Two tiny questions: "V" weave and spray adhesive


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composites
composites
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Hello, I found a carbon fibre cloth which already looks like the finished "V" weave on this website.
Do you think it's a good carbon fibre cloth? 3K4X4TW50-V (V 4x4 Twill)

My second question is about this spray adhesive from Airtech.
I don't use a gelcoat and I'm searching a spray adhesive which causes as less surface imperfections as possible.
Do you think this spray adhesive could be the right choice?
morepower
morepower
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cannot respond about the material but I have done that formation myself in pre-preg doing it the normal way...


The adhesive is basically a re-branded 3M 77 adhesive.
composites
composites
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Looks great! I know this technique but with the carbon fibre cloth from this website, it should be possible to do the same job by resin infusion.
So, that means that the airtech spray adhesive is similar to the 3M 77?
carboncactus
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Airtac 2 will not leave a residue, it's made specifically for that. In fact I need some. I have an account with Tygavac. If you want, we can share the cost, as shipping is something crazy like £15.

http://www.talkcomposites.com/Uploads/Images/db628ad5-e0e7-47b9-873a-3d84.png
morepower
morepower
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composites (09/07/2013)
Looks great! I know this technique but with the carbon fibre cloth from this website, it should be possible to do the same job by resin infusion.
So, that means that the airtech spray adhesive is similar to the 3M 77?





No IT IS the same stuff just re-branded. I have used both and a friend of mine told me about using 3M 77 spray as it is cheaper. So now I use the 3M product.
Edited 11 Years Ago by morepower
andygtt
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I've done V weave using pro carbon with resin infusion.... IMO the issue with pre V weave material is getting the V exactly where you want it.

I use aero 2 adhesive as recomended by easycomposites... just dont use too much of any adhesive as they will all leave some sort of residue unless they are epoxy based... and I havnt found an epoxy based one available yet Sad


Jess8bit
Jess8bit
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fantastic job !!!

did you spray gel coat or is it only resin + clear lacquer ?
andygtt
andygtt
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I use infusion with no gel coat on all my items then clear coat them.... My parts are very large and complex so I have the bags occasionally fail slightly which leaves pinholes, these parts would be scrap if they were gel coated but with raw resin I can do a heavy clear coat and recover them.

Also clear coat gives a glossier finish which is a must on car panels

I always stick one side of the V weave down first with great effort to get it straight and true, then I overlap the second layer to give the join strength... its not exactly easy, but it is acheivable 
alebassa
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That bonnet is really impressive!! wonderful!!

I hope I will be able todo something like that one day!

For the adhesive... I use this: adesivo spray Mates I-tak

which I think is the same as airtac, and even if it's not epoxy based, I had no problem of residues... I use it very lightly but in fact you don't need much to make the fabric stick to the mould..

A little Offtopic for moderators... why if I quote a post my reply goes into the quote??? I have to write it before the quote or it doesn't work.. maybe I'm doing something wrong? I've seen it happens also to other users...

andygtt (24/07/2013)
I've done V weave using pro carbon with resin infusion.... IMO the issue with pre V weave material is getting the V exactly where you want it.

I use aero 2 adhesive as recomended by easycomposites... just dont use too much of any adhesive as they will all leave some sort of residue unless they are epoxy based... and I havnt found an epoxy based one available yet Sad





Alessandro
Jess8bit
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ok I guess you mean in some place there is not enough bag pressure, so if you were gel coating the mold before the infusion, you'd have places were the infused resin would not fill properly the voids, between the gel coat layer and the clothe, is that it ?

thank you Smile
GO

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