What are the least porous natural fibers?

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Suganth Velumani

Umang Dubey How you are going to fabricate the natural fiber raw form or UD mats?

Umang Dubey

UD mats @suganthVelumani

Pierre Caulet

As intrinsic fiber porosity is essentially linked to the Lumen of natural fibers, I suggest you research existing data on "Lumen diameter" of your prospective raw fibers. Might also want to check "Coarseness" of the fibers, as it will impact their stiffness.