Prepreg EP112-68-50, standard thickness? 1

[SebHoiting]

Does anyone know the standard thickness of EP112-68-50 Prepreg carbon Fiber?

We encoutered this material at work in some old german work instructions. The only thing i'm sure of is that the 50 at the end stands for 50% resign.

 

[RPstress]

Unless that's a very dense resin it will amount to a carbon fiber volume of just 43%, maybe 45% with phenolic, if the resin % is weight % of total laminate weight.

Google shows some EP112-68-37 references, which would make sense for the last number being resin wt.%.

Without an areal weight for the combination or the carbon somewhere it leaves me guessing; maybe the 68 is areal fiber weight in gsm (very light, but just about feasible). This would give a CPT of about 0.1 mm with all that resin. Seems awfully thin unless it's a veil or something.

If it was a resin vol.% with 68 gsm carbon the thickness would be more like 0.08 mmm.

If the 112 is the carbon areal weight in gsm (sliightly more sensible) thicknesses would be 0.15 mm for resin 50 wt.% (0.13 mm for resin vol.%).

Sorry not to be more helpful.

If no one is more knowledgable then red flag this post and repost in the composites forum (you may have flouted the no-double-posting rule anyway, in which case you should probably RF this one).

Knowing more context might well enable better guessing if no one comes back with hard info.

 

[rb1957]

are you trying to reverse engineer something ? maybe re-making an old mod ??