Hi,
I'll assume you're referring to electrical conductivity.
All carbon fabrics are pretty much equally electrically conductive taken as a whole however if you have a particular orientation in mind for the conductivity then using a unidirection carbon fibre you will find that you have much less resistance running down the fabric (in the direction of the fibre alignment) and a sigificantly higher resistance running across it. In a 0,90 biaxially woven fabric then the conductivity will be best allong the weft and the warp and, for obvious reasons of continuity, not be so good across the fabric at 45' (corner to corner).
Here's a link to
Unidirectional Carbon Fibre on our website.
I don't think anyone specifically sells electrically conductive epoxy resins. You would need to add some sort of conductive filler powder to the resin to get an sort of conductivity out of it and even then I'm not sure whether the electrically conductive filler would be in intimate contact or whether it would be effectively electrically insulated by the none conductive epoxy matrix surrounding it. Obvious conductive fillers would be aluminium, copper, and even graphite (although graphite, like carbon, will be a high resistance conductor).
If I rubbed(gently) carbon fibre on glass for couple of hours a day, will it wear down? Will the epoxy wear down not the carbon fibre!
Well, everything wears to an extent and it depends on how 'gently' the rubbing is. Both the epoxy and the carbon will wear eventually (again, like everything would) so it's hard to know exactly how to answer this question. Glass is a fairly smooth surface (at least at first) but it's worth considering that without any low friction coating the carbon will probably start to scratch the glass and then the glass will become a less smooth surface and will therefore start to wear the carbon composite faster. What I'd suggest is doing some of your own testing on this.
I hope this helps.
All the best, Matt
Matt StathamEasy Composites / Carbon Mods - Technical Sales