Halogen-free FR compounds for wire & cable.New halogen-free flame-retardant compounds for telecommunications and general-purpose wire and cable boast a balance of properties and processability that challenge standard EVA-based compounds for FR jacketing and insulation. DFDA-1643 NT and DFDA DFDA Defence Force Discipline Act (Australian military law) DFDA Distributed Frame-Definition Algorithm DFDA Depth First Discovery Algorithm 1643 BK are the first of this new family of polyolefin compounds from Houston-based Dow Wire & Cable Compounds. Besides halogen halogen (hăl`əjĕn) [Gr.,=salt-bearing], any of the chemically active elements found in Group 17 of the periodic table; the name applies especially to fluorine (symbol F), chlorine (Cl), bromine (Br), and iodine (I). , the products contain no lead, sulfur, or antimony antimony (ăn`tĭmō'nē) [Lat. antimoneum], semimetallic chemical element; symbol Sb [Lat. stibium,=a mark]; at. no. 51; at. wt. 121.75; m.p. 630.74°C;; b.p. 1,750°C;; sp. gr. (metallic form) 6. . Instead, they use metalhydrate flame retardants Flame retardants are materials that inhibit or resist the spread of fire. Naturally occurring substances such as asbestos as well as synthetic materials, usually halocarbons such as polybrominated diphenyl ether (PBDEs), polychlorinated biphenyls (PCBs) and chlorendic acid . Dow says only that these proprietary compounds are based on polyolefins produced with new Insite single-site catalyst and process technology. In addition to excellent ignition resistance, low smoke generation, and high abrasion abrasion /abra·sion/ (ah-bra´zhun) 1. a rubbing or scraping off through unusual or abnormal action; see also planing. 2. a rubbed or scraped area on skin or mucous membrane. resistance, these compounds boast mechanical properties that outperform traditional compounds for flame-retardant jacketing and insulation, riser cable, industrial cable, communication cable, and FTTX (Fiber To The X) Refers to all the "fiber-to-the-wherever" technologies. See FTTC and FTTP. See also FTX. applications (see table). These compounds also reportedly are easy to extrude extrude /ex·trude/ (ek-strldbomacd´) 1. to force out, or to occupy a position distal to that normally occupied. 2. in dentistry, to occupy a position occlusal to that normally occupied. without special screws. Improved electrical performance and outstanding low-temperature performance are also claimed. Tel: (800) 441-4369 * PT Direct: 295YK
DFDA-1643 NT vs. EVA FR Wire Compounds
Competing Competing Competing
DFDA- Low-Cost Easy-Flow High-Perf.
1643 NT Compound Compound Compound
Density, g/cc 1.49 1.52 1.46 1.51
Oxygen Index 37 35 -- 36
Smoke Density 168 196 278 351
(DS Max)
Non-Flaming
Tensile Str., psi 1700 2176 1595 1813
Ult. Elong., % 200 150 180 185
Tear Str., lb/in. 44 29 37 29
Hot Deform. 1 7 5 2
@90 C, %
Shore D Hard. 46 58 54 54
Dissip. Factor 0.05 0.02 0.02 0.02
@60Hz
Dielect. Const.
@60Hz 3.8 4.8 4.3 4.4
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