a peel ply not peel? Are there good and bad peel ply? I can get some to peel but for the most part I feel it’s way to hard cause it starts making the parts stress and crack my clear coats
what did you place over the peel ply ? if your absorbing material doesnt soak up the excess epoxy then you would be locking the peelply into the layer
My flow media. Then bag.
I’ve had problems with the really cheap peel ply being completely stuck onto the surface before when the process is infusion. if you’re doing infusion you need a release coated PP. econoply E or J (whichever one is THE cheapest one) doesn’t really work. aim for econolease
btw, that’s when I was also using a perforated release film, so I was even able to release the flow medium from the PP, just not the PP from the part. If you’re using a non release coating PP and the flow media is still stuck on there you’re going to need a lot of muscle to get that stuff off. It’s possible but you’re just going to be sore tomorrow and annoyed today.
That’s what I have grrrrr. Anyone need some non coated peel ply! Thanks I didn’t know there was coated and non coated when I ordered it. I will try the coated.
Yah the non coated stuff can stick like a mofo… I like to use the teflon coated stuff… pricey but comes off nicely though, you gotta sand off a bit if you do paint or clear coat
Keep that stuff away from me 
Keep in mind if you need a secondary bonding, the coated peel-ply can contaminate the piece.
WYOWINDWORKS posted this (9/18/12)
Several studies have been done on the subject. The conclusion is that polyester created the most reliable secondary bond. Nylon had bond failures with certain types off adhesive. The blue coated peel-ply performed very poorly. Interestingly, the surface texture had no effect on the strength of the bond. Tightly woven peel-ply usually releases easier.
https://depts.washington.edu/amtas/publications/presentations/Phariss_SAMPE_11-05.pdf
http://www.tc.faa.gov/its/worldpac/techrpt/ar06-28.pdf
http://www.adhesionassociates.com/papers/35%201996%20Curse%20of%20Nylon%20Peel%20Ply,%20SAM PE%20%28Anaheim%29%20MDC%20950072.pdf
“Uncoated polyester peel plies were easily removed from laminate surfaces after curing and produced good bonds with both adhesives for all textures (GIC> 850 J/m2, cohesive failure). Super Release Blue-coated polyester peel ply created surfaces that bonded very poorly in both cases (GIC< 94 J/m2, adhesion failure), the result of the transfer of the peel-ply siloxane coating to the composite surface. Nylon peel plies were more difficult to remove from the laminate and, in some cases, could not be removed without damaging the laminates. Finer weaves were easier to remove than coarser weaves. Laminate surfaces prepared with nylon peel plies bonded well with AF555 (GIC> 750J/m2, cohesive failure). Laminate surfaces prepared with nylon peel plies bonded poorly with MB1515-3 (GIC<150 J/m2, adhesion failure). This may be explained by the transfer of nylon to the prepared surface, which was found during SEM and XPS analysis. Peel- ply texture or peel-ply moisture content had no significant effect on fracture energy or mode of failure.”
Sorry for the multiple posts.
Bottom line for me (because I’ll be doing a lot of secondary bonding) is that I’ll be going with Finely Woven Uncoated Polyester Peel Ply.
i’ll take that peel ply send me your address and i’ll send you a shiping label info at photo-booth.biz