Abstract: A foaming composition includes a polymer having a melting temperature above 250° C., and an organic salt as chemical foaming agent having a decomposition temperature above the melting point of the polymer, where the organic salt is selected from the group of citrate derivatives and tartrate derivatives, or a mixture thereof.

Abstract: The invention provides a thermally-stable extrudable composition comprising fluropolymer and titanium dioxide, and further comprising an inorganic filler suitable for neutralizing the acid that forms during the step of extruding the composition, the filler having particles with a mean size of less than 100 nm, and preferably less than 60 nm.

Abstract: A limited combustible optical fiber includes a plurality of optical fibers in a loose tube or tight buffer arrangement. For example, a buffer tube jacket is made of a flame retardant material. A strengthening member made of aromatic polyamide fiber surrounds the buffer tube jacket. An outer layer jacket surrounds the strengthening member, wherein the buffer tube jacket and the outer layer jacket are formed by a composition including a fluoropolymeric base polymer and a nanoclay additive, such that the limited combustible fiber passes NFPA 255/NFPA 259 testing requirements.