Resin infusion problem!!


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Ahmedgehad
Ahmedgehad
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Hello,

I have recently made a couple of flat sandwich structure panels by resin infusion and after leaving it to set for three days I found that some of the panels' carbon fibre layers were still wet with epoxy and havent set yet. I have laid them out hoping they dry and set properly. I suspect its my fault since I may have used more resin than I needed. I would like to know whether the wet parts will eventually set and dry or not and if they do will it significantly affect the overall properties of the structure? Also, are there any troubleshooting methods I can take since I might not have enough time to make new parts before my project deadline?

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Warren (Staff)
Warren (Staff)
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If it will set or not really depends what the "problem" is. 

Did you use the correct ratio of resin to hardener?
Properly Mixed?
Temperature?
Humidity?
Contaminants?

They are the obvious things that can cause issues.  If the resin and harderner ratio is massively out then you will struggle, as will you if the mixing was poor or there were inhibiting contaminants (rare with epoxies).

However, temperature and humidity can be solved in most cases.  Heat often solves both.  Uncured epoxy is fairly hydoscopic so absorbs moisture so often lower temperatures cause 2 problems, by delaying the cure due to temperature, thus giving the opportunity for moisture to be absorbed  - especially in sheds/garages/outbuildings. If the resin hasn't cured too much you can sometimes with heat drive the moisture out and get away fairly lightly with just needing a bit of sanding and polishing to restore the surface finish. 

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
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