Styrofoam core for engine Hatch?
Has anyone used styrofoam as a core for an engine hatch? Can it be used?
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I'm pretty sure it will melt when the risin hits it
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Originally Posted by JRider
(Post 4165236)
I'm pretty sure it will melt when the risin hits it
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It depends on the type of foam and the type of resin. Not boat specific but I've used foam cores for RC Air raft wings that were glassed, no melting of the foam. Surfers have been doing it forever as well.
Eps and epoxy resin are compatible as far as I can recall Ryan |
I'd think some plastic sheet between the two would protect the foam from the uncured resin if there were compatibility issues.
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He said styro it will melt with any Ester resin.
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Originally Posted by Dean Ferry
(Post 4165260)
Yep, just like gasoline....
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You should use a structural foam such as Airex or Coosa, etc.. They can be used with either polyester, vinyl ester, or epoxy. Styrene foams are generally too weak and will melt with the styrene monomer that is in polyester and vinyl ester. And, no, you do not want to put a sheet of protective plastic between the foam and resin/cloth layup as this would prevent the bonding of laminate and foam which is key to creating the strong I-beam structure. The engine hatch cover needs to be a stiff structure for obvious reasons, so it would be foolish to cut corners on laminate schedules. Do use vinyl ester or epoxy with the proper foam core as they are far superior to iso polyester.
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Great info, thanks for the input ren3.
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Ok so structural foam is best.
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