The latest addition to the Halguard family of halogen-free flame retardant (HFFR) polyolefin-based cable compounds from Teknor Apex Co., Pawtucket, R.I., is designed for fiber-optic cable but also meets stringent FR requirements for general-purpose jacketing applications. Moreover, Halguard 58625 costs less than comparable premium materials thanks to its innovative flame-retardant formulation, while offering excellent flame retardance and significantly lower post-extrusion shrinkage, according to Teknor.
The new compound has a UL-94 flammability rating of V-0 and an oxygen index of 50%, while exhibiting post-extrusion linear shrinkage of only 2%. In fiber-optic applications, low shrinkage is especially desirable because it reduces the degree of stress imposed on the sensitive optical fibers during post-extrusion temperature cycling and over time during end use. The company recommends this compound for cable used in mass transit, data centers, cell towers, and other infrastructure applications. For outdoor uses, Halguard 58625 reportedly exhibits good UV resistance when tested per UL-1581.