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Sealing a core

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crabman
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Sealing a core

Postby crabman » Mon Dec 19, 2005 7:36 pm

To seal a core the best and fastest way is to use a 25gsm glass veil .This is the same material used for nomex honeycomb to stop de lamination.If done right it wont need sandinghttp://www.racingfinish.co.uk

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sq225917
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Postby sq225917 » Mon Dec 19, 2005 8:36 pm

eh, not really.

using a glass veil on honeycomb is to stop it wetting through into the voids when you come to wet out the top layer of glass. basically it's a frig to allow you to wet build, as part of a two shot cure process, with a material that was only ever designed to be used with pre-impregnated resin free fibre products.

if you want to stop nomex from delaminating in a structure then the best thing you can do is sand the horizontal edges of the top and bottom surface of the nomex sheet, until it goes slightly furry, this increases the effective bonding surface nearly 200%.

dont wet layup, nomex, it's a waste of good nomex. stick to foam as you'll never get 60% of the performance of the nomex core in the finished product.

crabman
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Postby crabman » Tue Dec 20, 2005 8:56 am

All the boatbuilders in the world must be wrong then .We dont use nomex .It was a figure of speach to use the veil. Use a carbon veil its lighter,or you can use a carbon nomex or plastic nomex.For our boards we use a foam thats made for us.As to resin getting in the nomex ,it depends which way you lay it up.Everone thinks there way is best which is cool.

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sq225917
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Postby sq225917 » Tue Dec 20, 2005 2:27 pm

eh, no i think the boat builders know what they are doing.

but sealing with a veil topsheet, the process you refer too, has nothing to do with sealing a core, which you do to remove dust and give a good base to laminate against..

all of which has nothing to do with nomex or other honeycomb cores, which you would never use with wet layup, unless you wanted to waste your time and money completely.

wow, you get a foam blown just for your boards, you must be making 1000's of them a year to demand that sort of support from a foam supplier.





i dont mean to be rude, but shouldn't you be at school...

crabman
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Postby crabman » Tue Dec 20, 2005 7:07 pm

Yeah whatever Whatever you say your right. Now say what you have just said on the engenering composites forum. Let me know how you get on.

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sq225917
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Postby sq225917 » Wed Dec 21, 2005 1:18 am

sorry mate, obviously you must be talking about a different nomex,one that is made for wet layup.

my mistake..

crabman
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Postby crabman » Fri Mar 24, 2006 5:03 pm

Looks like you are going to have to eat your words about honeycomb.Check it out http://www.racingfinish.co.uk

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Postby kiteboardingcentral.com » Mon Mar 27, 2006 6:34 pm

shut up.

crabman
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Postby crabman » Mon Mar 27, 2006 7:34 pm

Would sir like some of the latest core on the market!


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