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,%20SAMPE%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.”
