13: ARAMIDS 307
13.2.7 Honeycombs
Aramid honeycombs find use in the fields of
aerospace, transport equipment, etc. Aramid honey-
comb sheets comprising a nylon-type resin, particu-
larly a p-aramid honeycomb resin, have flame retar-
dant, tough, and other excellent properties required
for a honeycomb core structure. However, the method
of fabrication of aramid honeycombs is a rather com-
plicated process. The process is described in detail in
the literature [50,51].
13.2.8 Aramid Films
Aromatic PA films are produced by casting a poly-
mer solution in sulfuric acid onto an endless belt. In
addition, the solution contains microparticles of silica
to improve the surface properties. The casting solution
is guided after intermediate heating into a coagulation
bath ...