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#1
03-15-2011, 08:09 PM
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| Release film and peel ply I'm planning on using a Dahlar release film and Econoply peel ply from airtech to vacuum bag some epoxy laminates. Do I have to use both these layers (along with breather material and vacuum bag) or can either the release film or peel ply be left out? Last edited by weldandglass : 03-15-2011 at 08:11 PM. Reason: Spelling  |
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#2
03-16-2011, 06:29 AM
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| Kinda depends on what you're going to do with the panel after. If you're going to paint it use the release film, less sanding. If you're going to do something else like fair it or glue other stuff to it use the peel ply, it'll leave a nice textured surface ready for secondary bonding. You don't need both IMHO.
__________________ Yours Aye! Rick M/V She:Kon Blog ~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^ "It's not the boat "you built" until you've sworn at it, bled on it, sweated over it and cried beside it!" - I just made that up! |
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#3
03-16-2011, 08:30 AM
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| Knotty: Thanks for the reply. All the initial pieces I'm doing will have have things bonded to them so I guess I'm better off using the peel ply. I guess my question is will the peel ply by itself give me enough resin retention in the laminate if I'm using a low viscosity epoxy and drawing around 25 inches of Hg? |
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#4
03-16-2011, 08:34 AM
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| There's a few factors there that'd just make it guess work. Some depends on the courseness of your peel ply. Some are very fine weave and don't leave much "teeth" for a secondary bond. I always recommend you do a test panel first.
__________________ Yours Aye! Rick M/V She:Kon Blog ~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^ "It's not the boat "you built" until you've sworn at it, bled on it, sweated over it and cried beside it!" - I just made that up! |
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#6
03-18-2011, 11:25 AM
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| Quote:
For a start, I recommend: P3 perforation 15 Hg vacuum or P31 perforation 20 Hg vacuum What do you have?
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#7
03-19-2011, 11:23 AM
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| I weighed my panel after just using the peel ply (no release film) and after calculating what the core and glass should have weighed (using exact size of panel from my cad file and calculating glass and core weight based on manufacturer specified density) and subtracting that number from the actual panel weight, I get a glass to resin ratio of almost exactly 65/35. This seems pretty ideal but I feel like I need to weigh the core and glass prior to bagging so I'm feeling with actual weights and not theoretical. Is there any other way of verifying actual resin content? |
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#8
03-19-2011, 02:14 PM
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| Yes, but only by destruction. You can burn the resin out of the glass. Making a test panel is probably the easiest way. The possible error you make is not that big.
__________________ Airex C70.55 SC for sale (now updated with amounts and prices) Soteco foam for sale (Cheap!) Infusion epoxy (Hexion / Momentive) for sale |
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