So I made the mistake of ordering the same white crap again just from another website because it sounded different in the description. I’m having a difficult time removing this stuff sometimes. Has anyone used a double layer?
I think illstreetcomposites and fiberglass supply sell the same exact stuff. I wish now I bought a full roll from northern composites.
Double layer of peelply? Twice the effort.
Are you having problems removing peelply, or removing a stack of peelply, resin and infusion mesh, plus runners?
If the latter, then use a perforated film between the peelply and mesh.
I think I have the same crap from illstreet… It’s horrible trying to remove it.
What is a better choice?
Many peelplies are produced in China. That is not a bad thing, but it is a bit of a gamble on what you get. It more or less depends on quality control in the supply chain.
You can check the products of Airtech. Their Econostitch is not bad, and there are others which are more dense, and easier to remove. Then there are the release coated, which are even easier, but I do not feel 100% at ease when secondary bonding. (there is more data available on secondary bonding with peelply, I added some documents to my Dropbox Composites section. (ask for access)
Be careful who you buy from. I bought what I told was econistitch and it was some cheap stuff that pulled very hard. Bought a roll from c1 and it pulled very nice and was a darker blue then the imposter. They also sold me greenflow 75 that was a thicker and less drapeable priduct then airtechs.
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Standard peel ply alone is a pain to remove, get the release coated and you wont want to go back. But the release coating is Silicon so secondary bonding is questionable like Herman mentioned. Silicon is on Boeings list of materials that can’t come in contact with the fiber for obvious reasons.
If your not bonding anything to the bag side, don’t worry about it then and go release coated.
Yeah it’s just hard to know based on some sites descriptions or when talking with reps. I may just order a bulk order and see if I can go halves with someone.
I’m having issues with my stack above not releasing. I’ve used perf release film in the past but it slows infusion drastically. I haven’t used it since and haven’t had any issues other than the peel ply not releasing easy.
Perf film should not slow down infusions, or at least not drasticly. If you are shopping for peelply, also shop for perf film from Airtech with MP22 perforation.
Or try and source some Fibertex Compoflex 150 (for smooth surface) or 150SB for peelply surface.
I have been using Econo-Ply J 1.6 oz. from fiberglassspply.com and never had problem peeling it off. I use it with green flow mesh and a strip of enkafusion filter jacket.
Econoply J is a very tight weave, lightweight polyester peelply. The tight weave helps getting the stuff off.
http://catalogue.airtech.lu/product.php?product_id=148&lang=EN
Yeah I have no idea what I’m using. It’s white, it’s tough to peel off.
I actually stuck a strip of perforated release film underneath my spiral hose inlet because that is the area that seems to stick most since sometimes it gets resin enriched.
The white stuff is impossible to peel off of complex shapes and surfaces. On complex shapes I’ve been using the porous teflon coated fiberglass. Now that stuff comes up real easy, but the only thing is it’s not drape able.
Ok so just an update.
I just pulled pulled my parts and undid all my bagging material.
The peel ply I sourced now from fiberglasssupply is superior to the one I bought at illstreet. It’s like a night and day difference. They look exactly the same, they are white, but I think the fiberglasssupply one was slightly thicker but it’s extremely hard to tell just by picking some up and feeling them side by side.
Overall I’m very happy with the new stuff I bought. It’s still tough to peel up, but it doesn’t shred to pieces like the other stuff. Something though I did different was stick a small strip of perforated release film between my peel ply and flow media. I didn’t do the entire part, I only stuck the perforated release film under a 1x6 inch section where my spiral tube inlet was since the inlets tend to get resin enriched sometimes. I actually was able to rip the entire section up with the peel ply, but that was extra insurance that everything would come off easier than before. That little strip did not affect infusion time or anything else either.
Although for more complex pieces I still prefer the porous teflon coated fiberglass.
For your resin rich area: place your resin bucket lower.
You’re pretty clever herman, haha. To tell you the truth after you mention that I think that could be it. I mean it’s only around the spiral hose inlet and that part is going to be trimmed out anyways for the most part. I did use just regular spiral hose clamps to clamp my plastic tubbing off, but I cut the tub kind of short so that when you bend up backwards against the curve and up it flips up above the part. Meaning any resin stuck in the hose is now “above” the part.
I’ll try bending the hose so it stays under the part this time, but my resin is always about 6-12 inches below the part.
Old post, but thought I’d add my 2 cents away. In case it helps someone.
That thin polyester peel ply by Airtech and sold by fiberglass supply, is nothing more than polyester (kitesurfing and sail fabric) taken from the mill, untreated and raw.
How it pulls off has nothing to do with the quality. Polyester is the clear plastic material in your water bottles. This peel ply is the exact same polyester, woven into a cloth. So it naturally has zero stick to epoxy. That’s what I like. No treatments are added to the fabric.
The force to pull off, is directly related to the amount of resin squeezed through the fabric by your vacuum pressure. This is a good thing for some applications. You want to squeeze out excess resin. Lighter parts.
Don’t use polyester peel ply if you don’t like the force to tear off. Use other types of peel ply. Or, reduce the amount of resin saturation before bagging, so the peel ply doesn’t have to expel so much resin.
Airtech products are great. We supply the canoe/boat builders out here with it and they have it dialed in. Might not be as cheap as some other plys or fabrics but it’s consistent and easy to work with.
http://shop.fiberglasshawaii.com/tools/vacuum_bagging