Patent ID: 7187829

Claim:
A low smoke, low toxicity fiber optic cable that comprises: (1) at least one optical fiber; (2) a primary buffer member circumferentially surrounding each optical fiber, wherein the primary buffer member is prepared from a material selected from the group of silicones, acrylic polymers, acrylates and polyimides; (3) a secondary buffer member circumferentially surrounding the primary buffer member, wherein the secondary buffer member is prepared from, or has an outer surface or layer prepared from, a material selected from the group of bondable polyimides and grafted or modified fluoropolymers; (4) a strength member circumferentially surrounding the secondary buffer member; and (5) an outer protective jacket circumferentially surrounding the strength member, wherein, when tested in accordance with Boeing Specification Support Standard BSS 7324 (Dec. 2, 1998) Smoke Emission Test Method, the cable produces, at four minutes in the flaming mode, a smoke with a specific optical density of less than 100.