applications feature | Wire and cable compounds
Target markets for Teknor Apex’s
Flexalloy
9617-79 PVC cable com- pound include oil drilling
(EAM) filled cables and ethylene propylene rubber (EPR) cable constructions,” the company says. The elastomers are also being used in various accessories, including separable connectors, splices and terminations. Damien Polansky, global associate marketing director, says that the addition of elastomeric resins to the portfolio “helps Dow E&T to be directly involved in nearly all phases of underground electrical infrastructure – XLPE, water-tree retardant XLPE (TR-XLPE), EAM and EPR cables and elastomer-based cable accessories.” According to Dow, Engage polyolefin elastomers
exhibit improved flexibility, trainability and less spring back for ease of installation. They also have good thermal, wet and dry electrical stability, as well as improved environmental sustainability and recyclability. Cables insulated with the compound exceed the
Association of Edison Illuminating Companies (AEIC), ICEA, Canadian Standards Association (CSA) and Normas Mexicanas (NMX) requirements for cables rated up to 46 kV. The product also recently qualified for use in Europe according to CENELEC/VDE requirements. According to Dow, the compound offers enhanced
interconnectors which can promote energy efficiency and reliability at economic prices. Anton Wolfsberger, Borealis marketing manager for energy and infrastruc- ture says that Europe has been at the forefront of technological developments in this area, but the trend is now becoming global.
Going underground Dow Electrical & Telecommunications (Dow E&T) highlights its capability in elastomeric components for underground systems. It says the recent addition of Engage polyolefin elastomers and Nordel EPDM to its portfolio expands a system solutions offering for insulation, semiconductive shield and jacket compounds that already includes the polyethylene-based Dow Endurance family. “With this addition, Dow E&T is now supplying materials for ethylene alkene copolymer
Cable benefits
Greater flexibility for ease of installation and use in constrained space Environmental sustainability Recyclability
105/140˚C insulation rating
Lower dielectric losses for longer service life Highest retained breakdown strength (AWTT) Key: C=good, B=better, A-best
electrical performance with projected longer cable life according to Accelerated Cable Life Tests (ACLT) and Accelerated Water Tree Tests (AWTT). It also offers lower and consistent insulation shield strip force for ease of installation, as well as improved heat resistance – it meets the 105°C rating. Dow says that the combination of its latest TR-XLPE insulation, Dow Endurance HFDC-4202 EC, with its super-smooth semiconducting conductor shield, low-strip insulation shield, and its various options for jacketing compounds, provides a complete high-perfor- mance system.
Drilling down Rigorous standards of fire safety need to be considered for cables used in oil, gas and mining activities, which frequently involve geographical isolation coupled with the presence of highly flammable materials. For
TR-XLPE C A B A A A
Insulation Type EPR B C C A C C
EAM A A B A B B
Dow says that while cables created with TR-XLPE deliver the best performance, alternate constructions are sometimes necessary. Options are Engage polyolefin elastomers for EAM insulation and Nordel EPDM for EPR insulation and accessories
22 COMPOUNDING WORLD | May 2015
www.compoundingworld.com
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