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capiliary action in plastic moldings

capiliary action in plastic moldings

capiliary action in plastic moldings

Hello eveyone,

Please can you help me.

I am designing a plastic enclosure that houses a PCB which needs to pass an IPX4 test.

I am currently have problems when testing the enclosure that in that the walls I have created to prevent water ingress seem to be drawing water in to the moulding as a result of capiliary action. Therefore I was hoping that someone could give a key point/rules when desiging the overlapping walls which will prevent capiliary action from taking place.

To give you a quick idea the enclosure is approxiately 150 x 150 x 30mm in size and the walls I have currently designed have about 10mm of overlapp and a clearance of approxiamately 0.15mm.

Thanks for your help in advance.  

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