The present invention relates to a sheath material for an
optical fiber cable, and a production process thereof. The sheath material comprises, by weight, 85-95% of a
polyolefin base material, 2.35-2.85% of
carbon black, 0.5-1% of an
antioxidant, and 0.8-1% of an additive, wherein the
polyolefin base material comprises a
polyethylene base material and a modifier, and the additive comprises a
fluorine-containing rheological agent PPA, a
lubricant, a plastic brightening agent and a softener. During production,
carbon black is made into a
masterbatch; PPA is made into a
masterbatch by using a
polyethylene base material; the
carbon black masterbatch, the PPA masterbatch, an
antioxidant, a plastic brightening agent and a softener are mixed; the mixed material is added to EVA to mix; the resulting mixture is added to
polyethylene to mix, and then
mastication extrusion is performed through a plastic extruder. According to the present invention, high and
medium density polyethylene is adopted as a base material for the
optical fiber cable sheath, such that a chemical performance is stable; and various auxiliary materials are added to the polyethylene base material, such that performances of the
optical fiber cable sheath are improved, and various use requirements of the optical
fiber cables are met.