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Home > Forums > Materials Engineers > Materials > Composite engineering Forum

Seeing light though the weave

Read More Threads Like This One

richdav (Materials)

9 Apr 12 20:08

I was hoping for some help. We are producing a carbon and fiberglass laminate part. The carbon weave is standard plain weave and when held up to the light, light shows through the weave. We have heard that some type of urethane film had been used to solve this is. Does anyone know what this might be? We have tried dyes with mixed results. If anyone know a dye that works well with high viscosity epoxy that would be great to know as well.

Thanks in advance,

Richard Davis

Compositepro (Chemical)

9 Apr 12 21:51

Carbon black is an opaque pigment that is most commonly used. It will also obscure viewing the carbon fiber pattern which is often one of the main reasons to use carbon fiber.

berkshire (Aeronautics)

10 Apr 12 16:28

I will second Composite pro's suggestion,
Mixing carbon black into the resin is quite often used to make the layup lightproof.
It is also used as a method of cheating by some companies to make a "poor mans carbon fiber".
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor

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